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Last update: 2019-04-21

VdS FG

- Double Stars -

And (13) Cas (12) CVn (2) Her (3) Oph (1) Tau (6)
Aql (4) Cep (9) Cyg (5) Leo (12) Ori (8) Tri (3)
Ari (5) CMa (1) Del (2) LMi (4) Peg (4) UMa (5)
Aur (15) Cnc (3) Dra (1) Lyn (10) Per (3) UMi (1)
Boo (9) Com (1) Eri (1) Lyr (2) Psc (1)
Cam (2) CrB (3) Gem (9) Mon (1) Sex (1)

1 Ari (**)

Name: 1 Ari, STF174
Type: **
Constellation: Ari
Coordinates: 01h50m08.60s / +22°16'29.50"
Components: v6.3 mag / v7.2 mag / 2.9" / 165° / 2016
63mm f/13.3, 46x, Bortle 6-, SQM-L 19.0
Clearly split, but tight with noticeable difference in brightness.

70mm f/5.7, 100x, Bortle 6-
Very nice view. Both Well split, relatively tight with noticeable difference in brightness.

8" f/6, 100x, Bortle 4, NELM 5.9+, SQM-L 21.0
SQM-L 20.8: Nice double star with big difference in brightness.

15 Aql (**)

Name: 15 Aql, SHJ286
Type: **
Constellation: Aql
Coordinates: 19h04m57.67s / -04°01'53.10"
Components: v5.5 mag / v7.0 mag / 39.7" / 210° / 2016
8" f/6, 37x, Bortle 5-, SQM-L 20.4
SQM-L 19.9: Easy to split, evident. Both components appeared slightly orange colored.

30 Cyg (**)

Name: 30 Cyg, STFA50
Type: **
Constellation: Cyg
Coordinates: 20h13m37.90s / +46°44'28.80"
Components: AD / v3.9 mag / v4.8 mag / 336.7" / 322° / 2016
The two components are 30 and 31 Cyg (omicron 1 Cyg).

B 40mm, 8x, Bortle 6-, NELM 5.0
Wonderful double star for binoculars. Large distance of the components, brighter once (31 Cyg) appeared slightly orange, the fainter (Cyg 30) more bluish.

30 Cyg (**)

Name: 30 Cyg, STFA50
Type: **
Constellation: Cyg
Coordinates: 20h13m37.90s / +46°44'28.80"
Components: AC / v3.9 mag / v7.0 mag / 108.6" / 173° / 2016
Brighter component is 31 Cyg (omicron 1 Cyg).

B 40mm, 8x, Bortle 7, NELM 5.0, SQM-L 18.6
Observation at full moon. Easily split with big difference in brightness. Brighter component slightly orange. C-component rather faint.

80mm f/6.25, 25x, Bortle 7, NELM 5.0, SQM-L 18.6
Similar to the observation with binoculars. C-component appeared bluish and gave good contrast to the orange colored 31 Cyg.

41 Lyn (**)

Name: 41 Lyn, S598
Type: **
Constellation: UMa
Coordinates: 09h28m39.99s / +45°36'06.50"
Components: AB / v5.5 mag / v7.8 mag / 69.9" / 161° / 2015
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.

B 40mm, 8x, Bortle 7, NELM 5.0, SQM-L 19.2
Fairly well split with fainter component.

59 And (**)

Name: 59 And, STF222
Type: **
Constellation: And
Coordinates: 02h10m52.83s / +39°02'22.40"
Components: v6.0 mag / v6.7 mag / 16.6" / 37° / 2016
B 40mm, 8x, Bortle 7, SQM-L 19.0
Separated, but very tight. I used a tripod.

120mm f/5, 18x, Bortle 6, SQM-L 19.3
Well split with noticeable difference in brightness.

8" f/6, 100x, Bortle 4, NELM 6.0, SQM-L 20.9
SQM-L 20.4: Nice and evident double star, easy to split. About 12 arcminutes NE there is NGC828 (v12.3m),

70 Oph (**)

Name: 70 Oph, P Oph, STF2272
Type: **
Constellation: Oph
Coordinates: 18h05m27.37s / +02°29'59.30"
Components: AB / v4.2 mag / v6.2 mag / 6.6" / 124° / 2016
8" f/6, 80x, Bortle 5, SQM-L 20.7
SQM-L 20.1: Well split at 80x. Brighter component appeared white, fainter one slightly orange.

100 Her (**)

Name: 100 Her, STF2280
Type: **
Constellation: Her
Coordinates: 18h07m49.56s / +26°06'04.40"
Components: AB / v5.8 mag / v5.8 mag / 14.4" / 183° / 2016
120mm f/5, 40x, Bortle 5+, SQM-L 20.8
SQM-L 20.5: Very nice, evident double star with equally bright components.

152mm f/5.9, 22x, Bortle 3-, SQM-L 21.3
Beautiful view. Easy to separate with components of the same brightness. It is noticeable that there are no brighter stars in the immediate vicinity, so that the double star stands out very well.

164 And (**)

Name: 164 And, STF79
Type: **
Constellation: And
Coordinates: 01h00m03.56s / +44°42'47.70"
Components: v6.0 mag / v6.8 mag / 7.9" / 195° / 2016
55mm f/9.1, 25x, Bortle 7, SQM-L 19.0
Beautiful double star, relatively tight with visible difference in brightness.

beta Cyg (**)

Name: beta Cyg, 6 Cyg, Albireo, STFA43
Type: **
Constellation: Cyg
Coordinates: 19h30m43.29s / +27°57'34.90"
Components: AB / v3.2 mag / v4.7 mag / 34.7" / 54° / 2016
B 40mm, 8x, Bortle 5, NELM 5.5
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!

BU1 (**)

Name: BU1
Type: **
Constellation: Cas
Coordinates: 00h52m49.22s / +56°37'39.50"
Components: AC / v8.6 mag / v8.9 mag / 3.9" / 135° / 2016
70mm f/5.7, 57x, Bortle 7
Easy to split with little difference in brightness.

BU1 (**)

Name: BU1
Type: **
Constellation: Cas
Coordinates: 00h52m49.22s / +56°37'39.50"
Components: AD / v8.6 mag / v9.7 mag / 9.0" / 195° / 2016
70mm f/5.7, 57x, Bortle 7
Relatively large angular distance with obviously fainter component.

BU483 (**)

Name: BU483
Type: **
Constellation: And
Coordinates: 00h09m03.67s / +40°50'34.30"
Components: AC / v7.0 mag / v7.7 mag / 158.2" / 269° / 2012
B 40mm, 8x, Bortle 7, SQM-L 19.0
Large distance with significant difference in brightness.

delta Cep (**)

Name: delta Cep, STFA58
Type: **
Constellation: Cep
Coordinates: 22h29m10.25s / +58°24'54.70"
Components: AC / v4.2 mag / v6.1 mag / 40.9" / 192° / 2016
80mm f/6.25, 25x
Obvious difference in brightness and color. Brighter component slightly orange, weaker bluish. Seems to be little brother of Albireo ;)

ES4 (**)

Name: ES4
Type: **
Constellation: And
Coordinates: 01h31m05.02s / +43°37'14.60"
Components: v8.1 mag / v9.1 mag / 2.8" / 101° / 2016
70mm f/5.7, 128x
Not split. I probably didn't recognised the fainter component. The angular distance shouldn't be a problem.

eta Cas (**)

Name: eta Cas, 24 Cas, STF60
Type: **
Constellation: Cas
Coordinates: 00h49m06.29s / +57°48'54.70"
Components: AB / v3.5 mag / v7.4 mag / 12.9" / 324° / 2016
70mm f/5.7, 57x
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: AB / v4.5 mag / v4.6 mag / 7.4" / 1° / 2016
8" f/6, 80x, Bortle 3-, SQM-L 21.3
Nice, obvious double star. Both components have similar brightness and appeared white.

H5 12 (**)

Name: H5 12, 9 Ari, lambda Ari
Type: **
Constellation: Ari
Coordinates: 01h57m55.71s / +23°35'45.80"
Components: AB / v4.8 mag / v6.7 mag / 37.1" / 48° / 2016
70mm f/5.7, 15x, Bortle 6-
Easy to split with large distance and difference in brightness.

H5 82 (**)

Name: H5 82
Type: **
Constellation: Cas
Coordinates: 00h47m24.62s / +51°05'45.90"
Components: AB / v8.0 mag / v8.3 mag / 56.4" / 75° / 2015
70mm f/5.7, 26x, Bortle 7
Almost equally bright components with large angular distance.

HJ3945 (**)

Name: HJ3945
Type: **
Constellation: CMa
Coordinates: 07h16m36.84s / -23°18'56.10"
Components: AB / v5.0 mag / v5.8 mag / 26.4" / 52° / 2008
120mm f/5, 23x
Evident, easy to split at large angular distance. Brighter component appeared very orange, fainter one bluish.

IC5006 (**)

DSS
Image source: DSS II (red) - 5×5'
Name: IC5006
Type: **
Constellation: Aql
Coordinates: 20h23m47.00s / +06°26'55.00"
Components: v14.5 mag / v15.1 mag / 6.0" / 210.0° / -
8" f/6, 150x, Bortle 4, NELM 5.7+, SQM-L 20.9
NELM 5.4+, SQM-L 20.6: I saw this 'double star' with averted vision just as a faint, stellar brightening.
MODERATE

LEP103 (**)

Name: LEP103
Type: **
Constellation: Cep
Coordinates: 21h54m14.50s / +66°43'54.20"
Components: v7.2 mag / v8.0 mag / 4.1" / 213° / 2000
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?

mu Cyg (**)

Name: mu Cyg, 78 Cyg, STF2822
Type: **
Constellation: Cyg
Coordinates: 21h44m08.57s / +28°44'33.40"
Components: AB / v4.8 mag / v6.2 mag / 1.8" / 321° / 2016
70mm f/5.7, 128x
At 128x I was able to see this double at least elongated.

8" f/6, 171x, Bortle 5, NELM 5.7, SQM-L 20.6
Quite well split with noticeable fainter component.

NGC6933 (**)

DSS
Image source: DSS II (blue) - 5×5'
Name: NGC6933
Type: **
Constellation: Del
Coordinates: 20h33m38.50s / +07°23'25.00"
Components: v10.8 mag / v12.5 mag / 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.

8" f/6, 80x, Bortle 4, NELM 5.7+, SQM-L 20.9
NELM 5.4+, SQM-L 20.6: Easily split, but rather unspectacular. Just for completeness ;-)
EASY

SIN128 (**)

Name: SIN128
Type: **
Constellation: Aur
Coordinates: 06h01m14.73s / +31°32'28.10"
Components: AC / v7.3 mag / v7.6 mag / 2.6" / 193° / 1985
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!?

STF24 (**)

Name: STF24
Type: **
Constellation: And
Coordinates: 00h18m30.59s / +26°08'25.10"
Components: v7.8 mag / v8.4 mag / 5.0" / 247° / 2015
70mm f/5.7, 66x, Bortle 6-
Well split with visible difference in brightness.

STF33 (**)

Name: STF33
Type: **
Constellation: And
Coordinates: 00h30m58.47s / +34°05'53.90"
Components: v8.8 mag / v8.9 mag / 2.8" / 213° / 2016
70mm f/5.7, 128x, Bortle 4-, SQM-L 20.9
Components equally bright, easy to split.

STF55 (**)

Name: STF55
Type: **
Constellation: And
Coordinates: 00h44m22.95s / +33°37'05.60"
Components: v8.3 mag / v8.9 mag / 2.3" / 331° / 2016
70mm f/5.7, 128x, Bortle 7+, SQM-L 18.8
Well split with noticeable difference in brightness.

STF59 (**)

Name: STF59
Type: **
Constellation: Cas
Coordinates: 00h47m59.03s / +51°26'41.20"
Components: AB / v7.2 mag / v8.1 mag / 2.3" / 148° / 2016
70mm f/5.7, 100x, Bortle 7
At 57x elongated, at 100x barely, at 128x clearly split with noticeable difference in brightness.

STF65 (**)

Name: STF65
Type: **
Constellation: Cas
Coordinates: 00h52m45.61s / +68°51'59.30"
Components: v8.0 mag / v8.0 mag / 3.2" / 220° / 2016
70mm f/5.7, 57x, Bortle 7
Clearly split with equally bright components.

STF105 (**)

Name: STF105
Type: **
Constellation: Cas
Coordinates: 01h18m57.50s / +66°09'28.00"
Components: AB / v8.8 mag / v9.8 mag / 3.0" / 185° / 2016
70mm f/5.7, 100x, Bortle 7
Clearly split with visible difference in brightness.

STF108 (**)

Name: STF108
Type: **
Constellation: And
Coordinates: 01h18m47.00s / +37°23'10.60"
Components: v6.5 mag / v9.6 mag / 6.4" / 64° / 2007
120mm f/5, 75x, Bortle 6, SQM-L 19.1
Easily split with big difference in brightness.

STF162 (**)

Name: STF162
Type: **
Constellation: Per
Coordinates: 01h49m15.47s / +47°53'47.10"
Components: AB / v6.5 mag / v7.2 mag / 1.9" / 199° / 2016
70mm f/5.7, 100x
At 100x partly split, otherwise '8'-shaped. At 128x clearly split. Difference in brightness noticeable.

STF163 (**)

Name: STF163
Type: **
Constellation: Cas
Coordinates: 01h51m16.93s / +64°51'17.90"
Components: AB / v6.8 mag / v9.1 mag / 34.5" / 38° / 2016
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.

STF170 (**)

Name: STF170
Type: **
Constellation: Cas
Coordinates: 01h55m27.35s / +76°13'28.40"
Components: v7.5 mag / v8.2 mag / 3.2" / 244° / 2016
70mm f/5.7, 57x, Bortle 7
At 57x barely split with noticeable difference in brightness. At 128x easy split.

STF178 (**)

Name: STF178
Type: **
Constellation: Ari
Coordinates: 01h52m02.54s / +10°48'38.10"
Components: v8.2 mag / v8.2 mag / 3.0" / 206° / 2016
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.

STF182 (**)

Name: STF182
Type: **
Constellation: Cas
Coordinates: 01h56m23.56s / +61°16'52.00"
Components: AB / v8.3 mag / v8.3 mag / 3.6" / 125° / 2016
70mm f/5.7, 57x, Bortle 7
At 44x almost split. At 57x equally bright components visible.

STF205 (**)

Name: STF205, gamma And, 57 And, Alamak
Type: **
Constellation: And
Coordinates: 02h03m53.92s / +42°19'47.50"
Components: A-BC / v2.3 mag / v5.0 mag / 9.4" / 63° / 2016
63mm f/13.3, 42x, Bortle 6-, SQM-L 19.0
Easy to split with quite large difference in brightness.

STF212 (**)

Name: STF212
Type: **
Constellation: Ari
Coordinates: 02h06m14.96s / +25°06'31.00"
Components: v8.3 mag / v8.7 mag / 1.9" / 160° / 2015
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.

STF219 (**)

Name: STF219
Type: **
Constellation: Tri
Coordinates: 02h10m16.10s / +33°21'55.20"
Components: v8.0 mag / v8.9 mag / 11.7" / 186° / 2015
55mm f/9.1, 25x, Bortle 6, NELM 5.0+, SQM-L 19.1
Well separated with noticeable difference in brightness.

STF239 (**)

Name: STF239
Type: **
Constellation: Tri
Coordinates: 02h17m25.29s / +28°44'42.10"
Components: v7.1 mag / v7.8 mag / 13.6" / 211° / 2016
55mm f/9.1, 25x, Bortle 6, NELM 5.0+, SQM-L 19.1
Easy to split, large distance, noticeable difference in brightness.

STF245 (**)

Name: STF245
Type: **
Constellation: And
Coordinates: 02h18m36.27s / +40°16'43.70"
Components: AB / v7.3 mag / v8.0 mag / 11.0" / 294° / 2015
120mm f/5, 50x, Bortle 6, SQM-L 19.3
Both components well seen with noticeable difference in brightness.

STF249 (**)

Name: STF249
Type: **
Constellation: Tri
Coordinates: 02h21m35.66s / +44°35'59.70"
Components: v7.2 mag / v9.0 mag / 2.4" / 195° / 2006
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.

STF331 (**)

Name: STF331
Type: **
Constellation: Per
Coordinates: 03h00m52.18s / +52°21'06.50"
Components: v5.2 mag / v6.2 mag / 12.0" / 86° / 2016
63mm f/13.3, 46x
Easy to separate with relatively large difference in brightness.

STF401 (**)

Name: STF401
Type: **
Constellation: Tau
Coordinates: 03h31m20.76s / +27°34'18.50"
Components: AB / v6.6 mag / v6.9 mag / 11.4" / 269° / 2016
120mm f/5, 18x, Bortle 6-, NELM 4.8+, 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.

STF427 (**)

Name: STF427, V1268 Tau
Type: **
Constellation: Tau
Coordinates: 03h40m38.77s / +28°46'24.00"
Components: v7.4 mag / v7.8 mag / 7.0" / 207° / 2016
120mm f/5, 40x, Bortle 6-, NELM 4.8+, SQM-L 19.1
At 40x barely split. At 75x easily split with visible difference in brightness.

STF470 (**)

Name: STF470, 32 Eri
Type: **
Constellation: Eri
Coordinates: 03h54m17.49s / -02°57'17.00"
Components: AB / v4.8 mag / v5.9 mag / 6.9" / 349° / 2016
55mm f/9.1, 27x, Bortle 6, NELM 5.0+
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.

SKETCH

STF471 (**)

Name: STF471, epsilon Per, 45 Per
Type: **
Constellation: Per
Coordinates: 03h57m51.22s / +40°00'36.90"
Components: AB / v2.9 mag / v8.9 mag / 8.7" / 10° / 2012
63mm f/13.3, 46x
Easy to separate, but much fainter, second component, which appears as a small, faint spot. Nice view.

STF479 (**)

Name: STF479
Type: **
Constellation: Tau
Coordinates: 04h00m56.81s / +23°12'05.40"
Components: AB / v6.9 mag / v7.8 mag / 7.5" / 127° / 2015
8" f/6, 37x, Bortle 4, SQM-L 21.00
Nice, evident double star, easy to split. Slight difference in brightness.

STF616 (**)

Name: STF616, omega Aur, 4 Aur
Type: **
Constellation: Aur
Coordinates: 04h59m15.41s / +37°53'24.90"
Components: AB / v5.0 mag / v8.2 mag / 4.8" / 5° / 2014
70mm f/5.7, 44x
At 44x fainter component seen as fine star close to the primary component. At 57x wonderful view! Overall easy to split.

STF648 (**)

Name: STF648
Type: **
Constellation: Aur
Coordinates: 05h10m59.19s / +32°02'19.50"
Components: AB / v8.1 mag / v8.9 mag / 4.7" / 62° / 2013
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.

STF664 (**)

Name: STF664
Type: **
Constellation: Ori
Coordinates: 05h15m10.54s / +08°25'56.80"
Components: v7.8 mag / v8.4 mag / 4.7" / 177° / 2011
70mm f/5.7, 100x, Bortle 6, SQM-L 19.2
At 44x barely split. At 100x easily split with obvious difference in brightness.

STF666 (**)

Name: STF666
Type: **
Constellation: Aur
Coordinates: 05h17m05.80s / +33°19'47.20"
Components: v7.8 mag / v7.9 mag / 3.0" / 74° / 2017
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!

STF668 (**)

Name: STF668, 19 Ori, beta Ori, Rigel
Type: **
Constellation: Ori
Coordinates: 05h14m32.27s / -08°12'05.90"
Components: A-BC / v0.3 mag / v6.8 mag / 9.5" / 202° / 2014
55mm f/9.1, 83x
The second component was immediately seen as faint companion.

SKETCH

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.

STF669 (**)

Name: STF669
Type: **
Constellation: Aur
Coordinates: 05h18m56.78s / +45°14'51.40"
Components: v8.4 mag / v9.0 mag / 9.9" / 278° / 2013
55mm f/9.1, 25x, Bortle 6, SQM-L 19.4
Well separated with visible difference in brightness.

STF688 (**)

Name: STF688
Type: **
Constellation: Ori
Coordinates: 05h19m20.88s / -10°44'49.90"
Components: v7.5 mag / v7.5 mag / 10.5" / 95° / 2011
70mm f/5.7, 44x, Bortle 6, SQM-L 19.2
Clearly split with decent angular distance. Components appeared nearly equally bright.

STF699 (**)

Name: STF699
Type: **
Constellation: Aur
Coordinates: 05h25m38.50s / +38°02'41.10"
Components: AB / v7.9 mag / v8.6 mag / 8.9" / 345° / 2011
55mm f/9.1, 25x, Bortle 6, SQM-L 19.4
Well separated with slightly fainter companion.

STF700 (**)

Name: STF700, V1804 Ori
Type: **
Constellation: Ori
Coordinates: 05h23m05.54s / +01°03'24.70"
Components: v7.7 mag / v7.9 mag / 4.7" / 4° / 2017
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.

STF716 (**)

Name: STF716, 118 Tau
Type: **
Constellation: Tau
Coordinates: 05h29m16.49s / +25°09'01.10"
Components: AB / v5.8 mag / v6.7 mag / 4.7" / 209° / 2017
70mm f/5.7, 33x
At 33x very tight with visible difference in brightness. At 47x very nice view. Both components appeared white.

STF718 (**)

Name: STF718
Type: **
Constellation: Aur
Coordinates: 05h32m20.59s / +49°23'36.50"
Components: AB / v7.5 mag / v7.5 mag / 7.7" / 73° / 2015
55mm f/9.1, 25x, Bortle 6, SQM-L 19.4
Easy to split with similarly bright components. Nive view.

STF736 (**)

Name: STF736
Type: **
Constellation: Aur
Coordinates: 05h37m07.20s / +41°49'41.70"
Components: v7.5 mag / v8.6 mag / 2.7" / 0° / 2015
70mm f/5.7, 57x
At 57x split with almost no space in between. At 100x clearly split with noticeable fainter component.

STF742 (**)

Name: STF742
Type: **
Constellation: Tau
Coordinates: 05h36m26.38s / +21°59'35.10"
Components: v7.1 mag / v7.5 mag / 4.1" / 274° / 2017
Located about 0.5 degree east of Messier 1.

120mm f/5, 48x, Bortle 6, SQM-L 19.2
Nice, evident double near Messier 1. Easy to split with almost equally bright components.

8" f/6, 80x, Bortle 4-, SQM-L 20.8
Nice double star with nearly equally bright components.

STF764 (**)

Name: STF764
Type: **
Constellation: Aur
Coordinates: 05h41m20.98s / +29°29'14.70"
Components: v6.4 mag / v7.1 mag / 25.6" / 14° / 2017
55mm f/9.1, 25x, Bortle 6, SQM-L 19.4
Easy to split with large distance and noticeable difference in brightness.

STF774 (**)

Name: STF774, zeta Ori, 50 Ori, Alnitak
Type: **
Constellation: Ori
Coordinates: 05h40m45.52s / -01°56'33.30"
Components: AB / v1.9 mag / v3.7 mag / 2.4" / 167° / 2013
70mm f/5.7, 128x, Bortle 6
Big difference in brightness. I could see the fainter component near the first ring of the Airy pattern of the brighter component.

STF796 (**)

Name: STF796
Type: **
Constellation: Aur
Coordinates: 05h49m55.53s / +31°47'08.70"
Components: AB / v7.2 mag / v8.2 mag / 3.7" / 62° / 2012
55mm f/9.1, 83x, Bortle 6, SQM-L 19.4
Well split with noticeable fainter companion.

STF845 (**)

Name: STF845, 41 Aur
Type: **
Constellation: Aur
Coordinates: 06h11m36.59s / +48°42'39.60"
Components: v6.2 mag / v6.9 mag / 7.4" / 357° / 2017
55mm f/9.1, 25x, Bortle 6, SQM-L 19.4
Relatively tight with visible difference in brightness.

STF848 (**)

Name: STF848
Type: **
Constellation: Ori
Coordinates: 06h08m30.36s / +13°58'15.80"
Components: AB / v7.3 mag / v8.2 mag / 2.4" / 111° / 2016
70mm f/5.7, 100x, Bortle 6, SQM-L 19.2
Well split with obvious difference in brightness.

STF872 (**)

Name: STF872
Type: **
Constellation: Aur
Coordinates: 06h15m39.06s / +36°08'55.30"
Components: AB / v6.9 mag / v7.4 mag / 11.3" / 215° / 2017
55mm f/9.1, 25x, Bortle 6, SQM-L 19.4
Well separated with significant difference in brightness.

STF877 (**)

Name: STF877
Type: **
Constellation: Ori
Coordinates: 06h14m42.67s / +14°35'10.80"
Components: v7.5 mag / v8.0 mag / 5.7" / 263° / 2003
70mm f/5.7, 44x, Bortle 6, SQM-L 19.2
Well split, but close together. Little difference in brightness noticeable.

STF899 (**)

Name: STF899
Type: **
Constellation: Gem
Coordinates: 06h22m49.64s / +17°34'27.30"
Components: v7.4 mag / v8.0 mag / 2.2" / 18° / 2017
70mm f/5.7, 133x
Separated, but tight with visible difference in brightness.

STF900 (**)

Name: STF900, epsilon Mon, 8 Mon
Type: **
Constellation: Mon
Coordinates: 06h23m46.10s / +04°35'34.20"
Components: AB / v4.4 mag / v6.6 mag / 12.0" / 29° / 2017
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.

STF918 (**)

Name: STF918
Type: **
Constellation: Aur
Coordinates: 06h33m57.62s / +52°27'41.80"
Components: AB / v7.3 mag / v8.2 mag / 4.8" / 336° / 2014
55mm f/9.1, 40x, Bortle 6, SQM-L 19.4
At 40x tight, at 55x well split with obviously fainter companion.

STF932 (**)

Name: STF932
Type: **
Constellation: Gem
Coordinates: 06h34m21.57s / +14°45'08.30"
Components: v8.3 mag / v8.5 mag / 1.7" / 305° / 2012
70mm f/5.7, 150x
Unfortunately a nearby lamp bothered me. I could see the double star at least elongated.

STF948 (**)

Name: STF948, 12 Lyn
Type: **
Constellation: Lyn
Coordinates: 06h46m14.15s / +59°26'30.10"
Components: AB / v5.4 mag / v6.0 mag / 2.0" / 65° / 2017
55mm f/9.1, 167x
Components A and B separated, whereby the Airy disks slightly overlap. The difference in brightness was well visible.

SKETCH

63mm f/13.3, 140x
Components A and B split with almost no space in between. The difference in brightness was visible.

SKETCH

70mm f/5.7, 133x
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.

SKETCH

STF948 (**)

Name: STF948, 12 Lyn
Type: **
Constellation: Lyn
Coordinates: 06h46m14.15s / +59°26'30.10"
Components: AC / v5.4 mag / v7.0 mag / 9.3" / 307° / 2016
55mm f/9.1, 27x
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.

70mm f/5.7, 22x
Well split, relatively close together with significant difference in brightness.

STF958 (**)

Name: STF958
Type: **
Constellation: Lyn
Coordinates: 06h48m12.29s / +55°42'15.10"
Components: AB / v6.3 mag / v6.3 mag / 4.5" / 75° / 2017
70mm f/5.7, 33x
Clearly split, equally bright, close together. Nice view.

STF982 (**)

Name: STF982, 38 Gem
Type: **
Constellation: Gem
Coordinates: 06h54m38.63s / +13°10'40.10"
Components: AB / v4.8 mag / v7.8 mag / 7.3" / 143° / 2017
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.

STF994 (**)

Name: STF994
Type: **
Constellation: Aur
Coordinates: 06h59m27.19s / +37°05'53.50"
Components: AB / v7.9 mag / v8.1 mag / 26.8" / 55° / 2009
55mm f/9.1, 25x, Bortle 6, SQM-L 19.4
Well separated, large distance, slight difference in brightness.

STF1009 (**)

Name: STF1009
Type: **
Constellation: Lyn
Coordinates: 07h05m39.83s / +52°45'31.30"
Components: AB / v6.9 mag / v7.0 mag / 4.4" / 147° / 2017
70mm f/5.7, 33x
Very nice view. Equally bright components, tight.

STF1050 (**)

Name: STF1050
Type: **
Constellation: Lyn
Coordinates: 07h19m51.29s / +54°55'18.40"
Components: AB / v8.1 mag / v8.8 mag / 19.6" / 21° / 2013
70mm f/5.7, 22x
Rather faint, obviously split with visible difference in brightness. View similar to STF 1062.

STF1062 (**)

Name: STF1062, 19 Lyn
Type: **
Constellation: Lyn
Coordinates: 07h22m52.06s / +55°16'53.30"
Components: AB / v5.8 mag / v6.7 mag / 15.0" / 316° / 2014
70mm f/5.7, 22x
Clearly separated, moderate distance, noticeable difference in brightness. The colors seemed different, but not exactly definable.

STF1065 (**)

Name: STF1065, 20 Lyn
Type: **
Constellation: Lyn
Coordinates: 07h22m15.11s / +50°08'55.70"
Components: v7.5 mag / v7.7 mag / 14.7" / 255° / 2010
70mm f/5.7, 22x
Nicely split, moderate distance, similarly bright.

STF1066 (**)

Name: STF1066, delta Gem, 55 Gem
Type: **
Constellation: Gem
Coordinates: 07h20m07.39s / +21°58'56.40"
Components: v3.5 mag / v8.2 mag / 5.5" / 230° / 2016
55mm f/9.1, 71x
Large difference in brightness. The fainter component was well separated, but just a very tiny star.

STF1083 (**)

Name: STF1083
Type: **
Constellation: Gem
Coordinates: 07h25m35.30s / +20°29'42.60"
Components: v7.3 mag / v8.1 mag / 6.8" / 46° / 2014
70mm f/5.7, 22x
Unequal pair. At 22x very tight, at 44x well split. Fainter companion appeared slightly orange, brighter one white-bluish.

STF1094 (**)

Name: STF1094
Type: **
Constellation: Gem
Coordinates: 07h27m25.99s / +15°18'59.00"
Components: v7.6 mag / v8.5 mag / 2.7" / 100° / 2014
70mm f/5.7, 57x
At 57x barely split with noticeable difference in brightness. At 100x well split, but still tight.

STF1110 (**)

Name: STF1110, alpha Gem, 66 Gem, Castor
Type: **
Constellation: Gem
Coordinates: 07h34m35.86s / +31°53'17.80"
Components: AB / v1.9 mag / v3.0 mag / 5.2" / 54° / 2017
70mm f/5.7, 44x, Bortle 6
At 44x the double star appeared as an '8'. At 100x clearly split with noticeable difference in brightness. Both components appeared white.

STF1140 (**)

Name: STF1140
Type: **
Constellation: Gem
Coordinates: 07h48m22.61s / +18°20'12.40"
Components: v7.0 mag / v8.7 mag / 6.2" / 275° / 2013
70mm f/5.7, 44x
Easy to separate with quite clear difference in brightness.

STF1196 (**)

Name: STF1196, zeta Cnc, 16 Cnc
Type: **
Constellation: Cnc
Coordinates: 08h12m12.79s / +17°38'51.20"
Components: AB-C / v4.9 mag / v5.8 mag / 6.0" / 64° / 2016
102mm f/11, 86x, Bortle 6-, SQM-L 19.2
Easy to separate. A: light gray, B: pale orange.

120mm f/5, 67x, Bortle 6, SQM-L 19.3
Evident difference in brightness, easy to split. Both components of similar color.

STF1196 (**)

Name: STF1196, zeta Cnc, 16 Cnc
Type: **
Constellation: Cnc
Coordinates: 08h12m12.79s / +17°38'51.20"
Components: AB / v5.3 mag / v6.2 mag / 1.1" / 18° / 2016
120mm f/5, 200x, Bortle 6, SQM-L 19.3
Very tight. The Airy disks were still touching. Slight difference in brightness. Extremely beautiful triple star!

SKETCH

STF1268 (**)

Name: STF1268, iota Cnc, 48 Cnc
Type: **
Constellation: Cnc
Coordinates: 08h46m41.82s / +28°45'35.60"
Components: v4.1 mag / v6.0 mag / 31.3" / 308° / 2016
102mm f/11, 28x
Grand sight! Pretty wide apart and unequal. A: decent orange, B: very nice light blue.

STF1275 (**)

Name: STF1275
Type: **
Constellation: UMa
Coordinates: 08h51m26.19s / +57°31'38.10"
Components: AB / v8.7 mag / v8.9 mag / 1.9" / 198° / 2015
70mm f/5.7, 100x
At 100x and 150x not permanently split. Components very close together.

STF1333 (**)

Name: STF1333
Type: **
Constellation: Lyn
Coordinates: 09h18m25.97s / +35°21'51.30"
Components: v6.6 mag / v6.7 mag / 1.9" / 50° / 2017
63mm f/13.3, 120x
At 93x seen as '8', at 120x split, but pretty tight with no visible difference in brightness.

STF1334 (**)

Name: STF1334, 38 Lyn
Type: **
Constellation: Lyn
Coordinates: 09h18m50.64s / +36°48'09.30"
Components: AB / v3.9 mag / v6.1 mag / 2.6" / 224° / 2017
63mm f/13.3, 140x
Fainter companion only seen as permanent brightening on the first diffraction ring.

SKETCH

STF1344 (**)

Name: STF1344
Type: **
Constellation: LMi
Coordinates: 09h23m28.35s / +39°08'05.10"
Components: v9.0 mag / v9.5 mag / 3.7" / 103° / 2014
120mm f/5, 75x, Bortle 7+, NELM 5.0, SQM-L 18.8
At 50x and 75x split, but tight with little difference in brightness.

STF1374 (**)

Name: STF1374
Type: **
Constellation: LMi
Coordinates: 09h41m21.88s / +38°57'01.90"
Components: AB / v7.3 mag / v8.7 mag / 2.8" / 310° / 2015
120mm f/5, 168x, Bortle 7+, NELM 5.0, SQM-L 18.8
At 50x elongated, at 75x seen as '8'. At 168x clearly split with obviously fainter component.

STF1399 (**)

Name: STF1399
Type: **
Constellation: Leo
Coordinates: 09h57m02.21s / +19°45'44.60"
Components: v7.7 mag / v8.4 mag / 30.6" / 175° / 2016
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).

STF1424 (**)

Name: STF1424, gamma Leo, Algieba
Type: **
Constellation: Leo
Coordinates: 10h19m58.35s / +19°50'29.40"
Components: AB / v2.4 mag / v3.6 mag / 4.7" / 127° / 2017
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.

SKETCH

55mm f/9.1, 59x, Bortle 6, SQM-L 19.5
Very nice unequal double. A appeared yellow-orange, B rather white-bluish.

SKETCH

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.

STF1426 (**)

Name: STF1426
Type: **
Constellation: Leo
Coordinates: 10h20m32.32s / +06°25'47.60"
Components: AB-C / v7.3 mag / v9.4 mag / 7.7" / 11° / 2016
102mm f/11, 160x, Bortle 6-
Quite large angular distance and therefor easy to separate. The C component was pretty faint.

STF1426 (**)

Name: STF1426
Type: **
Constellation: Leo
Coordinates: 10h20m32.32s / +06°25'47.60"
Components: AB / v8.0 mag / v8.3 mag / 0.9" / 314° / 2015
102mm f/11, 160x, Bortle 6-
At first glance elongated, on closer look visible as '8'.

STF1431 (**)

Name: STF1431
Type: **
Constellation: Leo
Coordinates: 10h25m35.12s / +08°46'35.40"
Components: v7.8 mag / v9.1 mag / 3.6" / 76° / 2015
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.

STF1443 (**)

Name: STF1443
Type: **
Constellation: LMi
Coordinates: 10h33m17.07s / +37°40'25.00"
Components: v9.9 mag / v10.0 mag / 5.1" / 160° / 2010
120mm f/5, 50x, Bortle 7+, NELM 5.0, SQM-L 18.8
At 50x split with little distance. At 75x clearly split with small difference in brightness.

STF1450 (**)

Name: STF1450, 49 Leo
Type: **
Constellation: Leo
Coordinates: 10h35m02.16s / +08°39'01.60"
Components: v5.8 mag / v7.9 mag / 2.1" / 158° / 2015
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.

STF1459 (**)

Name: STF1459
Type: **
Constellation: LMi
Coordinates: 10h40m12.46s / +38°24'11.40"
Components: v8.3 mag / v8.8 mag / 5.3" / 152° / 2014
120mm f/5, 50x, Bortle 7+, NELM 5.0, SQM-L 18.8
Clearly split with noticeable difference in brightness.

STF1466 (**)

Name: STF1466, 35 Sex
Type: **
Constellation: Sex
Coordinates: 10h43m20.91s / +04°44'51.60"
Components: AB / v6.2 mag / v7.1 mag / 6.7" / 239° / 2017
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 gray-blue.

SKETCH

STF1487 (**)

Name: STF1487, 54 Leo
Type: **
Constellation: Leo
Coordinates: 10h55m36.80s / +24°44'59.00"
Components: v4.5 mag / v6.3 mag / 6.4" / 112° / 2017
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.

STF1523 (**)

Name: STF1523, xi UMa, 53 UMa, Alula Australis
Type: **
Constellation: UMa
Coordinates: 11h18m10.90s / +31°31'45.00"
Components: AB / v4.3 mag / v4.8 mag / 1.9" / 164° / 2017
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.

SKETCH

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.

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 5.0+
2019-02-06: Well split with visible difference in brightness. The colors of both components appeared equal.

STF1540 (**)

Name: STF1540, 83 Leo
Type: **
Constellation: Leo
Coordinates: 11h26m45.32s / +03°00'47.20"
Components: AB / v6.5 mag / v7.5 mag / 28.2" / 149° / 2016
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 gray-bluish.

SKETCH

STF1547 (**)

Name: STF1547, 88 Leo
Type: **
Constellation: Leo
Coordinates: 11h31m44.94s / +14°21'52.20"
Components: AB / v6.3 mag / v9.1 mag / 15.7" / 332° / 2015
55mm f/9.1, 42x, Bortle 6, SQM-L 19.5
Well split with moderate distance. Primary component appeared white-yellowish. Pretty unequal pair.

STF1552 (**)

Name: STF1552, 90 Leo
Type: **
Constellation: Leo
Coordinates: 11h34m42.50s / +16°47'48.90"
Components: AB / v6.3 mag / v7.3 mag / 3.5" / 208° / 2017
55mm f/9.1, 42x, Bortle 6, SQM-L 19.5
A and B very tight and unequal. Much fainter component C very wide apart. All components almost in line. Very nice view.

SKETCH

STF1579 (**)

Name: STF1579, 65 UMa
Type: **
Constellation: UMa
Coordinates: 11h55m05.74s / +46°28'36.60"
Components: AB-C / v6.7 mag / v8.3 mag / 3.9" / 42° / 2014
55mm f/9.1, 83x, Bortle 6-, SQM-L 19.1
Easy to split, but the faint C component only appeared as a tiny star.

SKETCH

STF1579 (**)

Name: STF1579, 65 UMa
Type: **
Constellation: UMa
Coordinates: 11h55m05.74s / +46°28'36.60"
Components: AB-D / v6.7 mag / v7.0 mag / 62.6" / 114° / 2016
55mm f/9.1, 27x, Bortle 6-, SQM-L 19.1
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.

SKETCH

STF1626 (**)

Name: STF1626
Type: **
Constellation: Dra
Coordinates: 12h16m47.11s / +70°08'45.70"
Components: v9.4 mag / v9.6 mag / 2.2" / 5° / 2005
120mm f/5, 150x, Bortle 6, NELM 5.0+, SQM-L 19.3
Components similar in brightness, pretty faint, close together, but clearly split.

STF1657 (**)

Name: STF1657, 24 Com
Type: **
Constellation: Com
Coordinates: 12h35m07.76s / +18°22'37.40"
Components: v5.1 mag / v6.3 mag / 20.4" / 272° / 2016
102mm f/11, 28x
Very beautiful view with moderate distance and difference in brightness. A: glossy, light orange, B: white- bluish.

8" f/6, 60x, Bortle 4, NELM 6.0, SQM-L 21.0
Well split with obvious difference in brightness. Fainter component appeared bluish, the brighter one slightly orange.

STF1692 (**)

Name: STF1692, 12 CVn, alpha CVn, Cor Caroli
Type: **
Constellation: CVn
Coordinates: 12h56m01.67s / +38°19'06.20"
Components: AB / v2.9 mag / v5.5 mag / 20.0" / 229° / 2016
70mm f/5.7, 22x
Beautiful view. Clearly unequal with nice angular distance. Primary component appeared in pale yellow, secondary component silvery-white.

4.5" f/8, 28x, Bortle 6, NELM 5.3, SQM-L 19.7
Well split with big difference in brightness.

STF1694 (**)

Name: STF1694
Type: **
Constellation: Cam
Coordinates: 12h49m13.80s / +83°24'46.30"
Components: AB / v5.3 mag / v5.7 mag / 21.3" / 324° / 2015
70mm f/5.7, 15x, Bortle 6-, NELM 5.0, SQM-L 19.1
Easy to split with noticeable angular distance and slight difference in brightness. The faint component tends to be more bluish, the brighter one appeared more light yellowish.

STF1834 (**)

Name: STF1834
Type: **
Constellation: Boo
Coordinates: 14h20m17.60s / +48°30'25.10"
Components: v8.1 mag / v8.3 mag / 1.7" / 105° / 2016
120mm f/5, 150x, Bortle 6, NELM 5.0+, SQM-L 19.4
At 108x elongated, at 150x barely split with similarly bright components.

STF1835 (**)

Name: STF1835
Type: **
Constellation: Boo
Coordinates: 14h23m22.74s / +08°26'47.90"
Components: A-BC / v5.0 mag / v6.8 mag / 6.0" / 195° / 2016
102mm f/11, 62x
At 28x barely split with visible difference in brightness. At 62x easy to separate. The colors seemed similar.

STF1877 (**)

Name: STF1877, epsilon Boo, Izar
Type: **
Constellation: Boo
Coordinates: 14h44m59.14s / +27°04'29.90"
Components: AB / v2.6 mag / v4.8 mag / 2.9" / 343° / 2015
55mm f/9.1, 125x
The fainter component was seen as permanent brightening on the first diffraction ring of the primary component.

60mm f/10, 192x, Bortle 6-, SQM-L 19.1
Easy to split, whereby the much fainter component lies on the first diffraction ring of the primary component. The primary component itself appeared slightly yellowish.

SKETCH

70mm f/5.7, 133x, Bortle 6, SQM-L 19.2
Easy to split, very unequal. A appeared in pale orange, B was visible as a very tiny, gray star on the first diffraction ring of component A.

120mm f/5, 192x, Bortle 4, SQM-L 21.3
At 85x the fainter component was easily visible but not separated. At 192x well split. The fainter component was almost on the first diffraction ring of the primary component. Quite big difference in brightness. I did not looked at the color of the components.

STF1884 (**)

Name: STF1884
Type: **
Constellation: Boo
Coordinates: 14h48m23.37s / +24°22'01.00"
Components: v6.6 mag / v7.5 mag / 2.2" / 57° / 2016
102mm f/11, 86x
At 86x pretty tight and unequal. At 160x clearly split. A: white, B: slightly orange.

STF1886 (**)

Name: STF1886
Type: **
Constellation: Boo
Coordinates: 14h51m02.31s / +09°43'25.20"
Components: AB / v7.6 mag / v9.7 mag / 7.4" / 225° / 2012
102mm f/11, 28x
At 28x, the B-component appeared rather faint and pretty close to the primary component. At 62x both components were clearly visible and unequal. A: slightly orange, B: grayish.

STF1890 (**)

Name: STF1890, 39 Boo
Type: **
Constellation: Boo
Coordinates: 14h49m41.37s / +48°43'15.60"
Components: v6.3 mag / v6.7 mag / 2.7" / 47° / 2016
70mm f/5.7, 67x, Bortle 6, SQM-L 19.2
At 44x elongated, partly with constriction. At 67x split, but very tight. A difference in brightness was not seen. At 133x clearly separated with little difference in brightness. A appeared pale yellow, B rather warm-white.

STF1938 (**)

Name: STF1938, mu 2 Boo
Type: **
Constellation: Boo
Coordinates: 15h24m30.89s / +37°20'52.50"
Components: Ba-Bb / v7.1 mag / v7.6 mag / 2.3" / 4° / 2016
102mm f/11, 125x, Bortle 6-, SQM-L 19.2
Beautiful view! This triple system includes STFA 28 and STF 1938.

SKETCH

STF1964 (**)

Name: STF1964
Type: **
Constellation: CrB
Coordinates: 15h38m12.91s / +36°14'48.60"
Components: AC / v8.1 mag / v8.1 mag / 15.1" / 87° / 2016
102mm f/11, 62x
Rather wide pair, equal without visible difference in color.

120mm f/5, 23x, Bortle 6, NELM 5.0+, SQM-L 19.4
Nice double star, well split with equally bright components.

STF1965 (**)

Name: STF1965, zeta 2 CrB
Type: **
Constellation: CrB
Coordinates: 15h39m22.68s / +36°38'09.00"
Components: v5.0 mag / v5.9 mag / 6.2" / 307° / 2016
102mm f/11, 28x
At 28x very tight and barely split, unequal. At 86x very nice view. No difference in color: both components appeared white.

120mm f/5, 48x, Bortle 6, NELM 5.0+, SQM-L 19.4
Very nice double star, well split with noticeable difference in brightness.

STF1973 (**)

Name: STF1973
Type: **
Constellation: CrB
Coordinates: 15h46m24.50s / +36°26'45.60"
Components: v7.6 mag / v8.8 mag / 30.8" / 320° / 2015
120mm f/5, 23x, Bortle 6, NELM 5.0+, SQM-L 19.4
Nice double star, easy to split with noticeable difference in brightness.

STF2016 (**)

Name: STF2016
Type: **
Constellation: Her
Coordinates: 16h12m07.05s / +11°54'39.20"
Components: v8.5 mag / v9.6 mag / 7.4" / 148° / 2015
Only 11 arcminutes northwestward is the pretty bright planetary nebula IC4593.

120mm f/5, 40x, Bortle 4, SQM-L 21.0
SQM-L 20.6: Split at 40x with obvious difference in brightness. At 75x easily split.

STF2034 (**)

Name: STF2034
Type: **
Constellation: UMi
Coordinates: 15h48m43.02s / +83°37'10.50"
Components: v7.7 mag / v8.0 mag / 1.1" / 108° / 2012
102mm f/11, 187x, Bortle 6-, SQM-L 18.8
At 187x clearly elongated, partly visible as '8' with slight difference in brightness. At 280x two distinct, slightly overlapping Airy disks visible.

STF2140 (**)

Name: STF2140, alpha Her
Type: **
Constellation: Her
Coordinates: 17h14m38.86s / +14°23'24.90"
Components: AB / v3.5 mag / v5.4 mag / 4.8" / 104° / 2016
55mm f/9.1, 41x
Well split with noticeable difference in brightness.

STF2382 (**)

Name: STF2382, 4 Lyr, epsilon 1 Lyr
Type: **
Constellation: Lyr
Coordinates: 18h44m20.34s / +39°40'12.40"
Components: AB / v5.2 mag / v6.1 mag / 2.3" / 346° / 2016
55mm f/9.1, 90x
At 90x seen as '8', at 125x clearly split.

STF2383 (**)

Name: STF2383, 5 Lyr, epsilon 2 Lyr
Type: **
Constellation: Lyr
Coordinates: 18h44m22.78s / +39°36'45.80"
Components: CD / v5.2 mag / v5.4 mag / 2.4" / 76° / 2016
55mm f/9.1, 90x
At 90x barely, at 125x clearly split.

STF2434 (**)

Name: STF2434
Type: **
Constellation: Aql
Coordinates: 19h02m44.38s / -00°42'40.40"
Components: A-BC / v8.4 mag / v8.9 mag / 27.7" / 89° / 2016
120mm f/5, 18x, Bortle 4, SQM-L 21.1
Easily split with similar brightness.

STF2583 (**)

Name: STF2583, pi Aql
Type: **
Constellation: Aql
Coordinates: 19h48m42.05s / +11°48'57.30"
Components: AB / v6.3 mag / v6.8 mag / 1.5" / 106° / 2016
120mm f/5, 337x, Bortle 4-, SQM-L 20.7
At 100x elongated, at 200x seen as '8'. At 337x split in moments of good seeing, but still very tight. Overall the seeing was not so good.

STF2690 (**)

Name: STF2690
Type: **
Constellation: Del
Coordinates: 20h31m11.94s / +11°15'33.70"
Components: A-BC / v7.1 mag / v7.4 mag / 17.6" / 255° / 2013
8" f/6, 37x, Bortle 4, NELM 5.7+, SQM-L 20.9
NELM 5.4+, SQM-L 20.6: Evident double star with almost equally bright components and no noticeable contrast in color.

STF2767 (**)

Name: STF2767
Type: **
Constellation: Peg
Coordinates: 21h10m30.43s / +19°57'35.70"
Components: v8.2 mag / v8.5 mag / 2.5" / 29° / 2016
70mm f/5.7, 100x
Clearly split with slight difference in brightness.

STF2799 (**)

Name: STF2799
Type: **
Constellation: Peg
Coordinates: 21h28m52.79s / +11°05'05.20"
Components: AB / v7.4 mag / v7.4 mag / 1.9" / 259° / 2016
70mm f/5.7, 100x
At 100x, barely, at 128x clearly split with equally bright components.

STF2807 (**)

Name: STF2807
Type: **
Constellation: Cep
Coordinates: 21h17m33.47s / +82°31'03.70"
Components: v8.7 mag / v8.8 mag / 1.8" / 311° / 2016
70mm f/5.7, 128x, Bortle 5, NELM 5.7, SQM-L 20.6
Barely split without any noticeable difference in brightness.

STF2840 (**)

Name: STF2840
Type: **
Constellation: Cep
Coordinates: 21h52m01.02s / +55°47'48.30"
Components: AB / v5.6 mag / v6.4 mag / 17.9" / 196° / 2016
55mm f/9.1, 25x
Striking double star with clear distance and difference in brightness.

STF2845 (**)

Name: STF2845
Type: **
Constellation: Cep
Coordinates: 21h52m20.95s / +63°06'04.50"
Components: AB / v8.1 mag / v8.2 mag / 2.0" / 173° / 2016
70mm f/5.7, 128x, Bortle 4-, SQM-L 20.9
Easy to split with equally bright components.

STF2873 (**)

Name: STF2873
Type: **
Constellation: Cep
Coordinates: 21h58m13.53s / +82°52'10.80"
Components: AB / v7.0 mag / v7.5 mag / 13.4" / 66° / 2016
55mm f/9.1, 25x
Easy to split with visible difference in brightness. Stands out immediately.

STF2903 (**)

Name: STF2903
Type: **
Constellation: Cep
Coordinates: 22h21m45.20s / +66°42'22.60"
Components: v7.1 mag / v7.8 mag / 4.1" / 97° / 2017
55mm f/9.1, 55x
At 55x split with noticeable difference in brightness. At 83x very well split with significantly fainter component.

STF2947 (**)

Name: STF2947
Type: **
Constellation: Cep
Coordinates: 22h49m00.68s / +68°34'12.20"
Components: AB / v6.9 mag / v7.0 mag / 4.7" / 55° / 2017
55mm f/9.1, 40x
At 25x elongated, at 40x split, but tight. At 55x well split, almost equally bright.

STF2971 (**)

Name: STF2971
Type: **
Constellation: Cep
Coordinates: 22h56m41.48s / +78°29'45.00"
Components: v8.0 mag / v8.9 mag / 5.5" / 4° / 2016
55mm f/9.1, 40x
At 25x split to some extend. At 40x well split with noticeable difference in brightness.

STF2974 (**)

Name: STF2974
Type: **
Constellation: Peg
Coordinates: 23h05m01.12s / +33°23'08.00"
Components: v8.1 mag / v8.5 mag / 2.7" / 166° / 2016
70mm f/5.7, 100x
Clearly split with slight difference in brightness.

STF2990 (**)

Name: STF2990
Type: **
Constellation: Peg
Coordinates: 23h13m17.60s / +22°05'00.70"
Components: AB / v8.9 mag / v9.0 mag / 2.6" / 56° / 2016
70mm f/5.7, 100x
Rather faint, because I observed from the sidewalk with present moon. Well split with equally bright components.

STF3042 (**)

Name: STF3042
Type: **
Constellation: And
Coordinates: 23h51m52.40s / +37°53'28.40"
Components: v7.6 mag / v7.8 mag / 5.8" / 86° / 2017
55mm f/9.1, 25x, Bortle 7, SQM-L 19.0
Split, tight, nearly equally bright.

STF3050 (**)

Name: STF3050
Type: **
Constellation: And
Coordinates: 23h59m29.33s / +33°43'26.90"
Components: AB / v6.5 mag / v6.7 mag / 2.5" / 341° / 2017
55mm f/9.1, 83x, Bortle 6, NELM 5.0+, SQM-L 19.1
At 83x seen as '8'. From 100x to 166x seen as '8', temporarily visible with space between.

70mm f/5.7, 100x
Wonderful double star. Easy to split with slight difference in brightness.

STF3053 (**)

Name: STF3053
Type: **
Constellation: Cas
Coordinates: 00h02m36.08s / +66°05'56.30"
Components: AB / v6.0 mag / v7.2 mag / 15.3" / 71° / 2016
63mm f/13.3, 46x
Easy to split with noticeable difference in brightness. Brighter component appeared slightly orange, fainter one bluish.

STFA1 (**)

Name: STFA1
Type: **
Constellation: And
Coordinates: 00h46m24.34s / +30°56'33.50"
Components: AB / v7.2 mag / v7.4 mag / 47.6" / 47° / 2016
B 40mm, 8x, Bortle 7, SQM-L 19.0
Large distance with visible difference in brightness. I used a tripod.

STFA7 (**)

Name: STFA7
Type: **
Constellation: Tau
Coordinates: 03h31m03.47s / +27°43'53.60"
Components: AB / v7.4 mag / v7.8 mag / 44.0" / 234° / 2015
120mm f/5, 18x, Bortle 6-, NELM 4.8+, SQM-L 19.1
Well split with noticeable difference in brightness. Nice view together with the double star STF401 located southeast.

STFA19 (**)

Name: STFA19, 84 Leo, tau Leo
Type: **
Constellation: Leo
Coordinates: 11h27m56.23s / +02°51'22.50"
Components: AB / v5.0 mag / v7.5 mag / 88.4" / 182° / 2016
55mm f/9.1, 16x, Bortle 6, SQM-L 19.5
Wonderful double with slight color contrast in a very nice field. Together with 83 Leo stunning view. Noticeable unequal. A appeared white-yellowish with a hint of orange, B gray-bluish.

SKETCH

STFA24 (**)

Name: STFA24
Type: **
Constellation: CVn
Coordinates: 13h10m03.27s / +38°29'55.90"
Components: AB / v6.0 mag / v6.3 mag / 275.6" / 296° / 2012
This double star contains of the components 15 and 17 CVn.

B 40mm, 8x, Bortle 7, NELM 5.0, SQM-L 19.2
Both components similar in brightness with large distance.

STFA28 (**)

Name: STFA28, mu 1 Boo, 51 Boo
Type: **
Constellation: Boo
Coordinates: 15h24m29.54s / +37°22'37.10"
Components: AB / v4.3 mag / v7.1 mag / 109.0" / 171° / 2016
B 40mm, 8x, Bortle 7, NELM 5.0, SQM-L 19.2
Easily split with obvious difference in brightness.

70mm f/5.7, 22x, Bortle 6, SQM-L 19.2
Evident, very wide apart and unequal. A: white-yellowish, B: gray.

120mm f/5, 23x, Bortle 6, NELM 5.0+, SQM-L 19.4
Easy to split with large angular distance and noticeable difference in brightness.

STT174 (**)

Name: STT174
Type: **
Constellation: Lyn
Coordinates: 07h35m56.00s / +43°01'51.40"
Components: v6.6 mag / v8.3 mag / 2.2" / 88° / 2012
70mm f/5.7, 133x
The obviously fainter component could be permanently seen in the right position angle as brightening on the first diffraction ring.

STT179 (**)

Name: STT179, kappa Gem, 77 Gem
Type: **
Constellation: Gem
Coordinates: 07h44m26.87s / +24°23'53.30"
Components: v3.7 mag / v10.0 mag / 7.2" / 241° / 2014
70mm f/5.7, 133x
Observation at nearly full moon: Fainter companion was not visible.

120mm f/5, 200x, Bortle 6-, SQM-L 18.9
Although the optics were not yet completely cooled down, the fainter component could be seen slightly outside the first diffraction ring as a tiny star in moments of steady air.

STT215 (**)

Name: STT215
Type: **
Constellation: Leo
Coordinates: 10h16m16.05s / +17°44'24.60"
Components: v7.2 mag / v7.5 mag / 1.5" / 178° / 2017
70mm f/5.7, 133x
Appeared partly separated, partly as '8'. Brightness seemed to be equal.

STT298 (**)

Name: STT298
Type: **
Constellation: Boo
Coordinates: 15h36m02.22s / +39°48'08.90"
Components: AB-C / v6.9 mag / v7.8 mag / 121.6" / 328° / 2013
102mm f/11, 28x
Wide, moderately unequal pair. Little difference in color: Primary components appeared a bit more orange colored.

120mm f/5, 23x, Bortle 6, NELM 5.0+, SQM-L 19.4
Easy to split with large angular distance and noticeable difference in brightness.

STT413 (**)

Name: STT413, 54 Cyg, lambda Cyg
Type: **
Constellation: Cyg
Coordinates: 20h47m24.53s / +36°29'26.70"
Components: AB / v4.7 mag / v6.3 mag / 1.1" / 4° / 2016
152mm f/5.9, 300x, Bortle 6, SQM-L 19.3
The fainter component was visible as a permanent brightening of the first diffraction ring.

STT545 (**)

Name: STT545, 37 Aur, theta Aur
Type: **
Constellation: Aur
Coordinates: 05h59m43.24s / +37°12'45.90"
Components: AB / v2.6 mag / v7.2 mag / 4.0" / 304° / 2014
70mm f/5.7, 57x
At 57x nothing seen at first sight. At 133x the much fainter component was visible after a short time as a tiny star in the correct position angle. With this knowledge, the observation at 57x was also successful, even if one has to look very closely. The challenge here is not so much the angular distance as the large difference in brightness.

SZ Cam (**)

Name: SZ Cam, STF485
Type: **
Constellation: Cam
Coordinates: 04h07m51.38s / +62°19'48.40"
Components: AE / v6.9 mag / v6.9 mag / 18.0" / 306° / 2016
B 40mm, 8x, Bortle 6, NELM 5.0+
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.

WNC2 (**)

Name: WNC2
Type: **
Constellation: Ori
Coordinates: 05h23m51.32s / -00°51'59.80"
Components: A-BC / v6.9 mag / v7.0 mag / 3.0" / 160° / 2015
70mm f/5.7, 44x, Bortle 6, SQM-L 19.2
Double star appeared elongated.

120mm f/5, 150x, Bortle 6, SQM-L 19.2
Clearly split with nearly equally bright components.

WZ Cas (**)

Name: WZ Cas, STTA254
Type: **
Constellation: Cas
Coordinates: 00h01m15.85s / +60°21'19.00"
Components: AB / v7.4 mag / v8.3 mag / 57.7" / 89° / 2010
80mm f/6.25, 33x, Bortle 8, NELM 4.3+, SQM-L 18.9
Nice double star. Brighter component appeared orange, the fainter more bluish.

zeta Psc (**)

Name: zeta Psc, 86 Psc, STF100
Type: **
Constellation: Psc
Coordinates: 01h13m43.80s / +07°34'31.80"
Components: AB / v5.2 mag / v6.3 mag / 22.9" / 63° / 2016
8" f/6, 37x, Bortle 4-, NELM 5.7+, SQM-L 20.8
Visually evident as double star and easy to find. Well split with slight difference in brightness.