- Double Stars (vir) -

And (43) Cet (1) Del (4) Lib (1) Per (27) UMi (1)
Aql (9) CMa (2) Dra (11) LMi (6) Psc (10) Vir (9)
Ari (8) Cnc (10) Equ (5) Lyn (18) Pup (1) Vul (3)
Aur (28) Com (8) Eri (1) Lyr (11) Ser (3)
Boo (20) CrB (4) Gem (22) Mon (1) Sex (2)
Cam (11) Crv (1) Her (16) Oph (1) Tau (11)
Cas (17) CVn (14) Hya (4) Ori (9) Tri (4)
Cep (13) Cyg (26) Leo (24) Peg (16) UMa (38)

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 1575 (**)
Name: STF1575
Type: **
Constellation: Vir
Coordinates: 11h51m57.57s / +08°49'48.00"

Components:
m1 m2 ρ θ Year
7m4 7m9 30.5" 211° 2018
Robert Zebahl
B 16x70, Bortle 6-, SQM-L 19.0, Seeing 3/5
2021-03-02: Very nice view! Very striking in the field together with xi Vir, 4 & 6 Vir. Fairly bright with moderate separation. Slightly orange & grey-bluish.

STF 1591 (**)
Name: STF1591
Type: **
Constellation: Vir
Coordinates: 12h01m27.93s / -00°22'43.60"

Components:
m1 m2 ρ θ Year
AB 8m4 8m9 51.3" 351° 2017
AC 8m4 12m5 23.9" 52° 2017
Robert Zebahl
B 16x70, Bortle 6-, SQM-L 19.0, Seeing 3/5
AB: 2021-03-02: Rather faint double star with well visible brightness difference and moderate separation. Slightly orange & grey-bluish. North in the same field of view is the outstanding double star STTA 116.

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.

STTA 116 (**)
Name: STTA116
Type: **
Constellation: Vir
Coordinates: 12h01m56.96s / +00°06'07.50"

Components:
m1 m2 ρ θ Year
7m8 8m5 73.2" 177° 2018
Robert Zebahl
B 16x70, Bortle 6-, SQM-L 19.0, Seeing 3/5
2021-03-02: Bright, very easy and striking. The components appear almost equally bright, with the northern one slightly warmer in color. To the south is the fainter double star STF 1591.