- Double Stars (Cas) -

And (13) Cep (9) Cyg (4) LMi (4) Per (3) UMi (1)
Aql (9) CMa (1) Del (2) Lyn (9) Psc (1) Vir (6)
Ari (5) Cnc (2) Dra (8) Lyr (5) Ser (1)
Aur (15) Com (1) Eri (1) Mon (1) Sex (1)
Boo (8) CrB (3) Gem (9) Oph (1) Tau (6)
Cam (2) Crv (1) Her (12) Ori (8) Tri (3)
Cas (11) CVn (2) Leo (11) Peg (4) UMa (4)

BU1 (**)

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

Components:
m1 m2 ρ θ Year
AC 8.6 8.9 3.9" 134° 2017
AD 8.6 9.7 9.0" 194° 2017
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.

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 3.5 7.4 13.4" 325° 2016
STF60 AC 3.5 11.4 225.0" 260° 2000
STF60 AD 3.5 12.8 189.4" 354° 2011
STF60 AE 3.5 10.2 75.6" 126° 2015
STF60 AF 3.5 11.5 378.3" 276° 2000
STF60 AG 3.5 9.5 419.7" 259° 2012
STF60 AH 3.5 8.4 701.1" 355° 2012
SMR2 AI 3.5 11.6 90.3" 73° 2012
SMR2 AJ 3.5 12.3 237.1" 262° 2012
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.

H5 82 (**)

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

Components:
m1 m2 ρ θ Year
AB 8.0 8.3 57.2" 75° 2017
70mm f/5.7, 26x, Bortle 7
Almost equally bright components with large angular distance.

STF59 (**)

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

Components:
m1 m2 ρ θ Year
AB 7.2 8.1 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:
m1 m2 ρ θ Year
8.0 8.0 3.2" 220° 2017
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:
m1 m2 ρ θ Year
AB 8.8 9.8 3.0" 185° 2016
70mm f/5.7, 100x, Bortle 7
Clearly split with visible difference in brightness.

STF163 (**)

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

Components:
m1 m2 ρ θ Year
AB 6.8 9.1 34.5" 38° 2018
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:
m1 m2 ρ θ Year
7.5 8.2 3.2" 244° 2016
70mm f/5.7, 57x, Bortle 7
At 57x barely split with noticeable difference in brightness. At 128x easy split.

STF182 (**)

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

Components:
m1 m2 ρ θ Year
AB 8.3 8.3 3.6" 125° 2016
70mm f/5.7, 57x, Bortle 7
At 44x almost split. At 57x equally bright components visible.

STF3053 (**)

Name: STF3053
Type: **
Constellation: Cas
Coordinates: 00h02m36.08s / +66°05'56.30"

Components:
m1 m2 ρ θ Year
AB 6.0 7.2 15.2" 71° 2018
63mm f/13.3, 46x
Easy to split with noticeable difference in brightness. Brighter component appeared slightly orange, fainter one bluish.

WZ Cas (**)

Name: WZ Cas, STTA254
Type: **
Constellation: Cas
Coordinates: 00h01m15.85s / +60°21'19.00"

Components:
m1 m2 ρ θ Year
AB 7.4 8.3 58.0" 89° 2017
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.