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Last update: 2018-10-14

VdS FG

- Double Stars -

And (11) Cas (11) CVn (2) Her (3) Ori (7) Tri (2)
Aql (4) Cep (9) Cyg (5) Leo (1) Peg (4) UMa (3)
Ari (4) CMa (1) Del (2) LMi (4) Per (1)
Boo (4) Com (1) Dra (1) Lyr (2) Psc (1)
Cam (2) CrB (3) Gem (2) Oph (1) Tau (5)

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
70mm f/5.7, 44x, Bortle 7+, SQM-L 18.8
Very nice view. Both components appeared similar 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.

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
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.

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.

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 blueish. 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 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 blueish.

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

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 blueish.

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
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.

STF212 (**)

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

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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
120mm f/5, 66x, Bortle 6-, SQM-L 19.1
At 48x easily seen as double star. It appeared as '8'. At 66x barely, but clearly split with visible difference in brightness.

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.

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.

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.

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 blueish, 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 similar bright components.

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 main 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 main component. The main component itself appeared slight yellowish.

SKETCH

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 main component. Quite big difference in brightness. I did not looked at the color of the components.

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
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
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.

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.

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.

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.

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.

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
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.

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 blueish.

xi UMa (**)

Name: xi UMa, 53 UMa, STF1523, Alula Australis
Type: **
Constellation: UMa
Coordinates: 11h18m10.90s / +31°31'45.00"
Components: AB / v4.3 mag / v4.8 mag / 1.9" / 164° / 2017
70mm f/5.7, 100x, Bortle 6
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
Well split with slight difference in brightness.

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.