- Double Stars (CrB) -

And (31) Cep (13) CVn (4) Her (12) Oph (1) Tau (11)
Aql (9) Cet (1) Cyg (19) Hya (2) Ori (8) Tri (5)
Ari (8) CMa (1) Del (2) Leo (12) Peg (16) UMa (11)
Aur (27) Cnc (9) 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 (3)
Cas (17) Crv (1) Gem (19) Mon (1) Sex (1)

sigma CrB (**)
Name: sigma CrB, 17 CrB, STF2032
Type: **
Constellation: CrB
Coordinates: 16h14m40.85s / +33°51'31.00"

Components:
m1 m2 ρ θ Year
AB 5m6 6m5 7.2" 239° 2019

../images/binary-star-orbits/STF2032-AB-orbit.jpg

Robert Zebahl
70mm f/5.7, 22x, Bortle 4, SQM-L 20.9
At 22x clearly separated, but very close with a clear difference in brightness. At 57x easy without any noticeable difference in color.

STF 1964 (**)
Name: STF1964
Type: **
Constellation: CrB
Coordinates: 15h38m12.91s / +36°14'48.60"

Components:
m1 m2 ρ θ Year
AC 8m1 8m1 14.5" 90° 2017
CD 8m1 9m0 1.5" 21° 2019

../images/binary-star-orbits/STF1964-CD-orbit.jpg

Robert Zebahl
102mm f/11, 62x
AC: Rather wide pair, equal without visible difference in color.
120mm f/5, 23x, Bortle 6, NELM 5m0+, SQM-L 19.4
AC: Nice double star, well split with equally bright components.

STF 1965 (**)
Name: STF1965, zeta 2 CrB
Type: **
Constellation: CrB
Coordinates: 15h39m22.68s / +36°38'09.00"

Components:
m1 m2 ρ θ Year
5m0 5m9 6.3" 306° 2019
Robert Zebahl
102mm f/11, 28x
At 28x very tight and barely split, unequal. At 86x very nice view. No difference in color: both components appeared white.
120mm f/5, 48x, Bortle 6, NELM 5m0+, SQM-L 19.4
Very nice double star, well split with noticeable difference in brightness.

STF 1973 (**)
Name: STF1973
Type: **
Constellation: CrB
Coordinates: 15h46m24.50s / +36°26'45.60"

Components:
m1 m2 ρ θ Year
7m6 8m8 30.8" 320° 2015
Robert Zebahl
120mm f/5, 23x, Bortle 6, NELM 5m0+, SQM-L 19.4
Nice double star, easy to split with noticeable difference in brightness.