- Double Stars -

And (43)	Cet (1)	Del (4)	Lib (1)	Per (27)	UMi (1)
Aql (9)	CMa (2)	Dra (11)	LMi (6)	Psc (10)	Vir (9)
Ari (8)	Cnc (10)	Equ (5)	Lyn (18)	Pup (1)	Vul (3)
Aur (28)	Com (8)	Eri (1)	Lyr (11)	Ser (3)
Boo (20)	CrB (4)	Gem (22)	Mon (1)	Sex (2)
Cam (11)	Crv (1)	Her (16)	Oph (1)	Tau (11)
Cas (17)	CVn (14)	Hya (4)	Ori (9)	Tri (4)
Cep (13)	Cyg (26)	Leo (24)	Peg (16)	UMa (38)

1 Ari (**)

Name:	1 Ari, STF174
Type:	**
Constellation:	Ari
Coordinates:	01h50m08.60s / +22°16'29.50"

Components:
	m₁	m₂	ρ	θ	Year
	6m3	7m2	2.9"	165°	2018

Robert Zebahl
63mm f/13.3, 46x, Bortle 6-, SQM-L 19.0 Clearly split, but tight with noticeable difference in brightness.
70mm f/5.7, 80x At 67x pretty tight pair, but separated with a clear difference in brightness. The primary component appeared in a hint of orange. At 80x easy to separate.
8" f/6, 100x, Bortle 4, NELM 5m9+, SQM-L 21.0 Conditions in the target region: SQM-L 20.8 Nice double star with big difference in brightness.

11 Hya (**)

Name:	11 Hya, epsilon Hya
Type:	**
Constellation:	Hya
Coordinates:	08h46m46.51s / +06°25'07.70"

Components:
		m₁	m₂	ρ	θ	Year
SP1	AB	3m5	5m0	0.2"	241°	2018
STF1273	AB-C	3m5	6m7	2.9"	309°	2017
STF1273	AB-D	3m5	12m5	18.1"	201°	2017
STF1273	AB-E	3m5	10m8	340.5"	2°	2015
STF1273	AB-F	3m5	10m4	406.5"	265°	2015



Robert Zebahl
70mm f/5.7, 133x, Bortle 6- AB-C: Not split. Although a slight brightening was visible in the first diffraction ring, it could also have come from slight coma of the refractor.
102mm f/11, 160x, Bortle 7, SQM-L 18.8, Seeing 3/5 AB-C: 2020-03-27: The much fainter companion is well visible as an almost round knot directly at the diffraction ring of the primary component. Very nice sight. The seeing was mediocre (3/5).
152mm f/5.9, 150x, Bortle 7, SQM-L 18.8, Seeing 3/5 AB-C: 2020-03-27: The companion is immediately visible as a tiny star close to the primary component. Due to the chromatic aberration of the achromat, there is a slight tendency to outshine. Nevertheless a nice view. The seeing was mediocre (3/5).

15 Aql (**)

Name:	15 Aql, SHJ286
Type:	**
Constellation:	Aql
Coordinates:	19h04m57.67s / -04°01'53.10"

Components:
	m₁	m₂	ρ	θ	Year
	5m5	7m0	39.4"	210°	2019

Robert Zebahl
70mm f/5.7, 22x Striking, pretty wide, uneven pair. Primary component gleamed in shiny orange, the companion appeared slightly orange.
8" f/6, 37x, Bortle 5-, SQM-L 20.4 Conditions in the target region: SQM-L 19.9 Easy to split, evident. Both components appeared slightly orange colored.

16/17 Dra (**)

Name:	16/17 Dra
Type:	**
Constellation:	Dra
Coordinates:	16h36m13.72s / +52°55'27.80"

Components:
		m₁	m₂	ρ	θ	Year
STFA30, 16/17 Dra	AC	5m4	5m5	90.0"	193°	2017
STF2078, 17 Dra	AB	5m4	6m4	3.3"	104°	2018

Robert Zebahl
55mm f/9.1, 71x Grand sight!
55mm f/9.1, 27x STFA30 (AC): Rather wide pair with almost equal components. C component appeared slightly yellowish-orange.

25 CVn (**)

Name:	25 CVn
Type:	**
Constellation:	CVn
Coordinates:	13h37m27.70s / +36°17'41.40"

Components:
		m₁	m₂	ρ	θ	Year
STF1768	AB	5m0	7m0	1.7"	99°	2018
STF1768	AC	5m0	11m6	214.3"	321°	2015
KZA73	AD	5m0	13m0	335.6"	92°	2015
KZA73	AE	5m0	12m7	369.5"	139°	2015
KZA73	AF	5m0	9m4	437.3"	118°	2015



Robert Zebahl
60mm f/18.7, 160x AB: 2020-03-16: 102/1122mm ED refractor stopped down to 60mm. The diffraction ring of the primary component is virtually invisible. The companion appears only in few moments as an extremely faint, elongated brightening in the diffraction ring. Very difficult. Telescope should be in very good optical condition!
70mm f/16, 160x AB: 2020-03-16: 102/1122mm ED refractor stopped down to 70mm. Companion only visible as a subtle, elongated, not permanently visible brightening. The diffraction ring of the primary component is only visible occasionally. Difficult. Telescope should be in good optical condition!
80mm f/14, 160x AB: 2020-03-16: 102/1122mm ED refractor stopped down to 80mm. Companion permanently visible as elongated brightening in the diffraction ring. But the diffraction ring itself appears rather faint. Moderately difficult.
90mm f/12.5, 160x AB: 2020-03-16: 102/1122mm ED refractor stopped down to 90mm. Companion quite clearly recognizable as elongated brightening in diffraction ring. Relatively simple.
102mm f/11, 160x AB: 2020-03-16: The faint companion is immediately recognizable as a distinct, slightly elongated brightening in the diffraction ring. Easy.
152mm f/5.9, 150x, Bortle 6-, SQM-L 19.1 AB: 2020-03-19: At 150x the clearly fainter companion is visible as a roundish brightening. Due to the chromatic aberration of the achromat (152mm f/5.9) the companion is almost outshined. At 180x the companion is then well, at 225x and 300x very well visible as a tiny separated star.

26 Aur (**)

Name:	26 Aur, STF753
Type:	**
Constellation:	Aur
Coordinates:	05h38m38.10s / +30°29'32.80"

Components:
		m₁	m₂	ρ	θ	Year
	AB-C	5m5	8m4	12.0"	269°	2013

Robert Zebahl
70mm f/5.7, 22x Separable at 22x, but quite close together and pretty uneven. Primary component appeared in bright orange. At 57x easy to separate. The faint companion appeared silvery-blue.

30 Ari (**)

Name:	30 Ari
Type:	**
Constellation:	Ari
Coordinates:	02h37m00.52s / +24°38'50.00"

Components:
		m₁	m₂	ρ	θ	Year
STFA5	AB	6m5	7m0	37.9"	275°	2018
RAO8	BC	7m0	11m0	0.6"	282°	2018

Robert Zebahl
B 8x44 AB: 2020-11-25: Easy to split at still quite small separation and visible difference in brightness. The primary component appeared white-yellowish, the companion darker.
70mm f/5.7, 22x AB: At 22x widely separated, striking with a rather small difference in brightness. A seemed a bit warmer in color compared to B with a hint of orange. At 44x, both seemed slightly orange with very little difference in color.

41 Lyn (**)

Name:	41 Lyn, S598
Type:	**
Constellation:	UMa
Coordinates:	09h28m39.99s / +45°36'06.50"

Components:
		m₁	m₂	ρ	θ	Year
	AB	5m5	7m8	69.7"	160°	2017


This star has the designation 41 Lyn but is assigned to UMa. At the time, when Flamsteed numbered the stars, the constellation boundaries were not exactly defined. Another example is 10 UMa, which is located in Lyn today.
Robert Zebahl
B 8x40, Bortle 7, NELM 5m0, SQM-L 19.2 Fairly well split with fainter component.

52 Her (**)

Name:	52 Her
Type:	**
Constellation:	Her
Coordinates:	16h49m14.20s / +45°59'00.40"

Components:
		m₁	m₂	ρ	θ	Year
A1866	BC	9m5	9m6	0.3"	266°	2012
BU627	A-BC	4m8	8m4	2.2"	44°	2018



Robert Zebahl
102mm f/11, 280x, Bortle 6 BU627 (A-BC): At 160x the faint component is already beginning to be visible as brightening in the first diffraction ring. At 280x the brightening is quite clearly visible and appears partly clear as a small knot in the first diffraction ring.

59 And (**)

Name:	59 And, STF222
Type:	**
Constellation:	And
Coordinates:	02h10m52.83s / +39°02'22.40"

Components:
	m₁	m₂	ρ	θ	Year
	6m0	6m7	16.5"	36°	2018

Robert Zebahl
B 8x44 2020-11-25: Just separated with visible difference in brightness.
120mm f/5, 18x, Bortle 6, SQM-L 19.3 Well split with noticeable difference in brightness.
8" f/6, 100x, Bortle 4, NELM 6m0, SQM-L 20.9 Conditions in the target region: SQM-L 20.4 Nice and evident double star, easy to split. About 12 arcminutes NE there is NGC828 (v12.3m),

67 UMa (**)

Name:	67 UMa
Type:	**
Constellation:	UMa
Coordinates:	12h02m06.80s / +43°02'44.30"

Components:
		m₁	m₂	ρ	θ	Year
FOR1	AB	5m2	6m7	274.4"	62°	2015
ARN5	AC	5m2	8m5	375.9"	25°	2015
FOR1	AD	5m2	8m9	363.2"	268°	2015

Robert Zebahl
B 8x40 2020-04-05: The pair AB stands out immediately and shows itself in beautiful colors: A white-yellowish, B slightly orange. Almost at right angles to pair AB component C is visible as a faint star at a slightly smaller distance. I did not pay attention to the even fainter component D.
55mm f/9.1, 27x 2020-04-05: Components A, B and C easily visible with decreasing brightness. I did not consider component D. A: white-yellowish, B: pale orange. I liked the view in the 8x40 binoculars better.

70 Oph (**)

Name:	70 Oph, P Oph, STF2272
Type:	**
Constellation:	Oph
Coordinates:	18h05m27.37s / +02°29'59.30"

Components:
		m₁	m₂	ρ	θ	Year
	AB	4m2	6m2	6.8"	121°	2018



Robert Zebahl
8" f/6, 80x, Bortle 5, SQM-L 20.7 Conditions in the target region: SQM-L 20.1 Well split at 80x. Brighter component appeared white, fainter one slightly orange.

164 And (**)

Name:	164 And, STF79
Type:	**
Constellation:	And
Coordinates:	01h00m03.56s / +44°42'47.70"

Components:
	m₁	m₂	ρ	θ	Year
	6m0	6m8	7.9"	195°	2018

Robert Zebahl
55mm f/9.1, 25x, Bortle 7, SQM-L 19.0 Beautiful double star, relatively tight with visible difference in brightness.

A 193 (**)

Name:	A193
Type:	**
Constellation:	And
Coordinates:	23h01m23.99s / +46°38'18.00"

Components:
	m₁	m₂	ρ	θ	Year
	9m6	9m8	1.6"	176°	2017

Robert Zebahl
102mm f/11, 160x, Bortle 6-, SQM-L 19.0 Observed at 125x and 160x under urban conditions (Bortle 6-, SQM-L 19.0). Too faint to separate the components.

A 968 (**)

Name:	A968
Type:	**
Constellation:	And
Coordinates:	02h31m15.90s / +47°02'32.10"

Components:
	m₁	m₂	ρ	θ	Year
	9m0	9m5	1.8"	27°	2018

Robert Zebahl
102mm f/11, 125x, Bortle 6-, SQM-L 19.0 Clearly split, tight, slightly unequal.

A 1487 (**)

Name:	A1487
Type:	**
Constellation:	And
Coordinates:	23h29m12.09s / +40°42'09.40"

Components:
	m₁	m₂	ρ	θ	Year
	9m0	9m5	1.1"	157°	2016

Robert Zebahl
102mm f/11, 125x, Bortle 6-, SQM-L 19.0 At 125x clearly visible as figure '8' with equally bright components. At 160x comparable view.

A 1528 (**)

Name:	A1528
Type:	**
Constellation:	And
Coordinates:	02h35m42.19s / +44°11'23.30"

Components:
	m₁	m₂	ρ	θ	Year
	9m4	9m6	1.6"	193°	2017

Robert Zebahl
102mm f/11, 160x, Bortle 6-, SQM-L 19.0 At 125x almost separated with visible difference in brightness. AT 160x rather faint, barely split, little difference in brightness.

A 1575 (**)

Name:	A1575
Type:	**
Constellation:	Lyn
Coordinates:	07h03m01.14s / +54°02'55.40"

Components:
	m₁	m₂	ρ	θ	Year
	8m6	9m3	0.8"	283°	2016

Robert Zebahl
102mm f/11, 160x, Bortle 6-, SQM-L 19.0 Not clearly visible as double star.
152mm f/5.9, 225x, Bortle 6, SQM-L 19.4 2020-03-23: At 225x and 300x clearly elongated, partly seen as figure '8'.

A 2906 & STF 314 (**)

Name:	A2906 & STF314, WDS02529+5300
Type:	**
Constellation:	Per
Coordinates:	02h52m52.03s / +52°59'50.60"

Components:
		m₁	m₂	ρ	θ	Year
A2906	AB	7m3	8m8	0.3"	115°	2018
STF314	AB-C	7m0	7m3	1.6"	316°	2018



Robert Zebahl
152mm f/5.9, 129x, Bortle 6, SQM-L 19.2 STF314 (AB-C): Beautifully separated, quite close together. Difference in brightness visible, but rather small. Easy to find and bright. Very nice.

AC 1 (**)

Name:	AC1
Type:	**
Constellation:	And
Coordinates:	00h20m54.10s / +32°58'40.90"

Components:
	m₁	m₂	ρ	θ	Year
	7m3	8m3	1.9"	290°	2018



Robert Zebahl
102mm f/11, 125x, Bortle 6-, SQM-L 19.0 Very attractive, relatively close with a clearly visible difference in brightness. In the immediate vicinity a brighter star shines in a lovely orange. Very nice contrast!

AC 14 (**)

Name:	AC14
Type:	**
Constellation:	And
Coordinates:	01h28m19.28s / +42°46'56.00"

Components:
	m₁	m₂	ρ	θ	Year
	8m3	8m9	0.7"	93°	2018

Robert Zebahl
152mm f/5.9, 300x Immediately visible as a double star, almost separated with little difference in brightness.

AG 190 (**)

Name:	AG190
Type:	**
Constellation:	CVn
Coordinates:	13h35m38.82s / +49°39'21.70"

Components:
	m₁	m₂	ρ	θ	Year
	9m6	9m8	2.6"	13°	2017

Robert Zebahl
70mm f/5.7, 80x, Bortle 6, SQM-L 19.4 2020-04-20: Pretty faint double star. At 80x still very tight pair with little difference in brightness. Not very attractive.

AGC 1 (**)

Name:	AGC1, 9 CMa, alpha CMa, Sirius
Type:	**
Constellation:	CMa
Coordinates:	06h45m08.92s / -16°42'58.00"

Components:
		m₁	m₂	ρ	θ	Year
	AB	-1m5	8m4	10.7"	75°	2016



Robert Zebahl
120mm f/5, 150x, Bortle 6-, SQM-L 19.0, Seeing 3/5 2021-03-02: Used magnifications from 86x to 200x using a Baader yellow filter. The diffraction disk was relatively good visible, but the diffraction rings were noticeably in movement (Seeing 3/5).

alpha Lib (**)

Name:	alpha Lib, Zubenelgenubi, Kiffa Australis, Lanx Australis
Type:	**
Constellation:	Lib
Coordinates:	14h50m52.78s / -16°02'29.80"

Components:
		m₁	m₂	ρ	θ	Year
SHJ186	AB	2m7	5m2	231.1"	314°	2012
AOT53	AC	2m7	12m5	275.6"	291°	2000


Component A: 9 Lib, alpha 2 Lib Component B: 8 Lib, alpha 1 Lib The standardized name Zubenelgenubi only refers to alpha 2 Lib.

beta Cyg (**)

Name:	beta Cyg, 6 Cyg, Albireo, STFA43
Type:	**
Constellation:	Cyg
Coordinates:	19h30m43.29s / +27°57'34.90"

Components:
		m₁	m₂	ρ	θ	Year
	AB	3m2	4m7	34.6"	54°	2019

Robert Zebahl
B 16x70, Bortle 7, SQM-L 18.6 2020-07-06: Bright orange & white-bluish.
B 8x40, Bortle 5, NELM 5m5 Well split, but I didn't recognised any color.
80mm f/6.25, 25x One of the most beautiful double stars in the northern hemisphere. Differences in brightness and color (orange-blue) are brilliant! Even under urban conditions with small aperture an enjoyment!

beta Lyr (**)

Name:	beta Lyr, 10 Lyr
Type:	**
Constellation:	Lyr
Coordinates:	18h50m04.79s / +33°21'45.60"

Components:
		m₁	m₂	ρ	θ	Year
STFA39	AB	3m6	6m7	45.7"	149°	2017
BU293	AE	3m6	10m1	67.2"	317°	2015
BU293	AF	3m6	10m6	86.0"	18°	2015

Robert Zebahl
70mm f/5.7, 22x At 22x and 57x the components A, B, E and F were easily seen. The B component appeared slightly bluish-silver at 22x, but at 57x the color was difficult to tell. All four components form a slightly curved 'Y' with the bright A component in the center.
102mm f/11, 62x, Bortle 6 Components A, B, E and F are easily visible. The two southern stars on the drawing do not belong to the system.

BGH 46 (**)

Name:	BGH46
Type:	**
Constellation:	Com
Coordinates:	13h16m32.26s / +19°47'07.00"

Components:
		m₁	m₂	ρ	θ	Year
	AB	6m5	7m6	202.9"	58°	2015

Robert Zebahl
B 8x40 2020-04-05: Widely separated with well visible difference in brightness. A appeared slightly white-bluish, B darker in color and not clearly definable.

BLL 49 (**)

Name:	BLL49, U Cyg
Type:	**
Constellation:	Cyg
Coordinates:	20h19m41.66s / +47°54'19.90"

Components:
	m₁	m₂	ρ	θ	Year
	8m0	9m0	65.4"	231°	2015

Robert Zebahl
B 16x70 2020-07-03: Easy split with very good color contrast: white and clear orange.
102mm f/11, 28x, Bortle 6+, SQM-L 19.4 2019-08-22: While the primary component appears quite unspectacular in a white, the companion U Cygni is much more interesting. It is a carbon star whose brightness varies between 5m9 and 12m1 with a period of about 463 days. It appears in mostly intensely orange, and even deep red in the towards its minimum. Extremely rewarding!

BU 1 (**)

Name:	BU1
Type:	**
Constellation:	Cas
Coordinates:	00h52m49.22s / +56°37'39.50"

Components:
		m₁	m₂	ρ	θ	Year
	AB	8m6	9m3	1.5"	83°	2016
	AC	8m6	8m9	3.9"	134°	2017
	AD	8m6	9m7	9.0"	194°	2017
	AE	8m6	12m1	15.8"	333°	2015
	CD	8m9	9m7	7.8"	220°	2016

Robert Zebahl
70mm f/5.7, 57x, Bortle 7 AC: Easy to split with little difference in brightness.
70mm f/5.7, 57x, Bortle 7 AD: Relatively large angular distance with obviously fainter component.

BU 32 (**)

Name:	BU32, 6 Ser
Type:	**
Constellation:	Ser
Coordinates:	15h21m02.00s / +00°42'55.20"

Components:
		m₁	m₂	ρ	θ	Year
	AB	5m5	8m8	3.4"	22°	2008

Robert Zebahl
102mm f/11, 224x Not split. Tried at 224x and 280x. Companion probably too faint. I had sidewalk lighting in the immediate vicinity.

BU 67 (**)

Name:	BU67
Type:	**
Constellation:	Cyg
Coordinates:	20h50m36.05s / +30°54'45.70"

Components:
	m₁	m₂	ρ	θ	Year
	6m8	9m9	1.5"	310°	2015

Robert Zebahl
152mm f/5.9, 270x, Bortle 6 Not split.

BU 105 (**)

Name:	BU105, kappa Leo, 1 Leo
Type:	**
Constellation:	Leo
Coordinates:	09h24m39.28s / +26°10'56.80"

Components:
		m₁	m₂	ρ	θ	Year
	AB	4m6	9m7	2.0"	209°	2015
	AC	4m6	11m1	147.7"	212°	2015

Robert Zebahl
152mm f/5.9, 300x, Bortle 6-, SQM-L 19.2, Seeing 2-3/5 AB: 2020-04-22: The seeing (2-3/5) was not good enough. The diffraction disk was reasonably well visible, but the diffraction rings smudged. No split.
152mm f/5.9, 300x, Bortle 6, SQM-L 19.4, Seeing 3/5 AB: 2020-04-24: Seeing was mediocre (3/5). The faint companion was partly seen as a distinct brightening in the first diffraction ring of the primary component. Not at all easy. Steady air necessary.

BU 130 (**)

Name:	BU130, 90 Her
Type:	**
Constellation:	Her
Coordinates:	17h53m18.03s / +40°00'28.60"

Components:
	m₁	m₂	ρ	θ	Year
	5m3	8m8	1.6"	110°	2009

Robert Zebahl
120mm f/5, 300x, Bortle 6 Not split at 200x and 300x. I used a 120/600mm achromat.

BU 167 (**)

Name:	BU167
Type:	**
Constellation:	Cyg
Coordinates:	21h36m13.98s / +30°03'19.50"

Components:
	m₁	m₂	ρ	θ	Year
	6m4	9m9	1.7"	89°	2016

Robert Zebahl
152mm f/5.9, 360x, Bortle 6- The much fainter component was only occasionally visible as a clear brightening of the first diffraction ring. The diffraction ring itself was only indicated and not visible all around. Difficult.

BU 483 (**)

Name:	BU483
Type:	**
Constellation:	And
Coordinates:	00h09m03.67s / +40°50'34.30"

Components:
		m₁	m₂	ρ	θ	Year
	AC	7m0	7m7	158.5"	268°	2015

Robert Zebahl
B 8x40, Bortle 7, SQM-L 19.0 Large distance with significant difference in brightness.

BU 533 (**)

Name:	BU533
Type:	**
Constellation:	Per
Coordinates:	03h35m37.81s / +31°40'48.70"

Components:
		m₁	m₂	ρ	θ	Year
	AB	7m5	7m7	1.0"	222°	2018



Robert Zebahl
152mm f/5.9, 225x, Bortle 6, SQM-L 19.2 At 129x clearly elongated, notched. At 225x just so separable with similarly bright components.

BU 535 (**)

Name:	BU535, omicron Per, 38 Per, Atik
Type:	**
Constellation:	Per
Coordinates:	03h44m19.13s / +32°17'17.70"

Components:
	m₁	m₂	ρ	θ	Year
	3m9	6m7	1.1"	20°	2015

Robert Zebahl
152mm f/5.9, 300x, Bortle 6-, SQM-L 19.0 In steady moments the faint companion is clearly recognizable as a small brightening in the first diffraction ring of the primary component.

BU 560 (**)

Name:	BU560
Type:	**
Constellation:	Aur
Coordinates:	05h47m24.87s / +29°39'26.90"

Components:
	m₁	m₂	ρ	θ	Year
	7m8	8m2	1.7"	124°	2019



Robert Zebahl
70mm f/5.7, 100x Clearly visible as a double star with overlapping diffraction disks (figure '8') and small difference in brightness.
152mm f/5.9, 129x, Seeing 2-3/5 Separated with very little difference in brightness, relatively tight. Overall easy.

BU 728 (**)

Name:	BU728
Type:	**
Constellation:	And
Coordinates:	23h52m09.63s / +43°30'31.60"

Components:
		m₁	m₂	ρ	θ	Year
	AB	8m7	8m9	1.3"	10°	2016

Robert Zebahl
102mm f/11, 160x, Bortle 6-, SQM-L 19.0 At 125x two overlapping Airy disks with a small difference in brightness are visible. At 160x slightly better and almost separated.

BU 1008 (**)

Name:	BU1008, eta Gem, 7 Gem, Propus
Type:	**
Constellation:	Gem
Coordinates:	06h14m52.69s / +22°30'24.60"

Components:
	m₁	m₂	ρ	θ	Year
	3m5	6m2	1.8"	258°	2017



Robert Zebahl
152mm f/5.9, 225x, Bortle 6, SQM-L 19.3, Seeing 3/5 Already comparatively easy at 180x. The faint companion can be seen well as a quite distinct, slightly elongated, partly round brightening. At 225x and above it becomes easy and immediately apparent, even if the diffraction rings of the primary component are not permanently visible due to the seeing. The primary component was shining in a bright orange.

BU 1053 (**)

Name:	BU1053
Type:	**
Constellation:	Aur
Coordinates:	05h53m28.64s / +37°20'20.70"

Components:
	m₁	m₂	ρ	θ	Year
	6m9	8m8	1.9"	-	2019



Robert Zebahl
70mm f/5.7, 133x Border observation! Companion is temporarily visible in the correct position angle as an extremely dim brightening of the first diffraction ring of the primary component.

BU 1077 (**)

Name:	BU1077, alpha UMa, 50 UMa, Dubhe
Type:	**
Constellation:	UMa
Coordinates:	11h03m43.84s / +61°45'04.00"

Components:
		m₁	m₂	ρ	θ	Year
	AB	2m0	5m0	0.8"	342°	2017
	AC	2m0	7m2	370.0"	205°	2015



Robert Zebahl
70mm f/5.7, 22x AC: 2020-04-07: Very wide, uneven & inconspicuous pair. A appeared white-yellowish, for B I could not detect any color.

COU 240 (**)

Name:	COU240
Type:	**
Constellation:	Peg
Coordinates:	22h56m23.71s / +22°57'21.20"

Components:
	m₁	m₂	ρ	θ	Year
	7m7	8m8	0.8"	289°	2017

Robert Zebahl
152mm f/5.9, 300x Borderline observation with rather less good seeing. The fainter companion could be detected in the correct position angle to some extent as a small bulge in the diffraction disk.

CSN 12 (**)

Name:	CSN12
Type:	**
Constellation:	Aql
Coordinates:	19h16m55.23s / +05°10'07.10"

Components:
		m₁	m₂	ρ	θ	Year
	AN	4m7	5m8	9.1"	285°	2000

Robert Zebahl
70mm f/5.7, 22x 2019-07-03: Absolutely no star with the given magnitude visible at this position. An error in the WDS or is this a variable one?

delta Cep (**)

Name:	delta Cep, 27 Cep
Type:	**
Constellation:	Cep
Coordinates:	22h29m10.25s / +58°24'54.70"

Components:
		m₁	m₂	ρ	θ	Year
BU702	AB	4m2	13m0	21.5"	282°	2015
STFA58	AC	4m2	6m1	41.0"	191°	2018
DAL45	AD	4m2	13m9	109.0"	39°	2015
DAL45	DE	13m9	14m0	1.4"	23°	2008

Robert Zebahl
55mm f/9.1, 27x, Bortle 6 AC: At 27x easy to separate, rather wide apart with clear difference in brightness. At 38x the colors are slightly better visible: A shines in bright orange, C appears rather grey-bluish.
B 16x70, Bortle 7 AC: 2020-09-20: Nice separation with noticeable difference in brightness. Slightly yellowish & white-bluish.
80mm f/6.25, 25x AC: Obvious difference in brightness and color. Brighter component slightly orange, weaker bluish. Could be Albireo's little brother ;)

EHR 16 (**)

Name:	EHR16, lambda Aql, 16 Aql
Type:	**
Constellation:	Aql
Coordinates:	19h06m14.95s / -04°52'56.40"

Components:
		m₁	m₂	ρ	θ	Year
	AB	3m5	7m5	12.5"	30°	2009

Robert Zebahl
70mm f/5.7, 133x 2020-07-29: The companion can be seen to some extent as an elongated brightening in the first diffraction ring of the primary component. It still appears intermittently as a fragment of the diffraction ring.

ENG 72 (**)

Name:	ENG72, 29 Cyg
Type:	**
Constellation:	Cyg
Coordinates:	20h14m31.98s / +36°48'22.10"

Components:
		m₁	m₂	ρ	θ	Year
	AB	5m0	6m7	215.3"	155°	2016

Robert Zebahl
B 16x70, Bortle 7 2020-09-20: Widely separated pair in nice star field with moderate difference in brightness and beautiful color contrast: whitish & yellow-orange.

epsilon Lyr (**)

Name:	epsilon Lyr
Type:	**
Constellation:	Lyr
Coordinates:	18h44m20.34s / +39°40'12.40"

Components:
		m₁	m₂	ρ	θ	Year
STFA37	AB-CD	4m7	4m6	209.5"	172°	2016
STFA37	AI	5m2	10m1	149.5"	137°	2015
STF2382, 4 Lyr, epsilon 1 Lyr	AB	5m2	6m1	2.2"	346°	2018
STF2383, 5 Lyr, epsilon 2 Lyr	CD	5m2	5m4	2.4"	75°	2018



Robert Zebahl
55mm f/9.1, 59x STF2382 (AB): At 42x slightly elongated, at 59x elongated and obviously notched.
55mm f/9.1, 59x STF2383 (CD): At 42x clearly elongated, but without any visible notch. At 59x split with touching diffraction disks.
70mm f/5.7, 57x STF2382 (AB): Obviously seen as figure '8'.
70mm f/5.7, 57x STF2383 (CD): Split, but extremely tight with almost touching diffraction disks.
102mm f/11, 125x, Bortle 6, SQM-L 19.4 Stunning view of the components A-D and I!

ES 4 (**)

Name:	ES4
Type:	**
Constellation:	And
Coordinates:	01h31m05.02s / +43°37'14.60"

Components:
	m₁	m₂	ρ	θ	Year
	8m1	9m1	2.8"	101°	2016

Robert Zebahl
70mm f/5.7, 128x Not split. I probably didn't recognised the fainter component. The angular distance shouldn't be a problem.

ES 593 (**)

Name:	ES593
Type:	**
Constellation:	Lyn
Coordinates:	08h16m42.64s / +40°53'13.90"

Components:
		m₁	m₂	ρ	θ	Year
	AB	9m3	10m9	20.8"	345°	2017
	AC	9m3	11m3	17.8"	334°	2017
	BC	9m9	10m1	4.8"	211°	2017

Robert Zebahl
70mm f/5.7, 100x, Bortle 6, NELM 5m0+ 2020-04-14: At 100x and 133x, the pair AB is easy to separate, whereas B appeared pretty faint. On closer look the pair BC appeared slightly elongated.

ES 2076 (**)

Name:	ES2076
Type:	**
Constellation:	And
Coordinates:	23h00m56.79s / +37°13'54.10"

Components:
	m₁	m₂	ρ	θ	Year
	9m5	9m5	1.8"	162°	2016

Robert Zebahl
102mm f/11, 125x, Bortle 6-, SQM-L 19.0 Observation under urban conditions (Bortle 6-, SQM-L 19.0). Too faint to separate.

eta Cas (**)

Name:	eta Cas, 24 Cas
Type:	**
Constellation:	Cas
Coordinates:	00h49m06.29s / +57°48'54.70"

Components:
		m₁	m₂	ρ	θ	Year
STF60	AB	3m5	7m4	13.4"	326°	2019
STF60	AC	3m5	11m4	225.0"	260°	2000
STF60	AD	3m5	12m8	189.4"	354°	2011
STF60	AE	3m5	10m2	75.6"	126°	2015
STF60	AF	3m5	11m5	378.3"	276°	2000
STF60	AG	3m5	9m5	419.7"	259°	2012
STF60	AH	3m5	8m4	701.1"	355°	2012
SMR2	AI	3m5	11m6	90.3"	73°	2012
SMR2	AJ	3m5	12m3	237.1"	262°	2012



Robert Zebahl
70mm f/5.7, 57x AB: Easy to split with big difference in brightness. Fainter component appeared deep orange to slightly red colored, brighter component tends to be more slightly yellowish.

gamma Ari (**)

Name:	gamma Ari, STF180
Type:	**
Constellation:	Ari
Coordinates:	01h53m31.76s / +19°17'38.60"

Components:
		m₁	m₂	ρ	θ	Year
	AB	4m5	4m6	7.4"	2°	2018

Robert Zebahl
8" f/6, 80x, Bortle 3-, SQM-L 21.3 Nice, obvious double star. Both components have similar brightness and appeared white.

gamma Her (**)

Name:	gamma Her, 20 Her
Type:	**
Constellation:	Her
Coordinates:	16h21m55.24s / +19°09'10.90"

Components:
		m₁	m₂	ρ	θ	Year
DRS58	AD	2m9	8m1	8.3"	176°	2010
SHJ227	AB	3m8	10m1	43.3"	226°	2013
SHJ227	BC	10m1	13m3	82.0"	298°	2015

Robert Zebahl
102mm f/11, 280x, Bortle 6, SQM-L 19.4 AD: It is already the second attempt at this double star. There was nothing perceptible at the best of intentions, which indicates a double star.

H 1 48 (**)

Name:	H1 48
Type:	**
Constellation:	Cep
Coordinates:	21h13m42.46s / +64°24'15.10"

Components:
	m₁	m₂	ρ	θ	Year
	7m2	7m3	0.7"	244°	2018



Robert Zebahl
152mm f/5.9, 270x, Bortle 6- Clearly elongated, of equal brightness with partly visible, slight notching.

H 5 12 (**)

Name:	H5 12, 9 Ari, lambda Ari
Type:	**
Constellation:	Ari
Coordinates:	01h57m55.71s / +23°35'45.80"

Components:
		m₁	m₂	ρ	θ	Year
	AB	4m8	6m7	37.3"	48°	2018

Robert Zebahl
B 8x44 2020-11-25: Easily separable with noticeable difference in brightness. Primary component appeared slightly yellowish with dim companion.
70mm f/5.7, 15x, Bortle 6- Easy to split with large distance and difference in brightness.

H 5 17 (**)

Name:	H5 17, pi And, 29 And
Type:	**
Constellation:	And
Coordinates:	00h36m52.84s / +33°43'09.70"

Components:
		m₁	m₂	ρ	θ	Year
	AB	4m4	7m1	35.8"	174°	2018
	AC	4m4	13m0	55.1"	355°	2013

Robert Zebahl
B 8x44 AB: 2020-11-25: Not separable. The faint companion was probably outshone by the bright primary component.
102mm f/11, 28x, Seeing 3/5 AB: 2020-11-02: Quite large separation and large difference in brightness. A: white-yellowish, B: slightly bluish.

H 5 82 (**)

Name:	H5 82
Type:	**
Constellation:	Cas
Coordinates:	00h47m24.62s / +51°05'45.90"

Components:
		m₁	m₂	ρ	θ	Year
	AB	8m0	8m3	56.8"	75°	2018

Robert Zebahl
70mm f/5.7, 26x, Bortle 7 Almost equally bright components with large angular distance.

HJ 467 (**)

Name:	HJ467
Type:	**
Constellation:	Leo
Coordinates:	09h33m47.51s / +26°21'27.30"

Components:
	m₁	m₂	ρ	θ	Year
	10m0	11m0	8.8"	277°	2015

Robert Zebahl
152mm f/5.9, 129x, Bortle 6-, SQM-L 19.2, Seeing 2-3/5 2020-04-23: Split with visible difference in brightness. Unspectacular.

HJ 2010 (**)

Name:	HJ2010
Type:	**
Constellation:	And
Coordinates:	01h02m47.00s / +47°41'55.40"

Components:
	m₁	m₂	ρ	θ	Year
	8m3	9m7	9.9"	271°	2016

Robert Zebahl
102mm f/11, 28x, Seeing 3/5 2020-11-02: Clearly separated, significant difference in brightness, still relatively close together. The components appeared slightly different in color: slightly yellowish & slightly bluish.

HJ 2477 & HU 628 (**)

Name:	HJ2477 & HU628, iota UMa, 9 UMa, Talitha
Type:	**
Constellation:	UMa
Coordinates:	08h59m12.45s / +48°02'30.60"

Components:
		m₁	m₂	ρ	θ	Year
HJ2477	A-BC	3m1	9m2	2.4"	90°	2017
HU628	BC	9m9	10m1	0.9"	206°	2017



Robert Zebahl
152mm f/5.9, 300x, Bortle 6, SQM-L 19.4, Seeing 3/5 A-BC: 2020-04-24: The seeing (3/5) was not good enough for a split.

HJ 3288 (**)

Name:	HJ3288
Type:	**
Constellation:	Gem
Coordinates:	07h02m18.43s / +12°34'54.20"

Components:
	m₁	m₂	ρ	θ	Year
	7m3	8m7	38.5"	247°	2015

Robert Zebahl
70mm f/5.7, 22x, Bortle 6 Easy to separate with moderate angular distance and a significant difference in brightness. Slight difference in color: white-yellowish, slightly orange. Nice view together with the double star STF1007 and HD52976, which appears in a bright orange. Sketched together with STF1007.

HJ 3945 & SHY 508 (**)

Name:	HJ3945 & SHY508, 145 CMa, Winter Albireo
Type:	**
Constellation:	CMa
Coordinates:	07h16m36.84s / -23°18'56.10"

Components:
		m₁	m₂	ρ	θ	Year
HJ3945, Winter Albireo	AB	5m0	5m8	26.8"	50°	2015
SHY508	BC	5m8	6m8	999.9"	165°	1999

Robert Zebahl
120mm f/5, 23x AB: Evident, easy to split at large angular distance. Brighter component appeared very orange, fainter one bluish.

HLD 56 (**)

Name:	HLD56
Type:	**
Constellation:	And
Coordinates:	22h59m42.14s / +41°49'25.20"

Components:
	m₁	m₂	ρ	θ	Year
	9m3	9m4	1.3"	92°	2016

Robert Zebahl
102mm f/11, 160x, Bortle 6-, SQM-L 19.0 At 125x clearly visible as figure '8' with slight difference in brightness. Almost split at 160x.

HO 306 (**)

Name:	HO306
Type:	**
Constellation:	And
Coordinates:	00h48m06.71s / +25°32'54.30"

Components:
	m₁	m₂	ρ	θ	Year
	9m6	9m9	1.5"	159°	2016

Robert Zebahl
102mm f/11, 160x, Bortle 6-, SQM-L 19.0 Pretty faint and tight with visible difference in brightness.

HU 103 (**)

Name:	HU103
Type:	**
Constellation:	Per
Coordinates:	03h45m22.61s / +49°51'42.40"

Components:
		m₁	m₂	ρ	θ	Year
	AB	8m7	8m9	1.2"	203°	2018

Robert Zebahl
152mm f/5.9, 225x, Bortle 6-, SQM-L 19.0 At 100x slightly elongated, at 129x elongated, notched. At 225x clearly separated, but tight with little difference in brightness.

HU 544 (**)

Name:	HU544
Type:	**
Constellation:	Per
Coordinates:	03h15m48.70s / +50°57'21.20"

Components:
	m₁	m₂	ρ	θ	Year
	6m7	8m2	1.7"	103°	2018



Robert Zebahl
70mm f/5.7, 133x, Bortle 6, SQM-L 19.2 Clearly seen as figure '8' with noticeable difference in brightness.
152mm f/5.9, 129x, Bortle 6-, SQM-L 19.0 Wonderfully separated in equally beautiful star surroundings! Clear difference in brightness visible. To the east there is a brighter star, which shines yellowish-orange. HU544 itself seems rather cool in color.

HU 1338 & STF 1448 (**)

Name:	HU1338 & STF1448, WDS10344+2136
Type:	**
Constellation:	Leo
Coordinates:	10h34m23.24s / +21°35'36.40"

Components:
		m₁	m₂	ρ	θ	Year
HU1338	AB	7m5	13m6	3.5"	184°	1920
STF1448	AC	7m5	9m6	10.9"	259°	2011

Robert Zebahl
70mm f/5.7, 44x, Bortle 6 STF1448 (AC): 2020-04-10: Moderate separation, significant difference in brightness. A shows a beautiful bright orange, C as a faint greyish companion.

IC 5006 (**)

../dss/dss2red_202347.00_+062655.00_5_web.jpg

Image source: DSS II (red) - 5×5'

Name:	IC5006
Type:	**
Constellation:	Aql
Coordinates:	20h23m47.00s / +06°26'55.00"

Components:
	m₁	m₂	ρ	θ	Year
	14m5	15m1	6.0"	210.0°	-

Robert Zebahl
8" f/6, 150x, Bortle 4, NELM 5m7+, SQM-L 20.9 Conditions in the target region: NELM 5m4+, SQM-L 20.6 I saw this 'double star' with averted vision just as a faint, stellar brightening.	MODERATE

KR 11 (**)

Name:	KR11
Type:	**
Constellation:	Cas
Coordinates:	01h19m40.95s / +61°34'44.40"

Components:
	m₁	m₂	ρ	θ	Year
	9m6	9m7	2.0"	59°	2017

Robert Zebahl
152mm f/5.9, 129x Rather faint double star. Easily split with equally bright components.

KR 60 (**)

Name:	KR60, DO Cep, Kruger 60
Type:	**
Constellation:	Cep
Coordinates:	22h27m59.20s / +57°41'43.80"

Components:
		m₁	m₂	ρ	θ	Year
	AB	9m9	11m4	1.5"	266°	2016


A detailed article about Kruger 60 was published in the "Journal of Double Star Observations" by Wilfried R.A. Knapp and John Nanson. Another article is about the origin of the comet 2I/Borisov (C/2019 Q4) in connection with Kruger 60.
Robert Zebahl
152mm f/5.9, 150x, Bortle 6- Observed at magnifications between 129x and 300x. The seeing and transparency (Bortle 6-) were only average. The rather faint B component seemed to appear in few moments.
152mm f/5.9, 150x, Bortle 6, SQM-L 19.1, Seeing 3/5 The seeing was more average (3/5). Observation under suburban conditions (Bortle 6, SQM-L 19.1). Initially observed at 270x, later at 300x. The extremely faint companion was always visible at the same position if the air was steady enough. Difficult because of the low magnitude!

LEP 103 (**)

Name:	LEP103
Type:	**
Constellation:	Cep
Coordinates:	21h54m14.50s / +66°43'54.20"

Components:
	m₁	m₂	ρ	θ	Year
	7m2	8m0	4.1"	213°	2000

Robert Zebahl
152mm f/5.9, 100x, Bortle 4, SQM-L 21.0 The brightness of this double star does not match the data in the WDS. I also couldn't separate anything here. A mistake in the WDS?

LSL 1 (**)

Name:	LSL1, Lassell 1
Type:	**
Constellation:	Cyg
Coordinates:	21h34m45.16s / +32°04'42.60"

Components:
		m₁	m₂	ρ	θ	Year
	AB	10m6	11m7	82.1"	82°	2015
	AC	10m6	12m1	106.1"	127°	2015
	AD	10m6	11m9	21.2"	134°	2015
	AE	10m6	13m5	10.5"	331°	2015
	BF	11m7	12m1	18.4"	210°	2015
	CG	12m1	14m4	11.5"	199°	2015

Robert Zebahl
152mm f/5.9, 180x Comparatively wide pairs with rather faint components. Observation at nearly full moon. Components A & D easy, B relatively well and C & F quite faint. Components E & G not visible. Overall unspectacular under these conditions.

mu Boo (**)

Name:	mu Boo, 51 Boo, Alkalurops
Type:	**
Constellation:	Boo
Coordinates:	15h24m29.54s / +37°22'37.10"

Components:
		m₁	m₂	ρ	θ	Year
CHR181, mu 1 Boo	Aa-Ab	4m3	None	0.1"	188°	2012
STFA28, mu 1 Boo	AB	4m3	7m1	109.0"	172°	2018
STF1938, mu 2 Boo	Ba-Bb	7m1	7m6	2.3"	3°	2019



Robert Zebahl
B 8x40, Bortle 7, NELM 5m0, SQM-L 19.2 STFA28 (AB): Easily split with obvious difference in brightness.
70mm f/5.7, 22x, Bortle 6, SQM-L 19.2 STFA28 (AB): Evident, very wide apart and unequal. A: white-yellowish, B: grey.
102mm f/11, 125x, Bortle 6-, SQM-L 19.2 STF1938 (Ba-Bb): Beautiful view! This triple system includes STFA 28 and STF 1938.
120mm f/5, 23x, Bortle 6, NELM 5m0+, SQM-L 19.4 STFA28 (AB): Easy to split with large angular distance and noticeable difference in brightness.

mu Cyg (**)

Name:	mu Cyg, 78 Cyg, STF2822
Type:	**
Constellation:	Cyg
Coordinates:	21h44m08.57s / +28°44'33.40"

Components:
		m₁	m₂	ρ	θ	Year
	AB	4m8	6m2	1.6"	321°	2018
	AD	4m8	6m9	196.9"	44°	2014



Robert Zebahl
70mm f/5.7, 128x AB: At 128x I was able to see this double at least elongated.
8" f/6, 171x, Bortle 5, NELM 5m7, SQM-L 20.6 AB: Quite well split with noticeable fainter component.

mu Dra (**)

Name:	mu Dra, 21 Dra, Alrakis, Arrakis
Type:	**
Constellation:	Dra
Coordinates:	17h05m20.20s / +54°28'14.30"

Components:
		m₁	m₂	ρ	θ	Year
STF2130	AB	5m7	5m7	2.5"	2°	2018
BU1088	AC	5m7	13m7	12.2"	174°	2015



Robert Zebahl
102mm f/11, 125x, Bortle 6 AB: Easy to separate. Beautiful sight. Components equally bright with no discernible color difference.

NGC 6933 (**)

../dss/dss2blue_203338.50_+072325.00_5_web.jpg

Image source: DSS II (blue) - 5×5'

Name:	NGC6933
Type:	**
Constellation:	Del
Coordinates:	20h33m38.50s / +07°23'25.00"

Components:
	m₁	m₂	ρ	θ	Year
	10m8	12m5	30.0"	215.0°	-


I guess it is just an optical double star. At least I could not find any entry in the 'Washington Double Star Catalog' (WDS). Located west of the globular cluster NGC6935 in an angular distance of less than 10 arcminutes.
Robert Zebahl
8" f/6, 80x, Bortle 4, NELM 5m7+, SQM-L 20.9 Conditions in the target region: NELM 5m4+, SQM-L 20.6 Easily split, but rather unspectacular. Just for completeness ;-)	EASY

S 430 (**)

Name:	S430
Type:	**
Constellation:	Per
Coordinates:	03h38m18.83s / +44°48'06.50"

Components:
		m₁	m₂	ρ	θ	Year
	AB	7m2	7m5	41.0"	96°	2017

Robert Zebahl
B 16x70, Bortle 6, SQM-L 19.2 2020-11-07: Easily separated at moderate separation, nearly equal in brightness. White-yellowish & white-bluish.

S 445 & ES 2604 (**)

Name:	S445 & ES2604, WDS04210+5015
Type:	**
Constellation:	Per
Coordinates:	04h20m57.50s / +50°15'17.40"

Components:
		m₁	m₂	ρ	θ	Year
S445	AB	7m3	8m2	71.0"	328°	2017
S445	AC	7m3	9m3	150.3"	263°	2016
ES2604	AD	7m3	14m8	24.8"	321°	2015
ES2604	BE	8m2	11m2	23.3"	263°	2015

Robert Zebahl
B 16x70, Bortle 6, SQM-L 19.2 2020-11-07: Together with the uneven double star STF519 in one field of view. The three widely separated, differently bright components A, B and C form a prominent triangle, with A appearing orange. Very beautiful!
102mm f/11, 28x, Bortle 7- 2020-11-08: Components A, B & C visible as a prominent triangle of different brightness. Component A appears slightly yellowish. Together with the northern located double star STF519 in one field of view. Very nice!

S 612 & ARN 3 (**)

Name:	S612 & ARN3, 42 LMi
Type:	**
Constellation:	LMi
Coordinates:	10h45m51.91s / +30°40'56.60"

Components:
		m₁	m₂	ρ	θ	Year
S612	AB	5m3	7m8	196.2"	174°	2015
ARN3	AC	5m3	8m3	424.6"	94°	2013

Robert Zebahl
70mm f/5.7, 22x, Bortle 6 2020-04-11: Wide, striking triple system, which can be well observed with binoculars. A: quite bright, rather white, B: slightly orange, C: tending to orange.

S 617 (**)

Name:	S617
Type:	**
Constellation:	Leo
Coordinates:	10h53m24.96s / -02°15'18.80"

Components:
	m₁	m₂	ρ	θ	Year
	6m2	8m7	35.2"	179°	2017

Robert Zebahl
70mm f/5.7, 22x, Seeing 3-4/5 2020-03-31: Clearly separated with distinct difference in brightness. Color wise unremarkable. Nearby there is a brighter star.

S 656 (**)

Name:	S656
Type:	**
Constellation:	Boo
Coordinates:	13h50m23.51s / +21°16'35.80"

Components:
	m₁	m₂	ρ	θ	Year
	6m9	7m4	86.2"	209°	2018

Robert Zebahl
B 8x40 2020-04-05: Wide, medium bright pair. Primary component appeared slightly orange, the companion greyish. The double star is in close vicinity to the star 6 Boo, which shines in a pale orange.
70mm f/5.7, 22x, Bortle 6 2020-04-24: Widely separated with little difference in brightness. Both components appeared slightly yellowish. Standing close to 6 Boo, which also shines in a slight yellow.

SHJ 70 (**)

Name:	SHJ70, 15 Gem
Type:	**
Constellation:	Gem
Coordinates:	06h27m46.58s / +20°47'22.60"

Components:
		m₁	m₂	ρ	θ	Year
	AB	6m7	8m2	25.0"	202°	2017
	AC	6m7	12m7	85.6"	35°	2015

Robert Zebahl
B 16x70 AB: 2021-02-22: Clearly split with noticeable difference in brightness. Pale orange with much fainter companion. Together with Nu Gem & 16 Gem in a nice curved star chain.

SHJ 145 (**)

Name:	SHJ145, delta Crv, 7 Crv, Algorab
Type:	**
Constellation:	Crv
Coordinates:	12h29m51.86s / -16°30'55.60"

Components:
		m₁	m₂	ρ	θ	Year
	AB	3m0	8m5	24.0"	215°	2015

Robert Zebahl
70mm f/5.7, 47x, Bortle 6, SQM-L 19.5 Large difference in brightness and pretty wide apart. Primary component appeared white-bluish. The B component was too faint for seeing colors.

SHJ 146 (**)

Name:	SHJ146
Type:	**
Constellation:	Vir
Coordinates:	12h31m14.61s / +01°19'37.00"

Components:
		m₁	m₂	ρ	θ	Year
	AB	7m7	8m7	49.5"	290°	2017

Robert Zebahl
70mm f/5.7, 33x, Bortle 6, SQM-L 19.5 Visible difference in brightness and color. I couldn't precisely define the colors itself, but A appeared rather orange, B rather bluish.
102mm f/11, 28x Pretty wide pair with visible difference in brightness and lovely color contrast. A: pale orange, B: light blue.

SHJ 191 (**)

Name:	SHJ191
Type:	**
Constellation:	Boo
Coordinates:	14h59m34.58s / +53°51'36.70"

Components:
	m₁	m₂	ρ	θ	Year
	6m9	7m6	40.4"	342°	2018

Robert Zebahl
B 8x40 2020-04-05: Easily separable with clearly visible difference in brightness. Nice separation of the components. Colors not perceptible.
55mm f/9.1, 27x 2020-04-05: Widely separated pair with rather small difference in brightness. Primary component: creamy white, companion: slightly orange.
70mm f/5.7, 22x, Bortle 6 2020-04-24: Widely separated with a moderate difference in brightness. Striking. The brighter component appeared yellowish-orange, the fainter one somehow darker and occasionally also cooler.

sigma CrB (**)

Name:	sigma CrB, 17 CrB, STF2032
Type:	**
Constellation:	CrB
Coordinates:	16h14m40.85s / +33°51'31.00"

Components:
		m₁	m₂	ρ	θ	Year
	AB	5m6	6m5	7.2"	239°	2019



Robert Zebahl
70mm f/5.7, 22x, Bortle 4, SQM-L 20.9 At 22x clearly separated, but very close with a clear difference in brightness. At 57x easy without any noticeable difference in color.

SIN 128 (**)

Name:	SIN128
Type:	**
Constellation:	Aur
Coordinates:	06h01m14.73s / +31°32'28.10"

Components:
		m₁	m₂	ρ	θ	Year
	AC	7m3	7m6	2.6"	193°	1985

Robert Zebahl
70mm f/5.7, 133x Even at high magnification there are no indications of a double star. Also the brightness seemed to be less than stated!?

STF 7 (**)

Name:	STF7
Type:	**
Constellation:	Cas
Coordinates:	00h11m38.91s / +55°57'40.90"

Components:
	m₁	m₂	ρ	θ	Year
	8m0	8m5	1.3"	210°	2017

Robert Zebahl
152mm f/5.9, 210x Clearly separated with rather close components. Slightly unequal. Pretty double.

STF 12 (**)

Name:	STF12, 35 Psc
Type:	**
Constellation:	Psc
Coordinates:	00h14m58.84s / +08°49'15.50"

Components:
	m₁	m₂	ρ	θ	Year
	6m1	7m5	11.5"	148°	2018

Robert Zebahl
70mm f/5.7, 22x, Bortle 6, SQM-L 19.1 At 22x pretty bright but uneven pair with relatively close components. At 44x the brighter component looked slightly yellowish, the fainter one slightly bluish. The double star could be observed together with STF22 (38 Psc) in the same field of view and stands in nice contrast to it.

STF 22 (**)

Name:	STF22, 38 Psc
Type:	**
Constellation:	Psc
Coordinates:	00h17m24.50s / +08°52'34.80"

Components:
		m₁	m₂	ρ	θ	Year
	AB-C	7m1	7m7	3.9"	235°	2017
	AB-D	7m1	11m5	66.8"	151°	2005

Robert Zebahl
70mm f/5.7, 44x, Bortle 6, SQM-L 19.1 AB-C: At 44x separated with almost touching diffraction disks and small difference in brightness. At 57x clearly separated, but still quite close together. It stands in beautiful contrast to the nearby double star STF12 (35 Psc).

STF 24 (**)

Name:	STF24
Type:	**
Constellation:	And
Coordinates:	00h18m30.59s / +26°08'25.10"

Components:
	m₁	m₂	ρ	θ	Year
	7m8	8m4	5.1"	247°	2017

Robert Zebahl
70mm f/5.7, 66x, Bortle 6- Well split with visible difference in brightness.

STF 28 & FYM 12 (**)

Name:	STF28 & FYM12, WDS00239+2930
Type:	**
Constellation:	And
Coordinates:	00h23m53.23s / +29°30'09.10"

Components:
		m₁	m₂	ρ	θ	Year
STF28	AB	8m3	8m6	33.2"	224°	2016
FYM12	AC	8m3	8m9	145.9"	137°	2016

Robert Zebahl
102mm f/11, 28x, Seeing 3/5 STF28 (AB): 2020-11-02: At 28x beautifully separated, moderately bright with slight difference in brightness. A subtle color difference was visible: pale yellow-orange & pale white-bluish. At 62x a very similar color impression was seen. The double star forms an acute triangle with a faint field star located southeast.

STF 33 (**)

Name:	STF33
Type:	**
Constellation:	And
Coordinates:	00h30m58.47s / +34°05'53.90"

Components:
	m₁	m₂	ρ	θ	Year
	8m8	8m9	2.8"	213°	2017

Robert Zebahl
70mm f/5.7, 128x, Bortle 4-, SQM-L 20.9 Components equally bright, easy to split.

STF 40 (**)

Name:	STF40
Type:	**
Constellation:	And
Coordinates:	00h35m09.63s / +36°49'56.20"

Components:
		m₁	m₂	ρ	θ	Year
	AB	6m7	8m5	11.8"	313°	2018
	AC	6m7	12m8	25.4"	121°	2015

Robert Zebahl
102mm f/11, 62x, Seeing 3/5 AB: 2020-11-02: At 28x instantly separable, medium bright with a clear difference in brightness. Component A showed up in a bright orange, B rather colorless. At 62x very nice sight. A: bright orange, B: grey-bluish.

STF 46 (**)

Name:	STF46, 55 Psc
Type:	**
Constellation:	Psc
Coordinates:	00h39m55.57s / +21°26'18.60"

Components:
	m₁	m₂	ρ	θ	Year
	5m6	8m5	6.6"	195°	2015

Robert Zebahl
70mm f/5.7, 44x, Bortle 6, SQM-L 19.1 Clearly separated, but large difference in brightness. The companion appeared only as a tiny, faint star. The primary component sparkled in light orange.

STF 47 & BU 1348 (**)

Name:	STF47 & BU1348, WDS00403+2403
Type:	**
Constellation:	And
Coordinates:	00h40m19.78s / +24°03'14.00"

Components:
		m₁	m₂	ρ	θ	Year
STF47	AB	7m2	8m8	16.6"	205°	2015
BU1348	AC	7m2	11m1	46.5"	233°	2015

Robert Zebahl
102mm f/11, 28x, Seeing 3/5 STF47 (AB): 2020-11-02: Easy to separate with a clear difference in brightness. Moderately conspicuous. The primary component appeared whitish with a faint companion.

STF 48 (**)

Name:	STF48
Type:	**
Constellation:	Cas
Coordinates:	00h42m40.01s / +71°21'57.30"

Components:
		m₁	m₂	ρ	θ	Year
	AB	7m8	8m1	5.5"	334°	2016

Robert Zebahl
70mm f/5.7, 57x, Bortle 6- At 22x almost split, clearly elongated, notched. At 31x split, but very close together, almost equally bright. At 57x easily separable with very small difference in brightness. The fainter companion appeared slightly orange.

STF 52 (**)

Name:	STF52, V355 And
Type:	**
Constellation:	And
Coordinates:	00h44m11.27s / +46°14'08.20"

Components:
	m₁	m₂	ρ	θ	Year
	7m9	8m9	1.4"	2°	2017

Robert Zebahl
102mm f/11, 187x, Seeing 3/5 2020-11-02: At 171x to some extent, at 187x and 224x slightly elongated. The seeing was only mediocre.

STF 55 (**)

Name:	STF55
Type:	**
Constellation:	And
Coordinates:	00h44m22.95s / +33°37'05.60"

Components:
	m₁	m₂	ρ	θ	Year
	8m3	8m9	2.3"	331°	2016

Robert Zebahl
70mm f/5.7, 128x, Bortle 7+, SQM-L 18.8 Well split with noticeable difference in brightness.

STF 59 (**)

Name:	STF59
Type:	**
Constellation:	Cas
Coordinates:	00h47m59.03s / +51°26'41.20"

Components:
		m₁	m₂	ρ	θ	Year
	AB	7m2	8m1	2.4"	151°	2018

Robert Zebahl
70mm f/5.7, 100x, Bortle 7 At 57x elongated, at 100x barely, at 128x clearly split with noticeable difference in brightness.

STF 65 (**)

Name:	STF65
Type:	**
Constellation:	Cas
Coordinates:	00h52m45.61s / +68°51'59.30"

Components:
	m₁	m₂	ρ	θ	Year
	8m0	8m0	3.2"	220°	2017

Robert Zebahl
70mm f/5.7, 57x, Bortle 7 Clearly split with equally bright components.

STF 72 (**)

Name:	STF72
Type:	**
Constellation:	And
Coordinates:	00h54m37.50s / +39°10'09.70"

Components:
	m₁	m₂	ρ	θ	Year
	8m4	9m3	23.3"	173°	2015

Robert Zebahl
152mm f/5.9, 22x, Bortle 6, SQM-L 19.3 Easy with moderate difference in brightness. Both components appeared orange, the fainter one slightly more intense. The color was well visible at 69x.

STF 73 (**)

Name:	STF73, 36 And
Type:	**
Constellation:	And
Coordinates:	00h54m58.02s / +23°37'42.40"

Components:
		m₁	m₂	ρ	θ	Year
	AB	6m1	6m5	1.1"	334°	2018

Robert Zebahl
102mm f/11, 125x, Bortle 6-, SQM-L 19.0 Clearly visible as figure '8' with a rather small difference in brightness.
152mm f/5.9, 300x Split with little gap in between and little difference in brightness. Seeing was not really good.

STF 88 (**)

Name:	STF88, psi 1 Psc, 74 Psc
Type:	**
Constellation:	Psc
Coordinates:	01h05m40.93s / +21°28'23.60"

Components:
		m₁	m₂	ρ	θ	Year
	AB	5m3	5m5	29.2"	160°	2018
	AC	5m3	10m7	90.4"	124°	2017
	BC	5m5	10m7	68.5"	109°	2017

Robert Zebahl
B 8x44 AB: 2020-11-25: Beautiful! Very nicely separated with little difference in brightness. White-yellowish & white-bluish. Separable even without using a tripod, but difficult.

STF 90 (**)

Name:	STF90, 77 Psc
Type:	**
Constellation:	Psc
Coordinates:	01h05m49.22s / +04°54'31.20"

Components:
		m₁	m₂	ρ	θ	Year
	AB	6m4	7m3	32.7"	84°	2018
	AC	6m4	13m2	157.6"	290°	2015
	AD	6m4	14m6	42.0"	323°	2015
	AE	6m4	14m4	90.4"	352°	2015

Robert Zebahl
B 8x44 AB: 2020-11-25: On this evening nicely visible together with Mars in one field of view. The double star forms a nice triangle with two other stars. It is clearly separable with a fainter companion. A appeared rather cool in color, the companion somewhat warmer. Very nice sight.

STF 98 (**)

Name:	STF98
Type:	**
Constellation:	Psc
Coordinates:	01h12m52.98s / +32°04'31.70"

Components:
		m₁	m₂	ρ	θ	Year
	AB	7m0	8m1	20.0"	250°	2018

Robert Zebahl
70mm f/5.7, 22x, Bortle 6, SQM-L 19.1 Easy to separate at 22x, clear difference in brightness at moderate distance. In terms of color, the two components appeared slightly different. At 44x A appeared white-yellowish, B slightly reddish.

STF 102 (**)

Name:	STF102
Type:	**
Constellation:	And
Coordinates:	01h17m47.96s / +49°00'30.50"

Components:
		m₁	m₂	ρ	θ	Year
	AB	7m3	9m2	0.5"	271°	2016
	AB-C	7m2	8m8	10.0"	223°	2015
	AB-D	7m2	10m8	23.6"	58°	2015
	CD	8m8	10m8	33.5"	54°	2015
	DE	10m8	10m2	98.5"	356°	2015

Robert Zebahl
102mm f/11, 62x, Seeing 3/5 AB-C: 2020-11-02: At 28x clearly separated, fairly close together with a clear difference in brightness. The close pair AB appeared whitish with faint companion C. At 62x AB appeared white-yellowish, C grey-blue.

STF 104 (**)

Name:	STF104
Type:	**
Constellation:	And
Coordinates:	01h16m57.09s / +38°27'38.70"

Components:
	m₁	m₂	ρ	θ	Year
	8m0	9m8	13.4"	323°	2015

Robert Zebahl
152mm f/5.9, 69x, Bortle 6, SQM-L 19.3 Easy, rather close pair, but with a clear difference in brightness. Primary component appeared slightly orange, companion slightly grey-bluish.

STF 105 (**)

Name:	STF105
Type:	**
Constellation:	Cas
Coordinates:	01h18m57.50s / +66°09'28.00"

Components:
		m₁	m₂	ρ	θ	Year
	AB	8m8	9m8	3.0"	185°	2016

Robert Zebahl
70mm f/5.7, 100x, Bortle 7 Clearly split with visible difference in brightness.

STF 108 (**)

Name:	STF108
Type:	**
Constellation:	And
Coordinates:	01h18m47.00s / +37°23'10.60"

Components:
	m₁	m₂	ρ	θ	Year
	6m5	9m6	6.4"	62°	2017

Robert Zebahl
120mm f/5, 75x, Bortle 6, SQM-L 19.1 Easily split with big difference in brightness.
152mm f/5.9, 69x, Bortle 6, SQM-L 19.3 Easy and pretty uneven. Primary component appeared slightly yellowish.

STF 136 (**)

Name:	STF136, 100 Psc
Type:	**
Constellation:	Psc
Coordinates:	01h34m51.61s / +12°33'31.20"

Components:
		m₁	m₂	ρ	θ	Year
	AB	7m3	8m3	15.7"	77°	2016
	AC	7m3	13m6	76.9"	312°	2015
	AD	7m3	11m6	124.5"	8°	2015

Robert Zebahl
70mm f/5.7, 22x, Bortle 6, SQM-L 19.1 AB: At 22x easy to separate with well visible difference in brightness. A difference in color is visible, but the assignment of colors was difficult. At 44x A appeared slightly orange, B rather bluish.

STF 141 (**)

Name:	STF141
Type:	**
Constellation:	And
Coordinates:	01h40m03.42s / +38°58'10.70"

Components:
	m₁	m₂	ρ	θ	Year
	8m3	8m6	1.7"	303°	2018

Robert Zebahl
102mm f/11, 125x, Bortle 6-, SQM-L 19.0 Clearly separated, but still very close. Slightly uneven.

STF 149 (**)

Name:	STF149
Type:	**
Constellation:	And
Coordinates:	01h44m30.83s / +39°57'31.10"

Components:
	m₁	m₂	ρ	θ	Year
	8m2	9m3	1.4"	81°	2018

Robert Zebahl
102mm f/11, 160x, Bortle 6-, SQM-L 19.0 At 125x almost split, noticeably uneven. At 160x split, but pretty tight.

STF 154 (**)

Name:	STF154
Type:	**
Constellation:	And
Coordinates:	01h45m02.50s / +43°42'22.80"

Components:
	m₁	m₂	ρ	θ	Year
	8m6	8m8	5.2"	127°	2016

Robert Zebahl
102mm f/11, 62x, Seeing 3/5 2020-11-02: At 28x clearly elongated, at 62x very finely separated with similar bright components. Pale orange & pale blue. At 125x similar color impression.

STF 155 (**)

Name:	STF155
Type:	**
Constellation:	Psc
Coordinates:	01h44m15.19s / +09°29'02.70"

Components:
		m₁	m₂	ρ	θ	Year
	AB	7m9	8m0	4.9"	325°	2018

Robert Zebahl
70mm f/5.7, 44x, Bortle 6, SQM-L 19.1 Lovely embedded in a small group of stars. The components showed a small difference in brightness and were very close together.

STF 162 (**)

Name:	STF162
Type:	**
Constellation:	Per
Coordinates:	01h49m15.47s / +47°53'47.10"

Components:
		m₁	m₂	ρ	θ	Year
	AB	6m5	7m2	2.0"	199°	2018
	AC	6m5	9m2	20.3"	178°	2018
	AD	6m5	10m0	138.7"	96°	2007
	BC	7m2	9m2	19.2"	177°	2018

Robert Zebahl
70mm f/5.7, 100x AB: At 100x partly split, otherwise '8'-shaped. At 128x clearly split. Difference in brightness noticeable.

STF 163 (**)

Name:	STF163
Type:	**
Constellation:	Cas
Coordinates:	01h51m16.93s / +64°51'17.90"

Components:
		m₁	m₂	ρ	θ	Year
	AB	6m8	9m1	34.5"	38°	2018

Robert Zebahl
70mm f/5.7, 20x, Bortle 7+, SQM-L 18.8 Easily split at 20x. From 44x the brighter component was orange colored, the fainter one tends to be more bluish.

STF 170 (**)

Name:	STF170
Type:	**
Constellation:	Cas
Coordinates:	01h55m27.35s / +76°13'28.40"

Components:
	m₁	m₂	ρ	θ	Year
	7m5	8m2	3.2"	244°	2016

Robert Zebahl
70mm f/5.7, 57x, Bortle 7 At 57x barely split with noticeable difference in brightness. At 128x easy split.

STF 178 (**)

Name:	STF178
Type:	**
Constellation:	Ari
Coordinates:	01h52m02.54s / +10°48'38.10"

Components:
	m₁	m₂	ρ	θ	Year
	8m2	8m2	3.0"	205°	2018

Robert Zebahl
63mm f/13.3, 67x, Bortle 6-, SQM-L 19.0 Clearly split, tight, apparently equally bright components.
70mm f/5.7, 100x, Bortle 7+, SQM-L 18.8 Split with equally bright components.

STF 179 (**)

Name:	STF179
Type:	**
Constellation:	And
Coordinates:	01h53m10.72s / +37°19'16.30"

Components:
	m₁	m₂	ρ	θ	Year
	7m6	8m1	3.5"	160°	2018

Robert Zebahl
102mm f/11, 62x, Seeing 3/5 2020-11-02: At 62x very nice sight! Finely separated pair of almost equally bright components. At 125x a small difference in brightness is visible. Pale orange & slightly bluish.

STF 182 (**)

Name:	STF182
Type:	**
Constellation:	Cas
Coordinates:	01h56m23.56s / +61°16'52.00"

Components:
		m₁	m₂	ρ	θ	Year
	AB	8m3	8m3	3.6"	125°	2016

Robert Zebahl
70mm f/5.7, 57x, Bortle 7 At 44x almost split. At 57x equally bright components visible.

STF 205 & STT 38 & BAR 22 (**)

Name:	STF205 & STT38 & BAR22, gamma And, 57 And, Alamak
Type:	**
Constellation:	And
Coordinates:	02h03m53.92s / +42°19'47.50"

Components:
		m₁	m₂	ρ	θ	Year
STF205	A-BC	2m3	5m0	9.4"	63°	2016
STT38	BC	5m3	6m5	0.2"	96°	2010
BAR22	AD	2m3	15m0	27.9"	245°	1898



Robert Zebahl
63mm f/13.3, 42x, Bortle 6-, SQM-L 19.0 A-BC: Easy to split with quite large difference in brightness.
152mm f/5.9, 100x, Bortle 6, SQM-L 19.3 A-BC: Very easy. A: orange, BC: rather white.

STF 212 (**)

Name:	STF212
Type:	**
Constellation:	Ari
Coordinates:	02h06m14.96s / +25°06'31.00"

Components:
	m₁	m₂	ρ	θ	Year
	8m3	8m7	1.9"	162°	2018

Robert Zebahl
63mm f/13.3, 168x, Bortle 6-, SQM-L 19.0 Not split, but partially seen as an '8'. Overall the double star appeared rather faint and both components seemed to be similarly bright.
70mm f/5.7, 128x, Bortle 7+, SQM-L 18.8 Barely split with slight difference in brightness.

STF 219 (**)

Name:	STF219
Type:	**
Constellation:	Tri
Coordinates:	02h10m16.10s / +33°21'55.20"

Components:
	m₁	m₂	ρ	θ	Year
	8m0	8m9	11.7"	186°	2015

Robert Zebahl
B 16x70, Bortle 6, SQM-L 19.2 2020-11-07: Immediately visible elongated, partly separated.
55mm f/9.1, 25x, Bortle 6, NELM 5m0+, SQM-L 19.1 Well separated with noticeable difference in brightness.

STF 227 (**)

Name:	STF227, iota Tri, 6 Tri
Type:	**
Constellation:	Tri
Coordinates:	02h12m22.28s / +30°18'11.10"

Components:
	m₁	m₂	ρ	θ	Year
	5m3	6m7	3.7"	69°	2016

Robert Zebahl
70mm f/5.7, 57x At 44x even separable with a clear difference in brightness, whereby the companion is almost outshone by the primary component. At 57x easy to separate. Primary component shines in bright orange, companion slightly orange. Beautiful sight together with STF232 in one field of view!

STF 232 (**)

Name:	STF232
Type:	**
Constellation:	Tri
Coordinates:	02h14m42.16s / +30°23'41.20"

Components:
	m₁	m₂	ρ	θ	Year
	7m8	7m9	6.5"	66°	2016

Robert Zebahl

70mm f/5.7, 22x
Very beautiful view! With all used magnifications together with iota Tri (6 Tri) in one field of view. Separable at 22x, but the components are still quite close together and appear similarly bright. At 44x easy to separate with little difference in brightness. At 57x a very small color difference is visible without being able to clearly name the colors. STF232 was sketched together with 6 Tri.

STF 239 (**)

Name:	STF239
Type:	**
Constellation:	Tri
Coordinates:	02h17m25.29s / +28°44'42.10"

Components:
	m₁	m₂	ρ	θ	Year
	7m1	7m8	13.6"	212°	2017

Robert Zebahl
B 16x70, Bortle 6, SQM-L 19.2 2020-11-07: Very nicely embedded in group of brighter and medium bright stars. Components relatively tight with little difference in brightness. Colorwise inconspicuous. Forms a trapezoid with three other stars in the north.
55mm f/9.1, 25x, Bortle 6, NELM 5m0+, SQM-L 19.1 Easy to split, large distance, noticeable difference in brightness.

STF 245 (**)

Name:	STF245
Type:	**
Constellation:	And
Coordinates:	02h18m36.27s / +40°16'43.70"

Components:
		m₁	m₂	ρ	θ	Year
	AB	7m3	8m0	11.0"	294°	2015

Robert Zebahl
120mm f/5, 50x, Bortle 6, SQM-L 19.3 Both components well seen with noticeable difference in brightness.

STF 249 (**)

Name:	STF249
Type:	**
Constellation:	And
Coordinates:	02h21m35.66s / +44°35'59.70"

Components:
	m₁	m₂	ρ	θ	Year
	7m2	9m0	2.4"	197°	2018

Robert Zebahl
63mm f/13.3, 168x, Bortle 6-, SQM-L 19.0 Not separated. The diffraction disk showed again and again irregularities, which indicated a double star.

STF 262 & CHR 6 (**)

Name:	STF262 & CHR6, iota Cas
Type:	**
Constellation:	Cas
Coordinates:	02h29m03.96s / +67°24'08.70"

Components:
		m₁	m₂	ρ	θ	Year
CHR6	Aa-Ab	4m6	8m5	0.6"	42°	2010
STF262	AB	4m6	6m9	2.9"	230°	2017
STF262	AC	4m6	9m1	6.7"	117°	2015
STF262	AD	4m6	8m5	210.9"	60°	2016



Robert Zebahl
55mm f/9.1, 27x, Bortle 7 Only the D component was well visible. The components B & C were not visible even at magnifications up to 167x. The sky was clearly brightened (Bortle 7).
70mm f/5.7, 120x, Bortle 6- Components A, B and C pretty close together, D far apart. Component B appeared slightly elongated on the first diffraction ring of the primary component. Rewarding!
152mm f/5.9, 129x Component D easy to see even at lowest magnification. Component C is also easily visible at 49x. At 69x the component B is indicated, at 100x clearly visible. C appears slightly grey-bluish and obviously fainter than B. Grand sight at 129x!

STF 268 (**)

Name:	STF268
Type:	**
Constellation:	Per
Coordinates:	02h29m24.96s / +55°32'10.50"

Components:
	m₁	m₂	ρ	θ	Year
	6m7	8m5	2.9"	131°	2018

Robert Zebahl
70mm f/5.7, 80x, Bortle 6 At 67x the faint companion can be guessed and is still slightly outshined by the primary component. At 80x and 100x relatively well separable with clear difference in brightness, but close together. The companion is close to the first diffraction ring of the primary component.
152mm f/5.9, 129x, Bortle 6, SQM-L 19.2 Easily separable with significant difference in brightness. The fainter companion is nicely separated from the primary component and visible as a tiny star.

STF 272 (**)

Name:	STF272
Type:	**
Constellation:	Per
Coordinates:	02h33m08.71s / +58°27'44.90"

Components:
	m₁	m₂	ρ	θ	Year
	8m3	8m4	1.9"	216°	2017

Robert Zebahl
152mm f/5.9, 129x, Bortle 6, SQM-L 19.2 Easy to separate, but close together with very little difference in brightness. Beautiful view. Double star stands in a half arc of stars.

STF 291 (**)

Name:	STF291
Type:	**
Constellation:	Ari
Coordinates:	02h41m06.59s / +18°48'00.70"

Components:
		m₁	m₂	ρ	θ	Year
	AB	7m7	7m5	3.4"	118°	2017
	AC	7m7	9m5	65.5"	242°	2015

Robert Zebahl
70mm f/5.7, 57x AB: At 44x almost, at 57x clearly split, but still very tight with rather small difference in brightness.

STF 295 (**)

Name:	STF295, 84 Cet
Type:	**
Constellation:	Cet
Coordinates:	02h41m14.00s / -00°41'44.40"

Components:
	m₁	m₂	ρ	θ	Year
	5m8	9m7	3.6"	301°	2012



Robert Zebahl
102mm f/11, 160x Quite easy at a moderate distance, whereby the companion appeared rather faint and was best visible with averted vision.
152mm f/5.9, 129x Easy. The quite dim companion is immediately visible in moderate distance clearly outside of the first diffraction ring despite few, high clouds. The primary component appeared white-yellowish.

STF 301 (**)

Name:	STF301
Type:	**
Constellation:	Per
Coordinates:	02h47m38.75s / +53°56'35.80"

Components:
	m₁	m₂	ρ	θ	Year
	7m8	8m7	8.2"	18°	2016

Robert Zebahl
70mm f/5.7, 22x, Bortle 6 Rather faint double star with a handful of other stars in the immediate vicinity. At 22x clearly separated, but still close together with visible difference in brightness. At 31x the primary component looked slightly orange.

STF 311 (**)

Name:	STF311, pi Ari, 42 Ari
Type:	**
Constellation:	Ari
Coordinates:	02h49m17.55s / +17°27'51.50"

Components:
		m₁	m₂	ρ	θ	Year
	AB	5m3	8m0	3.3"	118°	2015

Robert Zebahl
70mm f/5.7, 133x The companion is visible as elongated, non-condensed brightening in the first diffraction ring of the primary component.

STF 331 (**)

Name:	STF331
Type:	**
Constellation:	Per
Coordinates:	03h00m52.18s / +52°21'06.50"

Components:
	m₁	m₂	ρ	θ	Year
	5m2	6m2	11.8"	86°	2018

Robert Zebahl
63mm f/13.3, 46x Easy to separate with relatively large difference in brightness.

STF 360 (**)

Name:	STF360
Type:	**
Constellation:	Per
Coordinates:	03h12m09.59s / +37°13'03.30"

Components:
	m₁	m₂	ρ	θ	Year
	8m0	8m3	2.7"	126°	2015



Robert Zebahl
70mm f/5.7, 67x, Bortle 6 Pretty faint double star. At 57x barely separable with almost touching diffraction disks. The components seemed similarly bright. At 67x still very close together, at 100x easy to separate.
152mm f/5.9, 69x, Bortle 6-, SQM-L 19.0 Split, but close together, similarly bright. The double star appears overall slightly orange compared to the surrounding stars.

STF 369 (**)

Name:	STF369
Type:	**
Constellation:	Per
Coordinates:	03h17m11.45s / +40°28'58.60"

Components:
	m₁	m₂	ρ	θ	Year
	6m8	7m7	3.6"	29°	2016

Robert Zebahl
70mm f/5.7, 57x, Bortle 6 At 44x still separable with noticeable difference in brightness. At 57x well separable, whereby the components are still very close together. The difference in brightness is more clearly visible here.
152mm f/5.9, 100x, Bortle 6-, SQM-L 19.0 Easily separable with clear difference in brightness. In terms of color, both components appeared slightly different: white-yellowish, slightly orange.

STF 389 (**)

Name:	STF389
Type:	**
Constellation:	Cam
Coordinates:	03h30m10.93s / +59°21'57.80"

Components:
		m₁	m₂	ρ	θ	Year
	AB	6m4	7m9	2.6"	72°	2018

Robert Zebahl
70mm f/5.7, 133x, Bortle 6, SQM-L 19.2 Easy to find and separated at 67x, but very tight. Easily separable at 133x, still relatively tight together with significant difference in brightness.

STF 391 (**)

Name:	STF391
Type:	**
Constellation:	Per
Coordinates:	03h29m13.74s / +45°02'57.50"

Components:
	m₁	m₂	ρ	θ	Year
	7m6	8m3	3.9"	96°	2018

Robert Zebahl
70mm f/5.7, 57x, Bortle 6 Clearly split, but close together, moderate difference in brightness. The double star is located in a very beautiful star field with some of the stars appearing colored, but this only came into its own at low magnification.
152mm f/5.9, 69x, Bortle 6-, SQM-L 19.0 Easy to separate with moderate difference in brightness. Slight difference in color: white-yellowish, slightly orange.

STF 401 (**)

Name:	STF401
Type:	**
Constellation:	Tau
Coordinates:	03h31m20.76s / +27°34'18.50"

Components:
		m₁	m₂	ρ	θ	Year
	AB	6m6	6m9	11.5"	270°	2018

Robert Zebahl
120mm f/5, 18x, Bortle 6-, NELM 4m8+, SQM-L 19.1 Barely split at 18x. At 40x difference in brightness is visible. Nice view together with the double star STFA7 located northwest.

STF 419 (**)

Name:	STF419
Type:	**
Constellation:	Cam
Coordinates:	03h42m45.19s / +69°50'44.30"

Components:
		m₁	m₂	ρ	θ	Year
	AB	7m8	7m8	2.9"	73°	2018

Robert Zebahl
70mm f/5.7, 67x, Bortle 6, SQM-L 19.2 Separated, but tight with equally bright components. Beautiful sight.

STF 425 (**)

Name:	STF425
Type:	**
Constellation:	Per
Coordinates:	03h40m07.24s / +34°06'59.30"

Components:
		m₁	m₂	ρ	θ	Year
	AB	7m5	7m6	1.9"	59°	2018



Robert Zebahl
152mm f/5.9, 129x, Bortle 6, SQM-L 19.2 Beautifully separated, relatively close together, very little difference in brightness.

STF 427 (**)

Name:	STF427, V1268 Tau
Type:	**
Constellation:	Tau
Coordinates:	03h40m38.77s / +28°46'24.00"

Components:
	m₁	m₂	ρ	θ	Year
	7m4	7m8	7.0"	207°	2016

Robert Zebahl
120mm f/5, 40x, Bortle 6-, NELM 4m8+, SQM-L 19.1 At 40x barely split. At 75x easily split with visible difference in brightness.

STF 434 (**)

Name:	STF434
Type:	**
Constellation:	Per
Coordinates:	03h43m58.92s / +38°22'25.60"

Components:
		m₁	m₂	ρ	θ	Year
	AB	7m8	8m3	33.7"	83°	2018
	AC	7m8	13m6	91.9"	350°	2015

Robert Zebahl
B 16x70, Bortle 6, SQM-L 19.2 AB: 2020-11-07: Beautiful sight! Nice separation and color contrast: vivid orange & subtle blue.
102mm f/11, 28x, Bortle 7- AB: 2020-11-08: Easy to separate, beautiful sight! Light orange & light blue.

STF 443 (**)

Name:	STF443
Type:	**
Constellation:	Per
Coordinates:	03h47m02.11s / +41°25'38.10"

Components:
		m₁	m₂	ρ	θ	Year
	AB	8m2	8m8	6.9"	56°	2016
	AC	8m2	11m4	106.2"	331°	2002



Robert Zebahl
102mm f/11, 28x, Bortle 7- AB: 2020-11-08: Nicely separated, relatively close together with little difference in brightness.

STF 464 (**)

Name:	STF464, zeta Per, 44 Per
Type:	**
Constellation:	Per
Coordinates:	03h54m07.92s / +31°53'01.20"

Components:
		m₁	m₂	ρ	θ	Year
	AB	2m9	9m2	12.9"	209°	2012
	AC	2m9	11m2	33.3"	286°	2012
	AD	2m9	10m4	98.6"	195°	2012
	AE	2m9	10m0	120.0"	186°	2012

Robert Zebahl
102mm f/11, 106x, Bortle 4, SQM-L 21.2 AB: Easy to separate, but the B component appeared only as a very faint, tiny companion.

STF 470 (**)

Name:	STF470, 32 Eri
Type:	**
Constellation:	Eri
Coordinates:	03h54m17.49s / -02°57'17.00"

Components:
		m₁	m₂	ρ	θ	Year
	AB	4m8	5m9	6.9"	349°	2018

Robert Zebahl
55mm f/9.1, 27x, Bortle 6, NELM 5m0+ At 27x split, but still tight with noticeable difference in brightness. A slight difference in colors could be seen. At 56x the color difference was very evident: The brighter component appeared slightly yellowish, the fainter one slightly bluish. Highly recommended! The sketch was done few days later during another observation.

STF 471 (**)

Name:	STF471, epsilon Per, 45 Per
Type:	**
Constellation:	Per
Coordinates:	03h57m51.22s / +40°00'36.90"

Components:
		m₁	m₂	ρ	θ	Year
	AB	2m9	8m9	9.1"	10°	2015

Robert Zebahl
63mm f/13.3, 46x Easy to separate, but much fainter, second component, which appears as a small, faint spot. Nice view.

STF 476 (**)

Name:	STF476
Type:	**
Constellation:	Per
Coordinates:	04h01m34.83s / +38°39'55.80"

Components:
		m₁	m₂	ρ	θ	Year
	AB	8m0	9m2	25.9"	289°	2015
	BC	9m2	13m1	69.7"	210°	2015

Robert Zebahl
B 16x70, Bortle 6, SQM-L 19.2 AB: 2020-11-07: Easy to split at moderate distance and clear difference in brightness. Companion well visible as a tiny star. Primary component appears slightly orange.

STF 479 (**)

Name:	STF479
Type:	**
Constellation:	Tau
Coordinates:	04h00m56.81s / +23°12'05.40"

Components:
		m₁	m₂	ρ	θ	Year
	AB	6m9	7m8	7.5"	127°	2018
	AC	6m9	9m4	57.7"	243°	2018

Robert Zebahl
102mm f/11, 28x, Bortle 6, SQM-L 19.3, Seeing 2/5 Components A & B clearly separated with visible difference in brightness. Noticeably fainter component C much wider apart. All three components form an obtuse triangle.
152mm f/5.9, 49x, Bortle 6, SQM-L 19.3, Seeing 2/5 Nice view. All three components easy to separate. A: white-yellowish; B: creamy white.
8" f/6, 37x, Bortle 4, SQM-L 21.00 AB: Nice, evident double star, easy to split. Slight difference in brightness.

STF 485 (**)

Name:	STF485, SZ Cam
Type:	**
Constellation:	Cam
Coordinates:	04h07m51.38s / +62°19'48.40"

Components:
		m₁	m₂	ρ	θ	Year
	AE	6m9	6m9	18.0"	306°	2018

Robert Zebahl
B 8x40, Bortle 6, NELM 5m0+ Split, but very tight with equally bright components. I used a tripod.
70mm f/5.7, 15x, Bortle 4-, SQM-L 20.9 Easily split with nearly equally bright components. Located in the center of the open cluster NGC1502. Very nice view.

STF 494 (**)

Name:	STF494
Type:	**
Constellation:	Tau
Coordinates:	04h08m53.50s / +23°05'55.10"

Components:
	m₁	m₂	ρ	θ	Year
	7m5	7m7	5.3"	188°	2018

Robert Zebahl
102mm f/11, 62x, Bortle 6, SQM-L 19.3, Seeing 2/5 At 28x separated, but very tight, similarly bright, both whitish. At 62x easy to separate, little difference in brightness and color: slightly orange; white-bluish. Color impression slightly more intense at 86x.
152mm f/5.9, 49x, Bortle 6, SQM-L 19.3, Seeing 2/5 Easy to separate at 49x with subtle color differences: slightly orange; white-bluish. Color impression slightly more intense at 100x. Beautiful sight.

STF 519 & GUI 5 (**)

Name:	STF519 & GUI5, WDS04209+5023
Type:	**
Constellation:	Per
Coordinates:	04h20m53.71s / +50°22'39.00"

Components:
		m₁	m₂	ρ	θ	Year
STF519	AB	7m8	9m4	17.9"	348°	2015
GUI5	AC	7m8	10m8	108.8"	193°	2015

Robert Zebahl
B 16x70, Bortle 6, SQM-L 19.2 STF519 (AB): 2020-11-07: Beautifully framed by brighter stars! Primary component A appears slightly orange with a much fainter, very close companion. To the south is S445, which forms a prominent triangle of stars of different brightness. The brightest of these three stars also appears orange.
102mm f/11, 28x, Bortle 7- STF519 (AB): 2020-11-08: Well separated with large difference in brightness. Primary component appeared white-yellowish. South very outstanding is the double star S445. Worthwhile due to the beautiful surroundings.

STF 559 (**)

Name:	STF559
Type:	**
Constellation:	Tau
Coordinates:	04h33m33.04s / +18°01'00.20"

Components:
	m₁	m₂	ρ	θ	Year
	7m0	7m0	3.0"	277°	2018

Robert Zebahl
70mm f/5.7, 57x Barely split with similarly bright components.
102mm f/11, 160x Very nice view! Easy to separate, similarly bright at a nice distance from each other. The colors of the components changed over time: orange and subtle blue.
152mm f/5.9, 69x Beautiful sight, similar bright components, pretty tight.

STF 572 (**)

Name:	STF572
Type:	**
Constellation:	Tau
Coordinates:	04h38m29.58s / +26°56'25.60"

Components:
		m₁	m₂	ρ	θ	Year
	AB	7m4	7m2	4.4"	189°	2018



Robert Zebahl
70mm f/5.7, 57x Clearly separated, easy with beautiful color contrast: A slightly orange, B white.

STF 587 (**)

Name:	STF587
Type:	**
Constellation:	Cam
Coordinates:	04h48m01.72s / +53°07'19.20"

Components:
	m₁	m₂	ρ	θ	Year
	7m6	9m2	21.0"	185°	2018

Robert Zebahl
B 16x70, Bortle 6, SQM-L 19.2 2020-11-07: Easily separable with clear brightness difference. Moderately bright with faint companion at moderate distance. Color wise unspectacular.

STF 616 (**)

Name:	STF616, omega Aur, 4 Aur
Type:	**
Constellation:	Aur
Coordinates:	04h59m15.41s / +37°53'24.90"

Components:
		m₁	m₂	ρ	θ	Year
	AB	5m0	8m2	4.7"	4°	2015

Robert Zebahl
70mm f/5.7, 57x Easy, still relatively tight with a large difference in brightness. Component A appeared pretty bright and white-yellowish, while B appeared only as a tiny star. Very nice sight.

STF 644 (**)

Name:	STF644
Type:	**
Constellation:	Aur
Coordinates:	05h10m18.81s / +37°18'06.70"

Components:
		m₁	m₂	ρ	θ	Year
	AB	7m0	6m8	1.6"	221°	2019

Robert Zebahl
70mm f/5.7, 100x At 57x slightly elongated with a partially visible notching. At 100x & 133x two clearly overlapping diffraction disks are visible as figure '8' with a small difference in brightness.
102mm f/11, 129x Grand sight! Two almost touching diffraction disks, slight difference in brightness, both slightly yellowish.
152mm f/5.9, 129x Great view, easy to separate, but still quite close together with low difference in brightness. Both components appeared slightly orange.

STF 648 (**)

Name:	STF648
Type:	**
Constellation:	Aur
Coordinates:	05h10m59.19s / +32°02'19.50"

Components:
		m₁	m₂	ρ	θ	Year
	AB	8m1	8m9	4.7"	62°	2019



Robert Zebahl
55mm f/9.1, 40x, Bortle 6, SQM-L 19.4 At 40x tight with obviously fainter component.
70mm f/5.7, 33x Separated, but tight with noticeable difference in brightness.

STF 664 (**)

Name:	STF664
Type:	**
Constellation:	Ori
Coordinates:	05h15m10.54s / +08°25'56.80"

Components:
	m₁	m₂	ρ	θ	Year
	7m8	8m4	4.8"	177°	2019

Robert Zebahl
70mm f/5.7, 100x, Bortle 6, SQM-L 19.2 At 44x barely split. At 100x easily split with obvious difference in brightness.

STF 666 (**)

Name:	STF666
Type:	**
Constellation:	Aur
Coordinates:	05h17m05.80s / +33°19'47.20"

Components:
	m₁	m₂	ρ	θ	Year
	7m8	7m9	3.2"	75°	2019

Robert Zebahl
55mm f/9.1, 83x, Bortle 6, SQM-L 19.4 At 40x slightly elongated, at 38x separated, but tight. Overall faint with components of similar brightness.
70mm f/5.7, 57x Split, no difference in brightness and color. Very nice!

STF 668 (**)

Name:	STF668, 19 Ori, beta Ori, Rigel
Type:	**
Constellation:	Ori
Coordinates:	05h14m32.27s / -08°12'05.90"

Components:
		m₁	m₂	ρ	θ	Year
	A-BC	0m3	6m8	9.7"	202°	2017

Robert Zebahl
55mm f/9.1, 83x The second component was immediately seen as faint companion.
70mm f/5.7, 67x First attempt at 133x: much fainter component clearly visible as a tiny star at a relatively large distance. After that the visibility was easy even at 67x. At 44x the faint component could only be guessed.
102mm f/11, 160x, Bortle 7, SQM-L 18.8, Seeing 3-4/5 Much fainter companion immediately visible as tiny star far outside the diffraction pattern of the primary component.

STF 669 (**)

Name:	STF669
Type:	**
Constellation:	Aur
Coordinates:	05h18m56.78s / +45°14'51.40"

Components:
	m₁	m₂	ρ	θ	Year
	8m4	9m0	9.9"	278°	2015

Robert Zebahl
55mm f/9.1, 25x, Bortle 6, SQM-L 19.4 Well separated with visible difference in brightness.

STF 681 (**)

Name:	STF681
Type:	**
Constellation:	Aur
Coordinates:	05h20m39.16s / +46°57'49.60"

Components:
		m₁	m₂	ρ	θ	Year
	AB	6m6	9m2	23.3"	183°	2017

Robert Zebahl
B 16x70, Bortle 6, SQM-L 19.2 2020-11-07: Together with Capella in one field of view. Beautiful surrounding. Moderate distance and large difference in brightness. Primary component appears white-yellowish with faint companion.

STF 688 (**)

Name:	STF688
Type:	**
Constellation:	Ori
Coordinates:	05h19m20.88s / -10°44'49.90"

Components:
	m₁	m₂	ρ	θ	Year
	7m5	7m5	10.7"	95°	2015

Robert Zebahl
70mm f/5.7, 44x, Bortle 6, SQM-L 19.2 Clearly split with decent angular distance. Components appeared nearly equally bright.

STF 698 (**)

Name:	STF698
Type:	**
Constellation:	Aur
Coordinates:	05h25m12.94s / +34°51'18.60"

Components:
		m₁	m₂	ρ	θ	Year
	AB	6m7	8m3	31.3"	348°	2018

Robert Zebahl
102mm f/11, 62x, Seeing 2-3/5 Beautiful double star, easy to separate and quite striking. Primary component appeared in clear orange, the companion was too faint to identify the color.
152mm f/5.9, 22x, Seeing 2-3/5 Easy with a attractive separation and a clear difference in brightness. A: pale yellow; B: creamy white with a touch of blue. At 49x the color impression was a bit more intense. Located in beautiful field of stars.

STF 699 (**)

Name:	STF699
Type:	**
Constellation:	Aur
Coordinates:	05h25m38.50s / +38°02'41.10"

Components:
		m₁	m₂	ρ	θ	Year
	AB	7m9	8m6	8.9"	346°	2018

Robert Zebahl
55mm f/9.1, 25x, Bortle 6, SQM-L 19.4 Well separated with slightly fainter companion.
70mm f/5.7, 22x Separated at 22x, but still a relatively tight pair with a moderate difference in brightness. Together with sigma Aur in one field of view. Overall rather dim double star. At 57x very nice view! A: pale orange, B: slightly bluish

STF 700 (**)

Name:	STF700, V1804 Ori
Type:	**
Constellation:	Ori
Coordinates:	05h23m05.54s / +01°03'24.70"

Components:
	m₁	m₂	ρ	θ	Year
	7m7	7m9	4.8"	4°	2017

Robert Zebahl
70mm f/5.7, 44x, Bortle 6, SQM-L 19.2 At 44x split, but very close together. At 100x clearly split with nearly equally bright components.

STF 716 (**)

Name:	STF716, 118 Tau
Type:	**
Constellation:	Tau
Coordinates:	05h29m16.49s / +25°09'01.10"

Components:
		m₁	m₂	ρ	θ	Year
	AB	5m8	6m7	4.9"	209°	2019
	AC	5m8	11m9	140.2"	99°	2001

Robert Zebahl
70mm f/5.7, 33x AB: At 33x very tight with visible difference in brightness. At 47x very nice view. Both components appeared white.

STF 718 (**)

Name:	STF718
Type:	**
Constellation:	Aur
Coordinates:	05h32m20.59s / +49°23'36.50"

Components:
		m₁	m₂	ρ	θ	Year
	AB	7m5	7m5	7.7"	73°	2015

Robert Zebahl
55mm f/9.1, 25x, Bortle 6, SQM-L 19.4 Easy to split with similarly bright components. Nive view.

STF 719 (**)

Name:	STF719
Type:	**
Constellation:	Aur
Coordinates:	05h30m06.14s / +29°32'55.30"

Components:
		m₁	m₂	ρ	θ	Year
	AB	7m5	8m8	1.4"	336°	2016
	AC	7m5	9m4	15.2"	353°	2016

Robert Zebahl
70mm f/5.7, 22x AC: At 22x clearly visible difference in brightness at moderate separation. The companion appears only as a dim star. At 57x the color contrast is also quite noticeable. A: light orange, C: silvery blue
102mm f/11, 62x, Seeing 2-3/5 AC: Easy with a rather dim companion. The color seemed a bit more intense than in the 6-inch refractor. A: lovely pale orange; B: grey-bluish.
152mm f/5.9, 129x, Bortle 5, SQM-L 20.7, Seeing 3/5 AB: At 129x clearly elongated. Difference in brightness visible. The seeing was mediocre (3/5), so that the diffraction disks were only occasionally visible. At 180x no better.
152mm f/5.9, 49x, Seeing 2-3/5 AC: Easy to separate with a significant difference in brightness. A appeared in bright orange, B appeared greyish-blue.

STF 730 (**)

Name:	STF730
Type:	**
Constellation:	Tau
Coordinates:	05h32m14.14s / +17°03'29.30"

Components:
		m₁	m₂	ρ	θ	Year
	AB	6m1	6m4	9.7"	142°	2018

Robert Zebahl
70mm f/5.7, 22x At 22x beautiful sight, easy to separate with little difference in brightness. A appeared slightly yellowish. At 57x moderate, but still very nice color contrast: A yellowish, B rather white.

STF 736 (**)

Name:	STF736
Type:	**
Constellation:	Aur
Coordinates:	05h37m07.20s / +41°49'41.70"

Components:
	m₁	m₂	ρ	θ	Year
	7m5	8m6	2.7"	-	2019

Robert Zebahl
70mm f/5.7, 57x At 57x split with almost no space in between. At 100x clearly split with noticeable fainter component.

STF 742 (**)

Name:	STF742
Type:	**
Constellation:	Tau
Coordinates:	05h36m26.38s / +21°59'35.10"

Components:
	m₁	m₂	ρ	θ	Year
	7m1	7m5	4.2"	275°	2019


Located about 0.5 degree east of Messier 1.
Robert Zebahl
102mm f/11, 62x, Bortle 6, SQM-L 19.3, Seeing 2/5 Beautifully separated, relatively tight with well visible difference in brightness. Points directly toward Messier 1 and can be observed with it in one field of view. Very nice!
120mm f/5, 48x, Bortle 6, SQM-L 19.2 Nice, evident double near Messier 1. Easy to split with almost equally bright components.
152mm f/5.9, 69x, Bortle 6, SQM-L 19.3, Seeing 2/5 At 49x just so, at 69x easily separable. The fainter component appeared a little warmer in terms of color. Great view together with Messier 1 in the field of view.
8" f/6, 80x, Bortle 4-, SQM-L 20.8 Nice double star with nearly equally bright components.

STF 749 (**)

Name:	STF749
Type:	**
Constellation:	Tau
Coordinates:	05h37m08.84s / +26°55'28.30"

Components:
		m₁	m₂	ρ	θ	Year
	AB	6m5	6m5	1.1"	319°	2017
	AC	6m5	10m5	181.6"	299°	2011



Robert Zebahl
70mm f/5.7, 133x AB: I had the impression that in the correct position angle, without knowing that angle during observation, a minimal elongation could be detected. But observation is borderline and too doubtful.

STF 764 (**)

Name:	STF764
Type:	**
Constellation:	Aur
Coordinates:	05h41m20.98s / +29°29'14.70"

Components:
	m₁	m₂	ρ	θ	Year
	6m4	7m1	25.6"	14°	2017

Robert Zebahl
B 8x44 2020-11-25: Cleanly split, rather close together. In beautiful star field together with beta Tauri.
55mm f/9.1, 25x, Bortle 6, SQM-L 19.4 Easy to split with large distance and noticeable difference in brightness.
70mm f/5.7, 22x Very easy and bright, pretty wide apart with a small difference in brightness; whitish and slightly yellowish.

STF 774 (**)

Name:	STF774, zeta Ori, 50 Ori, Alnitak
Type:	**
Constellation:	Ori
Coordinates:	05h40m45.52s / -01°56'33.30"

Components:
		m₁	m₂	ρ	θ	Year
	AB	1m9	3m7	2.4"	167°	2017
	AC	1m9	9m6	58.5"	10°	2017



Robert Zebahl
70mm f/5.7, 128x, Bortle 6 AB: Big difference in brightness. I could see the fainter component near the first ring of the Airy pattern of the brighter component.

STF 796 (**)

Name:	STF796
Type:	**
Constellation:	Aur
Coordinates:	05h49m55.53s / +31°47'08.70"

Components:
		m₁	m₂	ρ	θ	Year
	AB	7m2	8m2	3.7"	62°	2019

Robert Zebahl
55mm f/9.1, 83x, Bortle 6, SQM-L 19.4 Well split with noticeable fainter companion.

STF 845 (**)

Name:	STF845, 41 Aur
Type:	**
Constellation:	Aur
Coordinates:	06h11m36.59s / +48°42'39.60"

Components:
	m₁	m₂	ρ	θ	Year
	6m2	6m9	7.6"	357°	2018

Robert Zebahl
55mm f/9.1, 25x, Bortle 6, SQM-L 19.4 Relatively tight with visible difference in brightness.

STF 848 (**)

Name:	STF848
Type:	**
Constellation:	Ori
Coordinates:	06h08m30.36s / +13°58'15.80"

Components:
		m₁	m₂	ρ	θ	Year
	AB	7m3	8m2	2.6"	110°	2019

Robert Zebahl
70mm f/5.7, 100x, Bortle 6, SQM-L 19.2 Well split with obvious difference in brightness.

STF 872 (**)

Name:	STF872
Type:	**
Constellation:	Aur
Coordinates:	06h15m39.06s / +36°08'55.30"

Components:
		m₁	m₂	ρ	θ	Year
	AB	6m9	7m4	11.3"	215°	2017

Robert Zebahl
55mm f/9.1, 25x, Bortle 6, SQM-L 19.4 Well separated with significant difference in brightness.

STF 877 (**)

Name:	STF877
Type:	**
Constellation:	Ori
Coordinates:	06h14m42.67s / +14°35'10.80"

Components:
	m₁	m₂	ρ	θ	Year
	7m5	8m0	5.7"	263°	2019

Robert Zebahl
70mm f/5.7, 44x, Bortle 6, SQM-L 19.2 Well split, but close together. Little difference in brightness noticeable.

STF 899 (**)

Name:	STF899
Type:	**
Constellation:	Gem
Coordinates:	06h22m49.64s / +17°34'27.30"

Components:
	m₁	m₂	ρ	θ	Year
	7m4	8m0	2.2"	17°	2019

Robert Zebahl
70mm f/5.7, 133x Separated, but tight with visible difference in brightness.

STF 900 (**)

Name:	STF900, epsilon Mon, 8 Mon
Type:	**
Constellation:	Mon
Coordinates:	06h23m46.10s / +04°35'34.20"

Components:
		m₁	m₂	ρ	θ	Year
	AB	4m4	6m6	12.0"	29°	2017

Robert Zebahl
55mm f/9.1, 42x Relatively large distance and clear difference in brightness. The lighter component seemed white-yellowish, the weaker one slightly greenish-blue. The color contrast, however, was not particularly conspicuous.

STF 918 (**)

Name:	STF918
Type:	**
Constellation:	Aur
Coordinates:	06h33m57.62s / +52°27'41.80"

Components:
		m₁	m₂	ρ	θ	Year
	AB	7m3	8m2	4.9"	336°	2019

Robert Zebahl
55mm f/9.1, 40x, Bortle 6, SQM-L 19.4 At 40x tight, at 55x well split with obviously fainter companion.

STF 922 (**)

Name:	STF922
Type:	**
Constellation:	Cam
Coordinates:	06h38m18.76s / +64°44'06.00"

Components:
		m₁	m₂	ρ	θ	Year
	AB	7m7	10m8	10.5"	137°	2015
	AC	7m7	11m2	24.4"	9°	2015

Robert Zebahl
70mm f/5.7, 100x, Bortle 6, SQM-L 19.5 2020-04-16: Component A looked slightly yellowish, components B & C appeared rather dim.

STF 924 (**)

Name:	STF924, 20 Gem
Type:	**
Constellation:	Gem
Coordinates:	06h32m18.52s / +17°47'03.40"

Components:
		m₁	m₂	ρ	θ	Year
	AB	6m3	6m9	20.7"	212°	2017
	BC	6m9	13m0	47.8"	144°	2014

Robert Zebahl
B 16x70 AB: 2021-02-22: Easy to separate with small difference in brightness. Conspicuous double star. White-yellowish & white-bluish.
70mm f/5.7, 22x AB: At 22x bright, immediately conspicuous, although in a relatively star-rich surrounding. Moderate but beautiful color contrast: bright orange, subtle blue. Also at 44x very beautiful sight.
152mm f/5.9, 69x, Bortle 6, SQM-L 19.3, Seeing 3/5 AB: Easy, bright, moderately uneven. Nice contrast in color: slight orange, white-bluish.

STF 925 (**)

Name:	STF925
Type:	**
Constellation:	Cam
Coordinates:	06h40m10.00s / +67°19'24.50"

Components:
	m₁	m₂	ρ	θ	Year
	8m1	10m5	3.5"	93°	2003

Robert Zebahl
70mm f/5.7, 133x, Bortle 6, SQM-L 19.5 2020-04-16: At 100x and 133x not split.

STF 928 (**)

Name:	STF928
Type:	**
Constellation:	Aur
Coordinates:	06h34m41.81s / +38°32'24.50"

Components:
		m₁	m₂	ρ	θ	Year
	AB	7m9	8m6	3.4"	131°	2019
	AC	7m9	12m4	130.9"	124°	2002
	BC	8m6	12m4	127.3"	124°	2015

Robert Zebahl
102mm f/11, 62x, Bortle 6 AB: At 28x the double star already appeared elongated, at 62x beautifully separated, with component A shining in a warm, subtle orange. At 125x A appeared orange, B grey-bluish.
152mm f/5.9, 69x, Bortle 6, SQM-L 19.3, Seeing 3/5 AB: Clearly separated, but tight. Moderate difference in brightness. Nice view with the nearby double stars STT147 & STF 929 and the carbon star UU Aur!

STF 929 (**)

Name:	STF929
Type:	**
Constellation:	Aur
Coordinates:	06h35m22.03s / +37°42'55.10"

Components:
	m₁	m₂	ρ	θ	Year
	7m3	8m4	6.5"	24°	2016

Robert Zebahl
152mm f/5.9, 69x, Bortle 6, SQM-L 19.3, Seeing 3/5 Easy to separate, clear difference in brightness, slight color contrast. Primary component showed a slight orange color, the color of the companion was not clearly defineable. Nice view with the nearby double stars STT147 & STF 928 and the carbon star UU Aur!

STF 932 (**)

Name:	STF932
Type:	**
Constellation:	Gem
Coordinates:	06h34m21.57s / +14°45'08.30"

Components:
	m₁	m₂	ρ	θ	Year
	8m3	8m5	1.6"	305°	2017



Robert Zebahl
70mm f/5.7, 150x Unfortunately a nearby lamp bothered me. I could see the double star at least elongated.

STF 941 (**)

Name:	STF941
Type:	**
Constellation:	Aur
Coordinates:	06h38m40.76s / +41°34'53.40"

Components:
		m₁	m₂	ρ	θ	Year
	AB	7m2	8m2	2.0"	83°	2019
	AC	7m2	10m5	83.9"	135°	2015

Robert Zebahl
102mm f/11, 86x, Bortle 6 AB: At 62x only visible as figure '8'. The difference in brightness is hardly noticeable. At 86x barely separated, obvious. Clearly separated at 125x, but still tight with a moderate brightness difference.
102mm f/11, 28x, Bortle 6 AC: Distant, faint companion that is less attracting attention. Used magnifications between 28x and 125x.

STF 946 (**)

Name:	STF946
Type:	**
Constellation:	Lyn
Coordinates:	06h44m51.62s / +59°26'57.40"

Components:
	m₁	m₂	ρ	θ	Year
	7m3	9m1	4.0"	129°	2019

Robert Zebahl
102mm f/11, 86x, Bortle 6-, SQM-L 19.0 Easy to split with noticeable difference in brightness. Very nice view together with the triple system STF 948 in one field of view!
152mm f/5.9, 100x, Bortle 6, SQM-L 19.4 At 100x and 129x easy to separate, quite uneven. Primary component appeared yellowish, the fainter one rather greyish. Fantastic view together with 12 Lyn (STF 948) in one field of view!

STF 948 (**)

Name:	STF948, 12 Lyn
Type:	**
Constellation:	Lyn
Coordinates:	06h46m14.15s / +59°26'30.10"

Components:
		m₁	m₂	ρ	θ	Year
	AB	5m4	6m0	1.9"	64°	2019
	AC	5m4	7m0	8.8"	310°	2018



Robert Zebahl
55mm f/9.1, 167x AB: Components A and B separated, whereby the Airy disks slightly overlap. The difference in brightness was well visible.
55mm f/9.1, 27x AC: Components A/B and C well separated, but tight. Significant difference in brightness. The fainter C companion appeared slightly orange, the brighter one white-bluish.
63mm f/13.3, 140x AB: Components A and B split with almost no space in between. The difference in brightness was visible.
70mm f/5.7, 133x AB: Both components A + B clearly split, whereby the diffraction rings where merged together. A very nice view together with component C. I sketched this triplet, which reflects my impression well. Unfortunately, the distance and position angle are not particularly well observed. Also the difference in brightness I didn't noticed during my observation.
70mm f/5.7, 22x AC: Well split, relatively close together with significant difference in brightness.
102mm f/11, 129x, Bortle 6-, SQM-L 19.0 At 28x the pair AC is nicely separated without any problems. The close pair AB is already recognizable at 86x as a clear figure '8', at 125x wonderfully separated. The components A & B appear yellowish. Very nice view together with STF 946 in one field of view!
152mm f/5.9, 129x, Bortle 6, SQM-L 19.4 At 49x the pair AC is beautifully separated with a significant difference in brightness. At 100x, the close pair AB is also separated, although still very close together. A slight difference in brightness is noticeable. At 129x, the view is magnificent. The two bright components A & B present themselves yellowish, the fainter component C rather greyish. STF 948 can be well observed in a field of view with the neighbouring double star STF 946. Both show a nice overall scenery.

STF 957 (**)

Name:	STF957
Type:	**
Constellation:	Gem
Coordinates:	06h45m10.02s / +30°49'33.50"

Components:
		m₁	m₂	ρ	θ	Year
	AB	7m5	9m4	3.8"	90°	2019
	AC	7m5	13m8	19.3"	100°	2015

Robert Zebahl
70mm f/5.7, 100x AB: Too faint for a separation. Primary component visible, companion not. Used magnifications from 67x to 133x. Observation from city at moon (83%).
152mm f/5.9, 129x, Bortle 6, SQM-L 19.3, Seeing 3/5 AB: Easy with significant difference in brightness and moderate angular distance.

STF 958 (**)

Name:	STF958
Type:	**
Constellation:	Lyn
Coordinates:	06h48m12.29s / +55°42'15.10"

Components:
		m₁	m₂	ρ	θ	Year
	AB	6m3	6m3	4.5"	77°	2019



Robert Zebahl
70mm f/5.7, 33x Clearly split, equally bright, close together. Nice view.
102mm f/11, 62x, Bortle 6-, SQM-L 19.0 Very nicely split. Both components appear similarly bright and white-yellowish.

STF 974 (**)

Name:	STF974, 59 Aur
Type:	**
Constellation:	Aur
Coordinates:	06h53m01.41s / +38°52'08.90"

Components:
		m₁	m₂	ρ	θ	Year
	AB	6m1	10m2	22.2"	224°	2015
	BC	10m2	12m8	25.6"	219°	2015

Robert Zebahl
102mm f/11, 28x, Bortle 6 AB: Easy, moderate distance, pretty uneven. A appeared white-yellowish, B only as a tiny star.

STF 982 (**)

Name:	STF982, 38 Gem
Type:	**
Constellation:	Gem
Coordinates:	06h54m38.63s / +13°10'40.10"

Components:
		m₁	m₂	ρ	θ	Year
	AB	4m8	7m8	7.4"	143°	2018



Robert Zebahl
55mm f/9.1, 27x At 27x pretty tight with much fainter component. At 71x clearly separated with clear difference in brightness. Brighter component appeared slightly yellowish, the weaker one slightly bluish.
70mm f/5.7, 33x Easy to separated with noticeable difference in brightness. The fainter component appeared slightly orange, the brighter one rather white.

STF 994 (**)

Name:	STF994
Type:	**
Constellation:	Aur
Coordinates:	06h59m27.19s / +37°05'53.50"

Components:
		m₁	m₂	ρ	θ	Year
	AB	7m9	8m1	26.4"	55°	2017

Robert Zebahl
55mm f/9.1, 25x, Bortle 6, SQM-L 19.4 Well separated, large distance, slight difference in brightness.

STF 1001 (**)

Name:	STF1001
Type:	**
Constellation:	Lyn
Coordinates:	07h03m05.51s / +54°10'26.60"

Components:
		m₁	m₂	ρ	θ	Year
	AB	7m8	9m4	9.1"	66°	2019
	AC	7m8	9m3	9.9"	58°	2019
	BC	9m4	9m3	1.6"	5°	2019

Robert Zebahl
102mm f/11, 160x, Bortle 6-, SQM-L 19.0 2020-03-23: At 28x the pair A-BC is easy to separate. At 160x, the very close pair BC shows split. The component A appears slightly orange.
152mm f/5.9, 129x, Bortle 6, SQM-L 19.4 2020-03-23: At 22x, the wide pair A-BC already appears separated, but still very tight. At 69x, A appears in a subtle orange. The pair BC shows elongated and rather greenish-bluish. At 100x BC is already visible as figure '8' and almost separated, at 129x clearly separated. Components B and C are still very close together and equally bright. The color impression remains. An interesting and rewarding triple system!

STF 1007 (**)

Name:	STF1007
Type:	**
Constellation:	Gem
Coordinates:	07h00m37.12s / +12°43'24.20"

Components:
		m₁	m₂	ρ	θ	Year
	AB	7m4	11m4	14.6"	300°	2015
	AC	7m4	10m0	21.9"	244°	2015
	AD	7m4	7m7	67.7"	28°	2016

Robert Zebahl
70mm f/5.7, 22x, Bortle 6 AD: Wide separation, small difference in brightness. Slight difference in color, but difficult to describe. Component A at least seemed rather white. South of STF1007 there is also the double star HJ3288 and the star HD52976, which appears in a bright orange. Together in one field of view a beautiful sight.

STF 1009 (**)

Name:	STF1009
Type:	**
Constellation:	Lyn
Coordinates:	07h05m39.83s / +52°45'31.30"

Components:
		m₁	m₂	ρ	θ	Year
	AB	6m9	7m0	4.4"	148°	2019

Robert Zebahl
70mm f/5.7, 33x Very nice view. Equally bright components, tight.

STF 1033 (**)

Name:	STF1033
Type:	**
Constellation:	Lyn
Coordinates:	07h14m48.05s / +52°32'44.10"

Components:
		m₁	m₂	ρ	θ	Year
	AB	7m8	8m4	1.5"	278°	2017
	AC	7m8	10m2	79.6"	273°	2015

Robert Zebahl
102mm f/11, 160x, Bortle 6-, SQM-L 19.0 The pair AB appears clearly separated, but still pretty tight with a well visible difference in brightness. The faint C component is wide apart at a similar position angle.

STF 1035 (**)

Name:	STF1035
Type:	**
Constellation:	Gem
Coordinates:	07h12m01.06s / +22°16'44.50"

Components:
	m₁	m₂	ρ	θ	Year
	8m1	8m4	8.7"	40°	2018

Robert Zebahl
B 16x70 2021-02-22: Separate, but very close together. Small difference in brightness visible.

STF 1038 (**)

Name:	STF1038
Type:	**
Constellation:	Cam
Coordinates:	07h20m30.59s / +68°32'23.80"

Components:
	m₁	m₂	ρ	θ	Year
	8m2	10m3	11.5"	100°	2017

Robert Zebahl
70mm f/5.7, 57x, Bortle 6, SQM-L 19.5 2020-04-16: Easy to split with quite a significant difference in brightness. The companion appeared pretty dim.

STF 1050 (**)

Name:	STF1050
Type:	**
Constellation:	Lyn
Coordinates:	07h19m51.29s / +54°55'18.40"

Components:
		m₁	m₂	ρ	θ	Year
	AB	8m1	8m8	19.3"	21°	2017

Robert Zebahl
70mm f/5.7, 22x Rather faint, obviously split with visible difference in brightness. View similar to STF 1062.
102mm f/11, 28x, Bortle 6-, SQM-L 19.0

STF 1062 (**)

Name:	STF1062, 19 Lyn
Type:	**
Constellation:	Lyn
Coordinates:	07h22m52.06s / +55°16'53.30"

Components:
		m₁	m₂	ρ	θ	Year
	AB	5m8	6m7	14.8"	316°	2018

Robert Zebahl
70mm f/5.7, 22x Clearly separated, moderate distance, noticeable difference in brightness. The colors seemed different, but not exactly definable.
102mm f/11, 28x, Bortle 6-, SQM-L 19.0
152mm f/5.9, 22x, Bortle 6, SQM-L 19.4 Easy to separate, but still quite close together with visible difference in brightness. Color wise unremarkable.

STF 1065 (**)

Name:	STF1065, 20 Lyn
Type:	**
Constellation:	Lyn
Coordinates:	07h22m15.11s / +50°08'55.70"

Components:
	m₁	m₂	ρ	θ	Year
	7m5	7m7	14.9"	256°	2017

Robert Zebahl
70mm f/5.7, 22x Nicely split, moderate distance, similarly bright.

STF 1066 (**)

Name:	STF1066, delta Gem, 55 Gem
Type:	**
Constellation:	Gem
Coordinates:	07h20m07.39s / +21°58'56.40"

Components:
	m₁	m₂	ρ	θ	Year
	3m5	8m2	5.4"	234°	2017



Robert Zebahl
55mm f/9.1, 71x Large difference in brightness. The fainter component was well separated, but just a very tiny star.
102mm f/11, 160x, Bortle 7, SQM-L 18.8, Seeing 3-4/5 Easy to separate with relatively large distance. The companion appeared as a tiny, faint star.

STF 1081 (**)

Name:	STF1081
Type:	**
Constellation:	Gem
Coordinates:	07h24m08.94s / +21°27'28.00"

Components:
		m₁	m₂	ρ	θ	Year
	AB	7m7	8m5	1.9"	234°	2019
	AC	7m7	9m9	107.0"	63°	2015

Robert Zebahl
102mm f/11, 86x, Bortle 6 AB: At 86x just separated, very close together with moderate difference in brightness. In relation to A, the components B & C are almost opposite each other. At 125x, A & B are easy to split.
102mm f/11, 28x, Bortle 6 AC: Rather wide apart from component A with noticeable difference in brightness. Less conspicuous.

STF 1083 (**)

Name:	STF1083
Type:	**
Constellation:	Gem
Coordinates:	07h25m35.30s / +20°29'42.60"

Components:
	m₁	m₂	ρ	θ	Year
	7m3	8m1	6.8"	45°	2015

Robert Zebahl
70mm f/5.7, 22x Unequal pair. At 22x very tight, at 44x well split. Fainter companion appeared slightly orange, brighter one white-bluish.

STF 1094 (**)

Name:	STF1094
Type:	**
Constellation:	Gem
Coordinates:	07h27m25.99s / +15°18'59.00"

Components:
	m₁	m₂	ρ	θ	Year
	7m6	8m5	2.5"	97°	2019

Robert Zebahl
70mm f/5.7, 57x At 57x barely split with noticeable difference in brightness. At 100x well split, but still tight.

STF 1108 (**)

Name:	STF1108
Type:	**
Constellation:	Gem
Coordinates:	07h32m50.63s / +22°53'15.40"

Components:
	m₁	m₂	ρ	θ	Year
	6m6	8m2	11.7"	179°	2017

Robert Zebahl
B 16x70 2021-02-22: Separated with clearly visible brightness difference. The primary component appeared whitish, the companion appeared slightly separated only as a very faint tiny star.

STF 1110 (**)

Name:	STF1110, alpha Gem, 66 Gem, Castor
Type:	**
Constellation:	Gem
Coordinates:	07h34m35.86s / +31°53'17.80"

Components:
		m₁	m₂	ρ	θ	Year
	AB	1m9	3m0	5.4"	53°	2019
	AC	1m9	9m8	69.8"	163°	2017
	AD	1m9	10m1	179.8"	221°	2017



Robert Zebahl
55mm f/9.1, 27x AB: At 27x slight difference in brightness visible. Double star appeared as '8'. At 38x clearly split, but tight.
70mm f/5.7, 44x, Bortle 6 AB: At 44x the double star appeared as an '8'. At 100x clearly split with noticeable difference in brightness. Both components appeared white.

STF 1121 (**)

Name:	STF1121
Type:	**
Constellation:	Pup
Coordinates:	07h36m36.06s / -14°29'03.70"

Components:
		m₁	m₂	ρ	θ	Year
	AB	6m9	7m3	7.2"	306°	2015

Robert Zebahl
152mm f/8, 30x, Bortle 4, SQM-L 21.1 Fantastic view of the double star in the middle of the beautiful star cluster Messier 47! Bright, moderate separation with little difference in brightness.

STF 1122 (**)

Name:	STF1122
Type:	**
Constellation:	Cam
Coordinates:	07h45m52.47s / +65°09'28.10"

Components:
	m₁	m₂	ρ	θ	Year
	7m8	7m8	14.4"	185°	2017

Robert Zebahl
70mm f/5.7, 31x, Bortle 6, SQM-L 19.5 2020-05-15: At 22x immediately apparent with a beautiful separation between the equally bright components. One component appeared slightly bluish, the other light orange. At 44x the subtle color difference can be seen a bit better. The double star is in a nice star field together with 51 Cam.

STF 1127 (**)

Name:	STF1127
Type:	**
Constellation:	Cam
Coordinates:	07h47m00.43s / +64°03'07.30"

Components:
		m₁	m₂	ρ	θ	Year
	AB	7m0	8m4	5.6"	340°	2019
	AC	7m0	9m7	11.7"	179°	2017
	BC	8m4	9m7	17.0"	173°	2017

Robert Zebahl
70mm f/5.7, 57x, Bortle 6, SQM-L 19.5 2020-04-15: At 31x all three components are visible, with B still very close to component A. Component C is rather dim overall. At 57x, A appears white-yellowish, B slightly orange.

STF 1140 (**)

Name:	STF1140
Type:	**
Constellation:	Gem
Coordinates:	07h48m22.61s / +18°20'12.40"

Components:
	m₁	m₂	ρ	θ	Year
	7m0	8m7	6.4"	273°	2015

Robert Zebahl
70mm f/5.7, 44x Easy to separate with quite clear difference in brightness.

STF 1171 (**)

Name:	STF1171
Type:	**
Constellation:	Cnc
Coordinates:	08h01m00.78s / +23°34'59.20"

Components:
	m₁	m₂	ρ	θ	Year
	6m5	9m9	2.0"	326°	2015

Robert Zebahl
102mm f/11, 187x Observation from the city at half moon. At magnifications between 187x and 280x I could see the very dim companion almost permanently near the first diffraction ring. But the diffraction ring itself was hardly visible. Main problem here was probably the low brightness of the companion.

STF 1177 (**)

Name:	STF1177, 17 Cnc
Type:	**
Constellation:	Cnc
Coordinates:	08h05m37.06s / +27°31'46.90"

Components:
	m₁	m₂	ρ	θ	Year
	6m7	7m4	3.6"	350°	2019

Robert Zebahl
70mm f/5.7, 57x, Bortle 6- Easy to separate, but still relatively close together. Well visible difference in brightness. Color of the components was not clearly visible. Nice view overall.

STF 1187 (**)

Name:	STF1187
Type:	**
Constellation:	Cnc
Coordinates:	08h09m30.45s / +32°13'18.80"

Components:
		m₁	m₂	ρ	θ	Year
	AB	7m2	8m0	3.1"	20°	2019



Robert Zebahl
70mm f/5.7, 57x, Bortle 6- Split. Components very tight with noticeable difference in brightness.

STF 1193 (**)

Name:	STF1193
Type:	**
Constellation:	UMa
Coordinates:	08h20m40.32s / +72°24'26.00"

Components:
		m₁	m₂	ρ	θ	Year
	AB	6m2	9m7	42.4"	90°	2015
	BC	9m8	12m7	58.8"	6°	2015

Robert Zebahl
70mm f/5.7, 22x, Bortle 6, SQM-L 19.3 AB: 2020-04-21: Beautifully separated with much fainter companion. The primary component shines in a bright, refreshing yellow. Rewarding!

STF 1196 & HUT 1 (**)

Name:	STF1196 & HUT1, zeta Cnc, 16 Cnc
Type:	**
Constellation:	Cnc
Coordinates:	08h12m12.79s / +17°38'51.20"

Components:
		m₁	m₂	ρ	θ	Year
STF1196	AC	5m3	5m8	6.3"	51°	2019
STF1196	AB-C	4m9	5m8	6.0"	64°	2018
STF1196	AB	5m3	6m2	1.1"	9°	2018
HUT1	Ca-Cb	6m2	7m1	0.3"	233°	2018



Robert Zebahl
70mm f/5.7, 133x, Bortle 6- The wide pair AB-C is already separable at 22x. The pair AB shows at 133x two clearly overlapping diffraction disks with small difference in brightness, but without any notch.
102mm f/11, 86x, Bortle 6-, SQM-L 19.2 AB-C: Easy to separate. A: light grey, B: pale orange.
120mm f/5, 67x, Bortle 6, SQM-L 19.3 AB-C: Evident difference in brightness, easy to split. Both components of similar color.
120mm f/5, 200x, Bortle 6, SQM-L 19.3 AB: Very tight. The Airy disks were still touching. Slight difference in brightness. Extremely beautiful triple star!

STF 1245 (**)

Name:	STF1245
Type:	**
Constellation:	Cnc
Coordinates:	08h35m51.05s / +06°37'13.90"

Components:
		m₁	m₂	ρ	θ	Year
	AB	6m0	7m2	10.1"	25°	2018
	AC	6m0	10m7	100.4"	109°	2017
	AD	6m0	11m9	110.3"	292°	2017
	AE	6m0	9m6	114.8"	207°	2017

Robert Zebahl
70mm f/5.7, 57x, Bortle 6- AB at 22x separated, but very close, uneven pair. A appeared white-yellowish, B orange, partly reddish. Opposite in a wide separation the fainter component E was visible. At 57x, A appeared white-yellowish, B orange.

STF 1258 (**)

Name:	STF1258
Type:	**
Constellation:	UMa
Coordinates:	08h43m25.41s / +48°51'41.90"

Components:
	m₁	m₂	ρ	θ	Year
	7m7	7m9	10.0"	330°	2017

Robert Zebahl
B 16x70, Bortle 7, SQM-L 18.6 2020-07-05: Immediately visible as a double star, separated but pretty close with similar bright components.
70mm f/5.7, 22x, Seeing 3/5 Easy to separate at 22x, similarly bright components at moderate distance. At 57x very small difference in brightness noticeable. The components appeared slightly orange and white-bluish, with the color changing from one component to another. A very strange effect, which I observed several times.

STF 1268 (**)

Name:	STF1268, iota Cnc, 48 Cnc
Type:	**
Constellation:	Cnc
Coordinates:	08h46m41.82s / +28°45'35.60"

Components:
	m₁	m₂	ρ	θ	Year
	4m1	6m0	30.7"	308°	2018

Robert Zebahl
70mm f/5.7, 22x, Bortle 6, SQM-L 19.4 Striking, widely separated with noticeable difference in brightness. Moderate but beautiful color contrast: white-yellowish and grey-bluish.
102mm f/11, 28x Grand sight! Pretty wide apart and unequal. A: mild orange, B: very nice light blue.

STF 1275 (**)

Name:	STF1275
Type:	**
Constellation:	UMa
Coordinates:	08h51m26.19s / +57°31'38.10"

Components:
		m₁	m₂	ρ	θ	Year
	AB	8m7	8m9	1.9"	198°	2019

Robert Zebahl
70mm f/5.7, 100x At 100x and 150x not permanently split. Components very close together.

STF 1280 (**)

Name:	STF1280
Type:	**
Constellation:	UMa
Coordinates:	08h55m24.82s / +70°47'39.20"

Components:
		m₁	m₂	ρ	θ	Year
	AB	8m8	9m1	3.4"	358°	2018
	AC	8m8	12m4	398.4"	88°	2015
	BC	9m1	12m4	398.5"	88°	2015



Robert Zebahl
70mm f/5.7, 67x, Bortle 6, SQM-L 19.2 AB: 2021-04-03: Rather faint double star with components still pretty close together and little difference in brightness.

STF 1282 (**)

Name:	STF1282
Type:	**
Constellation:	Lyn
Coordinates:	08h50m44.28s / +35°04'15.40"

Components:
		m₁	m₂	ρ	θ	Year
	AB	7m6	7m8	3.5"	279°	2019

Robert Zebahl
70mm f/5.7, 57x, Bortle 6, SQM-L 19.4 Clearly separated, but close together with very little difference in brightness. The double star forms an acute-angled triangle together with two other stars.

STF 1289 (**)

Name:	STF1289
Type:	**
Constellation:	Lyn
Coordinates:	08h54m44.33s / +43°35'04.70"

Components:
	m₁	m₂	ρ	θ	Year
	8m2	8m9	3.7"	7°	2019

Robert Zebahl
70mm f/5.7, 57x, Bortle 6, SQM-L 19.4 Quite faint double star, but easy to separate with a noticeable difference in brightness and close components.

STF 1291 (**)

Name:	STF1291, 57 Cnc
Type:	**
Constellation:	Cnc
Coordinates:	08h54m14.65s / +30°34'45.80"

Components:
		m₁	m₂	ρ	θ	Year
	AB	6m1	6m4	1.6"	309°	2019
	AB-C	5m5	9m2	54.6"	204°	2015



Robert Zebahl
70mm f/5.7, 133x, Bortle 6, SQM-L 19.4 AB: Immediately apparent as a double star. Diffraction disks overlapping slightly ('8'). Difference in brightness visible.

STF 1294 & SIN 41 (**)

Name:	STF1294 & SIN41
Type:	**
Constellation:	Cnc
Coordinates:	08h57m17.08s / +32°53'57.90"

Components:
		m₁	m₂	ρ	θ	Year
STF1294	AB	9m0	10m8	15.6"	340°	2015
SIN41	AC	9m0	12m6	191.3"	285°	2015

Robert Zebahl
102mm f/11, 28x, Bortle 6-, SQM-L 19.0 STF1294 (AB): At 28x relatively widely separated and rather less striking near the bright star sigma 2 Cnc. Component A appeared slightly orange, the companion only as a dim star. Similar view at 86x.

STF 1296 (**)

Name:	STF1296
Type:	**
Constellation:	Lyn
Coordinates:	08h59m16.74s / +34°56'46.90"

Components:
	m₁	m₂	ρ	θ	Year
	9m1	9m9	1.9"	76°	2019

Robert Zebahl
102mm f/11, 160x, Bortle 6-, SQM-L 19.0 Overall quite faint double star, but clearly separated with a moderate difference in brightness. Both components are still pretty close together.

STF 1298 (**)

Name:	STF1298, 66 Cnc
Type:	**
Constellation:	Cnc
Coordinates:	09h01m24.13s / +32°15'08.30"

Components:
		m₁	m₂	ρ	θ	Year
	AB	6m0	8m6	4.4"	137°	2017
	AC	6m0	12m0	187.6"	318°	2015

Robert Zebahl
70mm f/5.7, 80x, Bortle 6, SQM-L 19.4 AB: At 67x and 80x the companion is visible as a very faint star close to the main component. At 133x it is only visible as a slightly blurred tiny star just outside the first diffraction ring of the primary component.
102mm f/11, 62x, Bortle 6-, SQM-L 19.0 AB: At 62x clearly separated, significant difference in brightness. The companion can be seen well as a faint little star, apart from the primary component. At 125x easy to split. Component A appeared rather white.

STF 1306 (**)

Name:	STF1306, sigma 2 UMa, 13 UMa
Type:	**
Constellation:	UMa
Coordinates:	09h10m23.53s / +67°08'03.30"

Components:
		m₁	m₂	ρ	θ	Year
	AB	4m9	8m8	4.3"	348°	2016
	AC	4m9	10m3	197.8"	148°	2003



Robert Zebahl
70mm f/5.7, 100x, Seeing 3/5 AB: Companion almost permanently visible as elongated, non-condensed brightening of the first diffraction ring of the primary component at the correct position angle.

STF 1312 (**)

Name:	STF1312
Type:	**
Constellation:	UMa
Coordinates:	09h10m18.19s / +52°23'05.70"

Components:
	m₁	m₂	ρ	θ	Year
	8m3	8m8	4.8"	148°	2017

Robert Zebahl
70mm f/5.7, 44x, Bortle 6, SQM-L 19.6 2020-04-19: At 22x clearly elongated, at 31x instantly visible as '8', sometimes barely separated. At 44x clearly separated with little difference in brightness. For the perception of colors the double star was too faint. Together with STF 1321 visible in one field of view.

STF 1315 (**)

Name:	STF1315
Type:	**
Constellation:	UMa
Coordinates:	09h12m45.94s / +61°40'32.70"

Components:
	m₁	m₂	ρ	θ	Year
	7m3	7m7	24.9"	27°	2017

Robert Zebahl
70mm f/5.7, 22x, Seeing 3/5 Medium bright double star, easy to separate with attractive distance and slight difference in brightness. Together with 16 UMa in one field of view. The brighter component appeared slightly orange, the fainter one showed a hint of blue. However, the colors of the components changed over time. At 57x similar view.

STF 1318 (**)

Name:	STF1318
Type:	**
Constellation:	UMa
Coordinates:	09h13m38.79s / +46°59'25.30"

Components:
	m₁	m₂	ρ	θ	Year
	7m8	9m5	2.4"	228°	2018

Robert Zebahl
70mm f/5.7, 133x, Bortle 6, SQM-L 19.4 Separated with clear difference in brightness. The faint companion is slightly outside the first diffraction ring of the primary component.

STF 1321 (**)

Name:	STF1321
Type:	**
Constellation:	UMa
Coordinates:	09h14m22.79s / +52°41'11.80"

Components:
		m₁	m₂	ρ	θ	Year
	AB	7m8	7m9	17.0"	98°	2018
	AC	7m8	14m5	145.7"	64°	2010
	AD	7m8	11m9	136.4"	129°	2015



Robert Zebahl
B 16x70, Bortle 7, SQM-L 18.6 AB: 2020-07-05: Very nice view, striking, easily separable. A slight difference in brightness is visible. At first glance the double star appeared noticeably orange compared to the surrounding stars, on closer look a color difference of the two components was visible: orange & rather white.
70mm f/5.7, 22x, Bortle 6 AB: 2020-04-11: At 22x pretty wide pair with equally bright components. Striking colors: slightly orange & white-bluish, but it was a bit difficult to assign the colors to the components. At 44x slightly better color perception.
70mm f/5.7, 31x, Bortle 6, SQM-L 19.6 AB: 2020-04-19: Together with STF1312 in one field of view. At 22x very nice sight, easy to separate, attractive separation. Immediately apparent. A color difference is visible: dark yellow, orange. Also beautiful to see at 44x. Best view at 31x.

STF 1331 (**)

Name:	STF1331
Type:	**
Constellation:	UMa
Coordinates:	09h20m46.02s / +61°20'58.40"

Components:
		m₁	m₂	ρ	θ	Year
	AB	8m5	8m7	0.9"	153°	2017
	AC	8m5	11m6	13.5"	186°	2015
	AD	8m5	14m5	19.4"	117°	2015
	AE	8m5	9m8	139.1"	223°	2015

Robert Zebahl

152mm f/5.9, 180x, Bortle 6, SQM-L 19.4
2020-04-13: The wide pair AE is already visible at 22x with a significant difference in brightness, but quite inconspicuous. A appeared white-yellowish, E rather orange. The close pair AB appeared immediately elongated at 129x, partly visible as '8'. At 180x, AB was just separated with a fine black space between them. The faint C component was only visible with averted vision. Best view at 180x. The even fainter D component was out of range.

STF 1333 (**)

Name:	STF1333
Type:	**
Constellation:	Lyn
Coordinates:	09h18m25.97s / +35°21'51.30"

Components:
	m₁	m₂	ρ	θ	Year
	6m6	6m7	1.9"	50°	2017

Robert Zebahl
63mm f/13.3, 120x At 93x seen as '8', at 120x split, but pretty tight with no visible difference in brightness.

STF 1334 (**)

Name:	STF1334, 38 Lyn
Type:	**
Constellation:	Lyn
Coordinates:	09h18m50.64s / +36°48'09.30"

Components:
		m₁	m₂	ρ	θ	Year
	AB	3m9	6m1	2.5"	229°	2017



Robert Zebahl
63mm f/13.3, 140x Fainter companion only seen as permanent brightening on the first diffraction ring.

STF 1344 (**)

Name:	STF1344
Type:	**
Constellation:	LMi
Coordinates:	09h23m28.35s / +39°08'05.10"

Components:
	m₁	m₂	ρ	θ	Year
	9m0	9m5	3.8"	104°	2018

Robert Zebahl
120mm f/5, 75x, Bortle 7+, NELM 5m0, SQM-L 18.8 At 50x and 75x split, but tight with little difference in brightness.

STF 1346 (**)

Name:	STF1346
Type:	**
Constellation:	UMa
Coordinates:	09h25m37.88s / +54°00'57.50"

Components:
		m₁	m₂	ρ	θ	Year
	AB	7m7	8m6	5.8"	314°	2017
	BC	8m6	11m8	93.9"	188°	2015

Robert Zebahl
70mm f/5.7, 44x, Bortle 6, SQM-L 19.6 AB: 2020-04-19: At 31x very tight with clear difference in brightness. At 44x very fine separation. Component A appeared creamy white, B partly slightly orange.

STF 1347 (**)

Name:	STF1347
Type:	**
Constellation:	Hya
Coordinates:	09h23m15.76s / +03°30'05.00"

Components:
	m₁	m₂	ρ	θ	Year
	7m3	8m3	21.1"	312°	2016

Robert Zebahl
70mm f/5.7, 22x, Bortle 6 2020-04-10: At 22x beautifully separated at moderate separation and difference in brightness. Primary component appeared white-bluish, companion slightly orange. At 44x the primary component looked more white-yellowish, the companion showed a clear tendency to orange.

STF 1348 (**)

Name:	STF1348
Type:	**
Constellation:	Hya
Coordinates:	09h24m28.48s / +06°21'01.80"

Components:
		m₁	m₂	ρ	θ	Year
	AB	7m5	7m6	2.0"	314°	2018

Robert Zebahl
70mm f/5.7, 100x, Bortle 6 2020-04-10: At 67x clearly elongated, at 80x clearly visible as figure '8'. At 100x a very small difference in brightness was to be guessed, at 133x visible. Near the double star STF 1355.

STF 1349 (**)

Name:	STF1349
Type:	**
Constellation:	UMa
Coordinates:	09h31m09.89s / +67°32'28.40"

Components:
	m₁	m₂	ρ	θ	Year
	7m5	9m0	19.2"	166°	2015

Robert Zebahl
70mm f/5.7, 22x, Bortle 6, SQM-L 19.6 2020-04-19: At 22x easy to separate with significant difference in brightness. The primary component appears whitish, the companion darker. At 44x, the primary component looks rather white-yellowish, the companion greyish.

STF 1350 (**)

Name:	STF1350
Type:	**
Constellation:	UMa
Coordinates:	09h34m19.56s / +66°47'42.30"

Components:
		m₁	m₂	ρ	θ	Year
	AB	8m3	8m3	10.2"	249°	2015
	AC	8m3	9m2	131.0"	216°	2015

Robert Zebahl
70mm f/5.7, 22x, Bortle 6, SQM-L 19.6 2020-04-19: At 22x A & B equally bright and still pretty close together. Component C is visible at a much greater distance. At 44x, A & B show a color difference: orange, white-bluish.
152mm f/5.9, 100x, Bortle 6-, SQM-L 19.1 At 22x, all three components are already visible, with A & B still standing quite close together. Component C is less prominent. At 69x and 100x, the pair AB shows a nice color contrast: The eastern component mostly appeared in a slightly shiny orange, while the other component appeared more white-bluish. During the observation, however, the colors changed between both components. At the time of observation, the pretty bright comet C/2019 Y4 Atlas was also in the same field of view - a great scene! Note to the sketch: The positions of the stars to each other do not exactly match, also the alignment of the pair AB to C.

STF 1351 (**)

Name:	STF1351, 23 UMa
Type:	**
Constellation:	UMa
Coordinates:	09h31m31.57s / +63°03'42.50"

Components:
		m₁	m₂	ρ	θ	Year
	AB	3m6	9m2	22.7"	267°	2015
	AC	3m7	11m8	107.4"	232°	2015

Robert Zebahl
70mm f/5.7, 22x AB: 2020-04-07: Well separable with a significant difference in brightness, where the companion appearing only as a tiny star close to the primary component. The primary component itself appeared bright and rather whitish.

STF 1355 (**)

Name:	STF1355
Type:	**
Constellation:	Hya
Coordinates:	09h27m16.69s / +06°13'59.00"

Components:
	m₁	m₂	ρ	θ	Year
	7m7	7m8	1.8"	357°	2018



Robert Zebahl
70mm f/5.7, 100x, Bortle 6 2020-04-10: At 67x clearly elongated, equally bright. At 80x detectable notch. At 100x and 133x clearly visible as figure '8'. Near the double star STF 1348.

STF 1362 (**)

Name:	STF1362
Type:	**
Constellation:	Dra
Coordinates:	09h37m56.18s / +73°04'49.50"

Components:
	m₁	m₂	ρ	θ	Year
	7m0	7m2	4.9"	125°	2017



Robert Zebahl
70mm f/5.7, 31x, Bortle 6, SQM-L 19.3 2020-04-21: At 22x extremely tight, but separable. At 31x very fine separation. Both components appeared white. Very nice sight! At 57x well separated, similarly bright. One component appeared white-yellowish with a hint of orange, the other more white.

STF 1374 (**)

Name:	STF1374
Type:	**
Constellation:	LMi
Coordinates:	09h41m21.88s / +38°57'01.90"

Components:
		m₁	m₂	ρ	θ	Year
	AB	7m3	8m7	2.8"	311°	2017



Robert Zebahl
70mm f/5.7, 100x 2020-04-01: Separable at 67x, but difficult due to the bright primary component. Clearly separable at 80x and higher magnifications with a significant difference in brightness. The companion stands close to the primary component and appears as a tiny star. Nice view.
120mm f/5, 168x, Bortle 7+, NELM 5m0, SQM-L 18.8 At 50x elongated, at 75x seen as '8'. At 168x clearly split with obviously fainter component.

STF 1399 (**)

Name:	STF1399
Type:	**
Constellation:	Leo
Coordinates:	09h57m02.21s / +19°45'44.60"

Components:
	m₁	m₂	ρ	θ	Year
	7m7	8m4	30.2"	176°	2017

Robert Zebahl
70mm f/5.7, 22x Easy to split with nice distance and obviously unequal. A conspicuous group of fainter stars is nearby. Main component appeared in a warm-white, fainter somehow darker (partly bluish, partly slightly orange).

STF 1415 (**)

Name:	STF1415
Type:	**
Constellation:	UMa
Coordinates:	10h17m50.61s / +71°03'38.90"

Components:
		m₁	m₂	ρ	θ	Year
	AB	6m7	7m3	16.6"	168°	2018
	AC	6m7	10m8	153.3"	13°	2015

Robert Zebahl
70mm f/5.7, 22x AB: 2020-04-07: At 22x immediately noticeable as double star, medium bright with rather small difference in brightness. A appeared whitish, B slightly orange, partly brownish. At 44x similar color impression: A white-bluish, B slightly orange.
70mm f/5.7, 44x, Bortle 6, SQM-L 19.2 AB: 2021-04-03: At 12x easily separated, moderate brightness difference, unspectacular. At 44x, A appeared pale yellowish, B in very light blue. The color contrast was very subtle.

STF 1424 (**)

Name:	STF1424, gamma Leo, 41 Leo, Algieba
Type:	**
Constellation:	Leo
Coordinates:	10h19m58.35s / +19°50'29.40"

Components:
		m₁	m₂	ρ	θ	Year
	AB	2m4	3m6	4.9"	126°	2019



Robert Zebahl
55mm f/9.1, 38x, Bortle 6-, SQM-L 19.1 At 38x split, but very tight with noticeable difference in brightness. At 56x and higher beautiful view of both components, which seemed to have similar colors.
55mm f/9.1, 59x, Bortle 6, SQM-L 19.5 Very nice unequal double. A appeared yellow-orange, B rather white-bluish.
70mm f/5.7, 100x, Bortle 6- At 67x still a relatively close pair, but well separated with quite a clear difference in brightness. At 100x easy to separate and visible color difference: A yellowish to slightly orange, B white-yellowish.
102mm f/11, 125x, Bortle 7, SQM-L 18.8, Seeing 3/5 Very nicely separated with wonderful contrast in brightness and color. Primary component slightly orange, companion yellowish.
120mm f/5, 66x, Bortle 6-, SQM-L 19.1 At 48x easily seen as double star. It appeared as '8'. At 66x pretty tight with visible difference in brightness.

STF 1426 (**)

Name:	STF1426
Type:	**
Constellation:	Leo
Coordinates:	10h20m32.32s / +06°25'47.60"

Components:
		m₁	m₂	ρ	θ	Year
	AB-C	7m3	9m4	7.6"	9°	2018
	AB	8m0	8m3	0.9"	313°	2018



Robert Zebahl
102mm f/11, 160x, Bortle 6- AB-C: Quite large angular distance and therefor easy to separate. The C component was pretty faint.
102mm f/11, 160x, Bortle 6- AB: At first glance elongated, on closer look visible as '8'.

STF 1427 (**)

Name:	STF1427
Type:	**
Constellation:	UMa
Coordinates:	10h22m00.53s / +43°54'19.30"

Components:
	m₁	m₂	ρ	θ	Year
	8m2	8m5	9.3"	215°	2018

Robert Zebahl
70mm f/5.7, 22x, Bortle 6, SQM-L 19.6 2020-04-19: At 22x very fine separated, but still tight. A very small difference in brightness was visible. At 44x also a nice view. In both magnifications I could see color differences: pale orange, grey-blue.

STF 1431 (**)

Name:	STF1431
Type:	**
Constellation:	Leo
Coordinates:	10h25m35.12s / +08°46'35.40"

Components:
	m₁	m₂	ρ	θ	Year
	7m8	9m1	3.6"	76°	2019

Robert Zebahl
70mm f/5.7, 67x Separable at 67x, but very close together with a clear difference in brightness. Easy to separate at 100x. Next to it the star 44 Leo shines in a striking, bright orange.

STF 1443 (**)

Name:	STF1443
Type:	**
Constellation:	LMi
Coordinates:	10h33m17.07s / +37°40'25.00"

Components:
	m₁	m₂	ρ	θ	Year
	9m9	10m0	5.3"	161°	2018

Robert Zebahl
120mm f/5, 50x, Bortle 7+, NELM 5m0, SQM-L 18.8 At 50x split with little distance. At 75x clearly split with small difference in brightness.

STF 1447 (**)

Name:	STF1447
Type:	**
Constellation:	Leo
Coordinates:	10h33m47.28s / +23°21'02.40"

Components:
	m₁	m₂	ρ	θ	Year
	7m5	8m9	4.6"	124°	2019

Robert Zebahl
70mm f/5.7, 67x, Bortle 6 2020-04-10: With 44x very tight, uneven pair. The primary component appears whitish with a very faint companion. At 67x the faint companion is clearly visible, but still standing close to the primary component.

STF 1450 (**)

Name:	STF1450, 49 Leo
Type:	**
Constellation:	Leo
Coordinates:	10h35m02.16s / +08°39'01.60"

Components:
	m₁	m₂	ρ	θ	Year
	5m8	7m9	2.2"	156°	2017

Robert Zebahl
70mm f/5.7, 133x B component appeared as clear brightening on the first diffraction ring of the primary component in the correct position angle.

STF 1459 (**)

Name:	STF1459
Type:	**
Constellation:	LMi
Coordinates:	10h40m12.46s / +38°24'11.40"

Components:
	m₁	m₂	ρ	θ	Year
	8m3	8m8	4.6"	153°	2019

Robert Zebahl
120mm f/5, 50x, Bortle 7+, NELM 5m0, SQM-L 18.8 Clearly split with noticeable difference in brightness.

STF 1460 (**)

Name:	STF1460
Type:	**
Constellation:	UMa
Coordinates:	10h40m35.04s / +42°09'11.60"

Components:
	m₁	m₂	ρ	θ	Year
	8m7	8m9	3.9"	161°	2019

Robert Zebahl
70mm f/5.7, 57x, Bortle 6, SQM-L 19.6 2020-04-19: At 44x clearly visible as '8', overall quite faint and almost separated. The components seemed equally bright. At 57x separated, equally bright.

STF 1466 (**)

Name:	STF1466, 35 Sex
Type:	**
Constellation:	Sex
Coordinates:	10h43m20.91s / +04°44'51.60"

Components:
		m₁	m₂	ρ	θ	Year
	AB	6m2	7m1	6.9"	241°	2018

Robert Zebahl
102mm f/11, 28x, Bortle 6-, SQM-L 18.8 Very nice view. At 28x obviously unequal and easy to split. A appeared slightly orange. At 86x B appeared grey-blue.

STF 1476 (**)

Name:	STF1476, 40 Sex
Type:	**
Constellation:	Sex
Coordinates:	10h49m17.31s / -04°01'23.80"

Components:
	m₁	m₂	ρ	θ	Year
	7m1	7m8	2.4"	17°	2017

Robert Zebahl
70mm f/5.7, 100x, Seeing 3-4/5 2020-03-31: At 67x very tightly separated, uneven pair. Also at 100x still rather close together. The companion appears only as a tiny star.

STF 1487 (**)

Name:	STF1487, 54 Leo
Type:	**
Constellation:	Leo
Coordinates:	10h55m36.80s / +24°44'59.00"

Components:
	m₁	m₂	ρ	θ	Year
	4m5	6m3	6.8"	112°	2019

Robert Zebahl
55mm f/9.1, 27x At 27x split, but very tight with noticeable difference in brightness. At 71x easy to separate. No visible color difference.
70mm f/5.7, 67x, Bortle 6- 2021-04-13: At 67x beautifully separated with clearly visible difference in brightness. Very attractive is the subtle color difference: light yellow & light blue. At 133x the color of the companion is a bit more pale: gray-blue. The primary component still shines in a beautiful light yellow.

STF 1504 (**)

Name:	STF1504
Type:	**
Constellation:	Leo
Coordinates:	11h03m58.93s / +03°38'19.30"

Components:
	m₁	m₂	ρ	θ	Year
	7m9	8m1	1.2"	126°	2018

Robert Zebahl
70mm f/5.7, 133x, Seeing 3-4/5 2020-03-31: The double star might have appeared slightly elongated. But observation is too uncertain.
102mm f/11, 160x, Bortle 6, SQM-L 19.1, Seeing 4/5 2020-03-28: At 125x clearly visible as figure '8'. Both components appeared similarly bright. At 160x and 187x the diffraction disks were touching each other slightly.

STF 1505 (**)

Name:	STF1505
Type:	**
Constellation:	UMa
Coordinates:	11h05m41.23s / +62°37'01.50"

Components:
		m₁	m₂	ρ	θ	Year
	AB	8m9	10m6	8.2"	312°	2015
	AC	8m9	12m0	217.7"	177°	2015

Robert Zebahl
70mm f/5.7, 80x, Bortle 6, NELM 5m0+ AB: 2020-04-14: Easy split with pretty dim companion.

STF 1517 & BU 1431 (**)

Name:	STF1517 & BU1431, WDS11137+2008
Type:	**
Constellation:	Leo
Coordinates:	11h13m40.99s / +20°07'43.30"

Components:
		m₁	m₂	ρ	θ	Year
STF1517	AB	7m5	8m0	0.7"	314°	2017
BU1431	AB-C	7m5	10m8	246.1"	97°	2015



Robert Zebahl
102mm f/11, 187x, Bortle 6, SQM-L 19.1, Seeing 4/5 STF1517 (AB): 2020-03-28: At 187x the double star immediately appears elongated, but without notching. On closer observation, the slight difference in brightness could be detected. Not better at higher magnifications. Observation at quite good seeing (4/5).
152mm f/5.9, 225x, Bortle 7, SQM-L 18.8, Seeing 3/5 STF1517 (AB): 2020-03-27: Clearly elongated. In some moments the double star appeared notched with a small difference in brightness. Observation at moderate seeing (3/5).

STF 1520 (**)

Name:	STF1520
Type:	**
Constellation:	UMa
Coordinates:	11h16m04.03s / +52°46'23.40"

Components:
	m₁	m₂	ρ	θ	Year
	6m5	7m8	12.4"	344°	2017

Robert Zebahl
70mm f/5.7, 44x 2020-04-08: At 22x pretty tight, uneven pair. A appeared orange, B did not show any clear color. At 44x, A appeared yellowish-orange, B silvery grey, partly grey-bluish.

STF 1521 (**)

Name:	STF1521
Type:	**
Constellation:	Leo
Coordinates:	11h15m20.95s / +27°34'15.60"

Components:
	m₁	m₂	ρ	θ	Year
	7m7	8m1	3.8"	97°	2019

Robert Zebahl
70mm f/5.7, 67x, Bortle 6-, NELM 5m0, SQM-L 19.1 At 44x still very close, finely separated pair with visible difference in brightness, rather faint. At 67x nicely separated, at 100x very easy. Colors were not clearly visible.

STF 1523 (**)

Name:	STF1523, xi UMa, 53 UMa, Alula Australis
Type:	**
Constellation:	UMa
Coordinates:	11h18m10.90s / +31°31'45.00"

Components:
		m₁	m₂	ρ	θ	Year
	AB	4m3	4m8	2.1"	155°	2019



Robert Zebahl
55mm f/9.1, 83x, Bortle 6-, SQM-L 19.1 2019-02-09: Already seen as '8' at 83x. At 125x the overlapping of both Airy disks was visible, but also a slight difference in brightness.
70mm f/5.7, 100x, Bortle 6 2018-02-18: Very close together with similar brightness. At first glance seen as an '8', looking closer I partly split both components. Similar view also at 128x.
70mm f/5.7, 133x 2020-03-15: Splendid sight! Beautifully separated with almost touching diffraction disks. The rather small difference in brightness was well visible. The diffraction rings of both components coalesced.
102mm f/11, 160x 2020-03-16: Awesome! Bright with lovely, subtle diffraction rings. The distance between both components is a smaller than the diameter of the diffraction disk of the fainter component.
120mm f/5, 168x, Bortle 6, SQM-L 19.1 2018-02-14: Well split with slight difference in brightness.
152mm f/5.9, 129x, Bortle 6, NELM 5m0+ 2019-02-06: Well split with visible difference in brightness. The colors of both components appeared equal.

STF 1529 (**)

Name:	STF1529
Type:	**
Constellation:	Leo
Coordinates:	11h19m22.64s / -01°39'17.60"

Components:
	m₁	m₂	ρ	θ	Year
	7m1	7m9	9.3"	254°	2017

Robert Zebahl
B 16x70, Bortle 6-, SQM-L 19.0, Seeing 3/5 2021-03-02: Very nice view, medium bright, very finely separated with little difference in brightness. However, the double star was too faint for detecting color.

STF 1536 (**)

Name:	STF1536, iota Leo, 78 Leo
Type:	**
Constellation:	Leo
Coordinates:	11h23m55.37s / +10°31'46.90"

Components:
		m₁	m₂	ρ	θ	Year
	AB	4m1	6m7	2.2"	96°	2018
	AB-C	4m1	11m1	332.1"	346°	2015



Robert Zebahl
70mm f/5.7, 133x, Bortle 6, SQM-L 19.1, Seeing 4/5 AB: 2020-03-28: The companion was well visible as brightening on the diffraction ring of the primary component. Sketch see observation with my 102mm refractor.
102mm f/11, 125x, Bortle 6, SQM-L 19.1, Seeing 4/5 AB: 2020-03-28: At 125x clearly separated. A very beautiful sight! The companion was visible as almost round brightening close to the first diffraction ring of the primary component. The diffraction ring itself appeared very fine. At 224x also a very nice sight with a clear diffraction ring and the companion, which now appeared roundish.

STF 1537 (**)

Name:	STF1537
Type:	**
Constellation:	Leo
Coordinates:	11h24m28.94s / +20°37'16.50"

Components:
	m₁	m₂	ρ	θ	Year
	8m2	9m1	2.3"	358°	2019

Robert Zebahl
102mm f/11, Bortle 7, SQM-L 18.8, Seeing 3/5 2020-03-27: At 62x almost, at 86x clearly separated, whereby the components are still very close together. The companion appears rather dim. The slight difference in brightness is already visible at 62x. At 125x the double star shows itself clearly separated. The primary component appears more white, the companion appears a bit warmer in color.
152mm f/5.9, Bortle 7, SQM-L 18.8, Seeing 3/5 2020-03-27: At 49x the double star presents itself clearly elongated, at 69x it is almost separable. The two diffraction disks are well visible. At 100x very nicely separated at still quite small separation. The primary component appears rather white, the companion shows up in a warmer hue. A moderate difference in brightness is visible.

STF 1540 (**)

Name:	STF1540, 83 Leo
Type:	**
Constellation:	Leo
Coordinates:	11h26m45.32s / +03°00'47.20"

Components:
		m₁	m₂	ρ	θ	Year
	AB	6m5	7m5	28.4"	150°	2018

Robert Zebahl
B 16x70, Bortle 6-, SQM-L 19.0, Seeing 3/5 2021-03-02: Splendid sight together with the double star tau Leo as well as 82 Leo. Beautiful star field. 83 Leo very nicely separated with moderate difference in brightness. Yellowish orange & slightly orange.
55mm f/9.1, 16x, Bortle 6, SQM-L 19.5 Wonderful double with slight color contrast in a very nice field. Together with tau Leo stunning view. Slightly unequal. A appeared white-yellowish, B rather grey-bluish.

STF 1544 (**)

Name:	STF1544
Type:	**
Constellation:	UMa
Coordinates:	11h31m18.57s / +59°42'03.30"

Components:
	m₁	m₂	ρ	θ	Year
	7m3	8m0	12.2"	91°	2016

Robert Zebahl
70mm f/5.7, 22x, Bortle 6, SQM-L 19.6 2020-04-19: At 22x beautifully separated, moderately bright with visible difference in brightness. The components are still quite close together and appear white-bluish and slightly orange. At 31x same color impression.

STF 1546 (**)

Name:	STF1546
Type:	**
Constellation:	UMa
Coordinates:	11h32m20.34s / +56°05'43.30"

Components:
	m₁	m₂	ρ	θ	Year
	7m5	10m3	11.5"	349°	2015

Robert Zebahl
70mm f/5.7, 31x, Bortle 6, SQM-L 19.6 2020-04-19: Separated with a clear difference in brightness - the companion was rather dim. The primary component appeared creamy white.

STF 1547 (**)

Name:	STF1547, 88 Leo
Type:	**
Constellation:	Leo
Coordinates:	11h31m44.94s / +14°21'52.20"

Components:
		m₁	m₂	ρ	θ	Year
	AB	6m3	9m1	15.5"	332°	2018



Robert Zebahl
55mm f/9.1, 42x, Bortle 6, SQM-L 19.5 Well split with moderate distance. Primary component appeared white-yellowish. Pretty unequal pair.

STF 1552 (**)

Name:	STF1552, 90 Leo
Type:	**
Constellation:	Leo
Coordinates:	11h34m42.50s / +16°47'48.90"

Components:
		m₁	m₂	ρ	θ	Year
	AC	6m3	9m8	63.4"	235°	2018
	AB	6m3	7m3	3.1"	209°	2018

Robert Zebahl
55mm f/9.1, 42x, Bortle 6, SQM-L 19.5 AB: A and B very tight and unequal. Much fainter component C very wide apart. All components almost in line. Very nice view.

STF 1553 (**)

Name:	STF1553
Type:	**
Constellation:	UMa
Coordinates:	11h36m35.69s / +56°08'07.30"

Components:
	m₁	m₂	ρ	θ	Year
	7m7	8m2	6.2"	165°	2018



Robert Zebahl
70mm f/5.7, 31x, Bortle 6, SQM-L 19.6 2020-04-19: At 22x medium bright double star with apparently similar bright components. At first sight visible as '8', on closer look separated. At 31x very fine split of the components with small difference in brightness. The two components appeared yellowish and slightly orange.

STF 1559 (**)

Name:	STF1559
Type:	**
Constellation:	UMa
Coordinates:	11h38m49.11s / +64°20'49.40"

Components:
	m₁	m₂	ρ	θ	Year
	6m8	8m0	1.9"	328°	2017

Robert Zebahl
70mm f/5.7, 133x, Bortle 6, NELM 5m0+ 2020-04-14: Two clearly visible, slightly touching diffraction disks. The fainter companion appeared somewhat more diffuse. Occasionally the double star appeared separated.

STF 1561 (**)

Name:	STF1561
Type:	**
Constellation:	UMa
Coordinates:	11h38m44.90s / +45°06'30.30"

Components:
		m₁	m₂	ρ	θ	Year
	AB	6m5	8m2	8.9"	247°	2017
	AC	6m5	9m5	176.8"	90°	2015
	AD	6m5	7m6	718.2"	76°	2015
	AE	6m5	12m1	60.7"	338°	2015



Robert Zebahl
70mm f/5.7, 44x AB: 2020-04-07: At 22x separated. The fainter companion is still very close to the primary component. At 44x beautiful sight with a clear difference in brightness. A: slightly yellowish, B: pale bluish.
70mm f/5.7, 31x, Bortle 6, SQM-L 19.6 AB: 2020-04-19: At 22x separated, but relatively tight together with significant difference in brightness. The pair stands close to 2 medium bright stars. Both components appear white. At 31x beautiful sight, the color of the components looks slightly different: white-yellowish with darker ( slightly orange?) companion.

STF 1565 (**)

Name:	STF1565
Type:	**
Constellation:	Leo
Coordinates:	11h39m36.50s / +18°59'48.30"

Components:
	m₁	m₂	ρ	θ	Year
	7m3	8m4	22.2"	304°	2017

Robert Zebahl
B 16x70, Bortle 6-, SQM-L 19.0, Seeing 3/5 2021-03-02: Moderately bright, clear difference in brightness, attractive separation, striking. The primary component shines in a beautiful yellow with a touch of orange, the tiny companion just greyish.

STF 1575 (**)

Name:	STF1575
Type:	**
Constellation:	Vir
Coordinates:	11h51m57.57s / +08°49'48.00"

Components:
	m₁	m₂	ρ	θ	Year
	7m4	7m9	30.5"	211°	2018

Robert Zebahl
B 16x70, Bortle 6-, SQM-L 19.0, Seeing 3/5 2021-03-02: Very nice view! Very striking in the field together with xi Vir, 4 & 6 Vir. Fairly bright with moderate separation. Slightly orange & grey-bluish.

STF 1579 (**)

Name:	STF1579, 65 UMa
Type:	**
Constellation:	UMa
Coordinates:	11h55m05.74s / +46°28'36.60"

Components:
		m₁	m₂	ρ	θ	Year
	AB-C	6m7	8m3	3.8"	40°	2017
	AB-D	6m7	7m0	62.5"	114°	2018

Robert Zebahl
B 8x40 AB-D: 2020-04-05: Immediately conspicuous in the field. Medium bright double star with slightly uneven components. Western component AB appeared slightly orange, component D tended to be bluish.
55mm f/9.1, 83x, Bortle 6-, SQM-L 19.1 2019-02-09: AB, C & D easy to split, but the faint C component only appeared as a tiny star. To the south there is the brighter D component.
55mm f/9.1, 27x, Bortle 6-, SQM-L 19.1 AB-D: Easy to separate with large distance and very small difference in brightness. The D component showed a bluish tint, the lighter one (AB) a slightly yellowish tint. At higher magnification also the faint C component is visible.

STF 1582 (**)

Name:	STF1582
Type:	**
Constellation:	Leo
Coordinates:	11h56m00.86s / +21°58'54.80"

Components:
	m₁	m₂	ρ	θ	Year
	8m1	9m5	12.0"	76°	2015

Robert Zebahl
B 16x70, Bortle 6-, SQM-L 19.0, Seeing 3/5 2021-03-02: Seperated, but very close together with rather large difference in brightness. The companion appears only as a very dim star.

STF 1591 (**)

Name:	STF1591
Type:	**
Constellation:	Vir
Coordinates:	12h01m27.93s / -00°22'43.60"

Components:
		m₁	m₂	ρ	θ	Year
	AB	8m4	8m9	51.3"	351°	2017
	AC	8m4	12m5	23.9"	52°	2017

Robert Zebahl
B 16x70, Bortle 6-, SQM-L 19.0, Seeing 3/5 AB: 2021-03-02: Rather faint double star with well visible brightness difference and moderate separation. Slightly orange & grey-bluish. North in the same field of view is the outstanding double star STTA 116.

STF 1596 (**)

Name:	STF1596, 2 Com
Type:	**
Constellation:	Com
Coordinates:	12h04m16.60s / +21°27'33.00"

Components:
	m₁	m₂	ρ	θ	Year
	6m2	7m5	3.7"	236°	2017