- Double Stars (Cep) -

And (32) Cep (13) CVn (4) Her (13) Oph (1) Tau (11)
Aql (9) Cet (1) Cyg (19) Hya (1) Ori (8) Tri (4)
Ari (8) CMa (1) Del (2) Leo (14) Peg (16) UMa (11)
Aur (27) Cnc (10) Dra (8) LMi (4) Per (18) UMi (1)
Boo (8) Com (1) Equ (5) Lyn (16) Psc (7) Vir (6)
Cam (5) CrB (4) Eri (1) Lyr (8) Ser (2)
Cas (17) Crv (1) Gem (19) Mon (1) Sex (1)

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, B appears rather grey-blueish.

80mm f/6.25, 25x
AC: Obvious difference in brightness and color. Brighter component slightly orange, weaker bluish. Could be Albireo's little brother ;)

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

../images/binary-star-orbits/H1-48-orbit.jpg

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

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.

../images/binary-star-orbits/KR60-AB-orbit.jpg

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?

STF 2675 (**)

Name: STF2675, kappa Cep, 1 Cep
Type: **
Constellation: Cep
Coordinates: 20h08m53.32s / +77°42'40.90"

Components:
m1 m2 ρ θ Year
AB 4m4 8m3 7.3" 120° 2015
Robert Zebahl
55mm f/9.1, 38x, Bortle 6
At 27x faint companion not visible. At 38x and higher magnification the companion is quite easily visible as faint, tiny star. Very nice, uneven pair!

STF 2807 (**)

Name: STF2807
Type: **
Constellation: Cep
Coordinates: 21h17m33.47s / +82°31'03.70"

Components:
m1 m2 ρ θ Year
8m7 8m8 1.9" 309° 2016

../images/binary-star-orbits/STF2807-orbit.jpg

Robert Zebahl
70mm f/5.7, 128x, Bortle 5, NELM 5m7, SQM-L 20.6
Barely split without any noticeable difference in brightness.

STF 2840 (**)

Name: STF2840
Type: **
Constellation: Cep
Coordinates: 21h52m01.02s / +55°47'48.30"

Components:
m1 m2 ρ θ Year
AB 5m6 6m4 18.1" 197° 2018
Robert Zebahl
55mm f/9.1, 25x
Striking double star with clear distance and difference in brightness.

70mm f/5.7, 22x, Bortle 6-
Striking, beautiful double star with visible difference in brightness. At 44x A appeared rather yellowish, B slightly blueish, whereby the colors were difficult to detect.

STF 2845 (**)

Name: STF2845
Type: **
Constellation: Cep
Coordinates: 21h52m20.95s / +63°06'04.50"

Components:
m1 m2 ρ θ Year
AB 8m1 8m2 2.0" 173° 2016
Robert Zebahl
70mm f/5.7, 128x, Bortle 4-, SQM-L 20.9
Easy to split with equally bright components.

STF 2863 (**)

Name: STF2863, xi Cep, 17 Cep
Type: **
Constellation: Cep
Coordinates: 22h03m47.45s / +64°37'40.70"

Components:
m1 m2 ρ θ Year
AB 4m5 6m4 8.2" 274° 2019

../images/binary-star-orbits/STF2863-AB-orbit.jpg

Robert Zebahl
55mm f/9.1, 27x, Bortle 6
At 27x well separable, but quite close together with a clear difference in brightness. At 71x very nice view.

STF 2873 (**)

Name: STF2873
Type: **
Constellation: Cep
Coordinates: 21h58m13.53s / +82°52'10.80"

Components:
m1 m2 ρ θ Year
AB 7m0 7m5 13.8" 66° 2017

../images/binary-star-orbits/STF2873-AB-orbit.jpg

Robert Zebahl
55mm f/9.1, 25x
Easy to split with visible difference in brightness. Stands out immediately.

STF 2903 (**)

Name: STF2903
Type: **
Constellation: Cep
Coordinates: 22h21m45.20s / +66°42'22.60"

Components:
m1 m2 ρ θ Year
7m1 7m8 4.1" 97° 2017
Robert Zebahl
55mm f/9.1, 55x
At 55x split with noticeable difference in brightness. At 83x very well split with significantly fainter component.

STF 2947 (**)

Name: STF2947
Type: **
Constellation: Cep
Coordinates: 22h49m00.68s / +68°34'12.20"

Components:
m1 m2 ρ θ Year
AB 6m9 7m0 4.7" 56° 2018
Robert Zebahl
55mm f/9.1, 40x
At 25x elongated, at 40x split, but tight. At 55x well split, almost equally bright.

STF 2971 (**)

Name: STF2971
Type: **
Constellation: Cep
Coordinates: 22h56m41.48s / +78°29'45.00"

Components:
m1 m2 ρ θ Year
8m0 8m9 5.6" 2019
Robert Zebahl
55mm f/9.1, 40x
At 25x split to some extend. At 40x well split with noticeable difference in brightness.