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Last update: 2017-11-14

VdS FG

- Double Stars -

This is just a small selection of evident, quite recommendable double stars. Some of these I have 'found' during starhopping.

And (4) Boo (1) Com (1) Del (2) Peg (4) Tau (5)
Aql (3) Cas (9) CVn (2) Her (2) Per (1) UMa (1)
Ari (2) Cep (3) Cyg (4) Oph (1) Psc (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
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.

24 Com (**)

Name: 24 Com, STF1657
Type: **
Constellation: Com
Coordinates: 12h35m07.76s / +18°22'37.40"
Components: v5.1 mag / v6.3 mag / 20.4" / 272° / 2016
8" f/6, 60x, Bortle 4, NELM 6.0, SQM-L 21.0
Well split with obvious difference in brightness. Fainter component appeared blueish, the brighter one slightly orange.

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 blueish.

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 blueish 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
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.

alpha CVn (**)

Name: alpha CVn, 12 CVn, Cor Caroli, STF1692
Type: **
Constellation: CVn
Coordinates: 12h56m01.67s / +38°19'06.20"
Components: AB / v2.9 mag / v5.5 mag / 20.0" / 229° / 2016
4.5" f/8, 28x, Bortle 6, NELM 5.3, SQM-L 19.7
Well split with big 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.

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 blueish. Seems to be little brother of Albireo ;)

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 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.

IC5006 (**)

DSS
© 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

mu Boo (**)

Name: mu Boo, 51 Boo, STFA28
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.

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, 133x
At 133x 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
© 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

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, 133x, Bortle 4-, SQM-L 20.9
Components equally bright, easy to split.

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, 102x, Bortle 7
At 57x elongated, at 102x barely, at 133x 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, 102x, Bortle 7
Clearly split with visible 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, 102x
At 102x party split, otherwise '8'-shaped. At 133x clearly split. Difference in brightness noticeable.

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 133x easy split.

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.

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.

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.

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.

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.

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

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.

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.

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, 102x
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, 102x
At 102x, barely, at 133x 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, 133x, Bortle 5, NELM 5.7, SQM-L 20.6
Barely split without any noticeable 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, 133x, Bortle 4-, SQM-L 20.9
Easy to split with equally bright components.

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, 102x
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, 102x
Rather faint, because I observed from the sidewalk with present moon. Well split with equally bright components.

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
70mm f/5.7, 102x
Wonderful double star. Easy to split with slight difference in brightness.

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.

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.

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 blueish.

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.