- Double Stars (vir) -

And (32) Cep (13) CVn (11) Her (15) Mon (1) Sex (2)
Aql (9) Cet (1) Cyg (25) Hya (4) Oph (1) Tau (11)
Ari (8) CMa (1) Del (4) Leo (21) Ori (8) Tri (4)
Aur (27) Cnc (10) Dra (11) Lib (1) Peg (16) UMa (36)
Boo (19) Com (8) Equ (5) LMi (6) Per (18) UMi (1)
Cam (10) CrB (4) Eri (1) Lyn (18) Psc (7) Vir (6)
Cas (17) Crv (1) Gem (19) Lyr (11) Ser (3) Vul (3)

SHJ 146 (**)
Name: SHJ146
Type: **
Constellation: Vir
Coordinates: 12h31m14.61s / +01°19'37.00"

Components:
m1 m2 ρ θ Year
AB 7m7 8m7 49.5" 290° 2017
Robert Zebahl
70mm f/5.7, 33x, Bortle 6, SQM-L 19.5
Visible difference in brightness and color. I couldn't precisely define the colors itself, but A appeared rather orange, B rather bluish.
102mm f/11, 28x
Pretty wide pair with visible difference in brightness and lovely color contrast. A: pale orange, B: light blue.

STF 1670 (**)
Name: STF1670, gamma Vir, 29 Vir, Porrima
Type: **
Constellation: Vir
Coordinates: 12h41m39.60s / -01°26'57.90"

Components:
m1 m2 ρ θ Year
AB 3m5 3m5 2.7" - 2018

../images/binary-star-orbits/STF1670-AB-orbit.jpg

Robert Zebahl
55mm f/9.1, 56x
2019-05-18: At 38x slightly elongated. At 56x touching diffraction disks. At 71x clearly separated with very small gap.
70mm f/5.7, 104x, Bortle 6, SQM-L 19.5
2019-05-04: At 47x clearly visible as '8', at 73x split with almost touching diffraction disks. At 104x clearly separated, equally bright and pretty close together. The gap was smaller than the diameter of the diffraction disk.
102mm f/11, 125x
2019-05-01: Extremely nice double star! Equally bright and relatively close together. Both components appeared yellowish-white.

STF 1724 (**)
Name: STF1724, theta Vir, 51 Vir
Type: **
Constellation: Vir
Coordinates: 13h09m57.01s / -05°32'20.10"

Components:
m1 m2 ρ θ Year
AB 4m4 9m4 6.8" 342° 2014
Robert Zebahl
70mm f/5.7, 47x, Bortle 6, SQM-L 19.5
Easy to split with large difference in brightness. Very faint B component clearly apart from the primary component.

STF 1734 (**)
Name: STF1734
Type: **
Constellation: Vir
Coordinates: 13h20m41.57s / +02°56'31.90"

Components:
m1 m2 ρ θ Year
6m8 7m3 1.1" 173° 2017

../images/binary-star-orbits/STF1734-orbit.jpg

Robert Zebahl
70mm f/5.7, 104x, Bortle 6, SQM-L 19.5
Double star appeared slightly elongated without noticeable notching.

STF 1740 (**)
Name: STF1740
Type: **
Constellation: Vir
Coordinates: 13h23m39.16s / +02°43'24.00"

Components:
m1 m2 ρ θ Year
7m1 7m4 25.6" 75° 2018
Robert Zebahl
70mm f/5.7, 33x, Bortle 6, SQM-L 19.5
Easy to separate, slightly unequal with moderate angular distance. A: pale orange, B: color not clearly perceptible.

STF 1788 (**)
Name: STF1788
Type: **
Constellation: Vir
Coordinates: 13h54m58.20s / -08°03'31.90"

Components:
m1 m2 ρ θ Year
AB 6m7 7m3 3.7" 101° 2018

../images/binary-star-orbits/STF1788-AB-orbit.jpg

Robert Zebahl
70mm f/5.7, 47x, Bortle 6, SQM-L 19.5
Very nice view! Pretty tight together with a moderate difference in brightness.