- Double Stars (Com) -

And (55) Cep (25) Cyg (93) Leo (35) Peg (34) SGE (1)
Aql (52) Cet (5) Del (16) Lep (6) Per (35) Sgr (10)
Aqr (4) CMa (5) Dra (19) Lib (1) Psc (17) Tau (15)
Ari (8) CMi (3) Equ (7) LMi (6) Pup (1) Tri (5)
Aur (28) Cnc (10) Eri (3) Lyn (18) Sco (4) UMa (46)
Boo (32) Com (13) Gem (30) Lyr (32) Sct (4) UMi (5)
Cam (17) CrB (10) Her (58) Mon (12) Ser (21) Vir (20)
Cap (6) Crv (4) Hya (11) Oph (14) Sex (6) Vul (12)
Cas (39) CVn (16) Lac (13) Ori (38) Sge (8)

BGH 46 (**)

Name: BGH46
Type: **
Constellation: Com
Coordinates: 13h16m32.26s / +19°47'07.00"

Components:
m1 m2 ρ θ Year
AB 6m5 7m6 202.9" 58° 2015
Robert Zebahl
B 8x40
2020-04-05: Widely separated with well visible difference in brightness. A appeared slightly white-bluish, B darker in color and not clearly definable.

SHJ 143 (**)

Name: SHJ143, 12 Com
Type: **
Constellation: Com
Coordinates: 12h22m30.32s / +25°50'46.30"

Components:
m1 m2 ρ θ Year
AB 4m9 11m8 37.0" 57° 2015
AC 4m9 8m9 65.2" 167° 2015
René Merting
12.5" f/4.5, 72x
AC: bei 72x ist Komponente C weit abseits im Süden von A erkennbar - der Hauptstern strahlt maisgelb, C grau, dadurch schöner Farbkontrast

STF 1596 (**)

Name: STF1596, 2 Com
Type: **
Constellation: Com
Coordinates: 12h04m16.60s / +21°27'33.00"

Components:
m1 m2 ρ θ Year
6m2 7m5 3.7" 236° 2017
Robert Zebahl
70mm f/5.7, 100x
2020-04-04: At 44x almost separated, but clearly visible as figure '8'. At 57x just separated with clearly noticeable difference in brightness. At 100x easy to separate. Primary component appeared white-orange, companion rather greyish.

René Merting
100mm f/6.4, 107x
bei 107x setzt sich Komponente B knapp ab und zeigt sich westlich von A - Helligkeitsunterschied gut 1.5 Größenklassen

STF 1615 (**)

Name: STF1615
Type: **
Constellation: Com
Coordinates: 12h14m06.61s / +32°47'03.20"

Components:
m1 m2 ρ θ Year
AB 7m0 8m6 26.8" 88° 2019
René Merting
B 18x70
ein schickes enges ungleiches Pärchen - Komponente B steht nicht zu knapp getrennt von A im Osten - Helligkeitsunterschied etwa zwei Größenklassen - Komponente strahlt warmweiß, B grauweiß

STF 1633 (**)

Name: STF1633
Type: **
Constellation: Com
Coordinates: 12h20m41.37s / +27°03'16.40"

Components:
m1 m2 ρ θ Year
7m0 7m1 8.9" 245° 2017
Robert Zebahl
70mm f/5.7, 22x
2020-04-04: At 22x beautiful pair of equally bright components at quite small separation. At 44x a slight color difference was visible: white-orange & white-bluish.

René Merting
12.5" f/4.5, 72x
bei 72x ein schönes Pärchen zweier gleich heller Sterne - dicht beieinander stehend, aber gut getrennt - obwohl beide mitten im Coma Cluster stehen, zeigen sie sich schön isoliert

STF 1639 (**)

Name: STF1639
Type: **
Constellation: Com
Coordinates: 12h24m26.81s / +25°34'56.70"

Components:
m1 m2 ρ θ Year
AB 6m7 7m8 1.8" 323° 2018
AC 6m7 11m4 91.4" 159° 2015

../images/binary-star-orbits/STF1639-AB-orbit.jpg

Robert Zebahl
70mm f/5.7, 133x
AB: 2020-04-04: The double star is clearly elongated, with the fainter companion attached to the primary component.

STF 1657 (**)

Name: STF1657, 24 Com
Type: **
Constellation: Com
Coordinates: 12h35m07.76s / +18°22'37.40"

Components:
m1 m2 ρ θ Year
5m1 6m3 20.2" 272° 2018
Robert Zebahl
70mm f/5.7, 22x
2020-04-04: Splendid sight! Very nice difference in brightness and color: pale orange & grey-blue.

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 6m0, SQM-L 21.0
Well split with obvious difference in brightness. Fainter component appeared bluish, the brighter one slightly orange.

René Merting
B 18x70
ein wunderschönes eng stehendes FG-Sternpaar - Komponente B im Westen ist 1.5 Magnituden schwächer - A strahlt weißgelb, B wirkt dagegen etwas unterkühlt

STF 1678 (**)

Name: STF1678
Type: **
Constellation: Com
Coordinates: 12h45m26.17s / +14°22'24.90"

Components:
m1 m2 ρ θ Year
7m2 7m7 37.5" 170° 2018
Robert Zebahl
B 8x40
2020-04-05: Clearly separated, but still quite close together with a fainter companion. Well visible difference in brightness without any detectable colors.

70mm f/5.7, 22x
2020-04-04: At 22x noticeable double star with slight difference in brightness. Primary component appeared white-yellowish, companion appeared slightly orange. The color impression was a little better visible at 44x.

René Merting
B 18x70
ein schönes helles Sternpaar, komfortabel getrennt - Komponente B im Süden ist nur minimal schwächer als A

STF 1685 (**)

Name: STF1685
Type: **
Constellation: Com
Coordinates: 12h51m54.80s / +19°10'19.90"

Components:
m1 m2 ρ θ Year
AB 7m3 7m8 16.0" 202° 2018
Robert Zebahl
70mm f/5.7, 22x
2020-04-04: Lovely sight! Beautifully separated with little difference in brightness. Together with two other brighter stars the double star forms an almost right-angled triangle. At 44x the primary component appears in pale orange, the companion rather grey-bluish.

../sketches/2020-04-04_stf1685.jpg

René Merting
B 18x70
ein schicker FG-Doppelstern - ein enges Paar mit der leicht schwächeren Komponente B im Süden - schwacher Farbkontrast, der wieder mal zwischen den Sternen hin und her zu springen scheint

STF 1737 (**)

Name: STF1737
Type: **
Constellation: Com
Coordinates: 13h21m48.68s / +17°45'55.70"

Components:
m1 m2 ρ θ Year
7m8 10m3 15.3" 219° 2016
René Merting
12.5" f/4.5, 45x
bei 45x einfach - Komponente B steht gut abgesetzt westlich von A - Helligkeitsunterschied gut 2.5 Magnituden - bei 72x kommt der Farbunterschied etwas besser zur Geltung - A erscheint weiß, B weißgrau

STFA 21 (**)

Name: STFA21, 17 Com, AI Com
Type: **
Constellation: Com
Coordinates: 12h28m54.72s / +25°54'46.40"

Components:
m1 m2 ρ θ Year
AB 5m2 6m6 146.4" 251° 2018
René Merting
12.5" f/4.5, 72x
bei 72x ein weit auseinander stehendes Paar - schöner Farbkontrast, A weißblau, B im SW leicht gelblich schimmernd

STFA 23 (**)

Name: STFA23, 32 Com
Type: **
Constellation: Com
Coordinates: 12h52m12.26s / +17°04'26.20"

Components:
m1 m2 ρ θ Year
AB 6m5 7m0 196.3" 51° 2015
AC 6m5 8m9 905.4" 262° 2015
Robert Zebahl
B 8x40
AB: 2020-04-05: Widely separated pair. The component A (32 Com) appeared slightly orange, the component B rather grey-bluish. Overall a beautiful sight. The double star is located right in the middle between the two bright stars 27 & 36 Com.

STT 245 (**)

Name: STT245
Type: **
Constellation: Com
Coordinates: 12h17m30.60s / +28°56'13.60"

Components:
m1 m2 ρ θ Year
5m7 11m2 8.4" 282° 2016
René Merting
12.5" f/4.5, 144x
bei 72x nichts - bei 144x zeigt sich Komponente B schön abgesetzt westlich von A - der Hauptstern ist gleißend weiß, B ist ein kleines unscheinbares, farbloses Pünktchen - trotzdem nicht uninteressant