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Last update: 2019-05-19

VdS FG

- Double Stars (Boo) -

And (13) Cas (12) Crv (1) Gem (9) Mon (1) Sex (1)
Aql (4) Cep (9) CVn (2) Her (4) Oph (1) Tau (6)
Ari (5) CMa (1) Cyg (5) Leo (12) Ori (8) Tri (3)
Aur (15) Cnc (3) Del (2) LMi (4) Peg (4) UMa (5)
Boo (9) Com (1) Dra (5) Lyn (10) Per (3) UMi (1)
Cam (2) CrB (3) Eri (1) Lyr (2) Psc (1) Vir (6)

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 similarly bright components.

STF1835 (**)

Name: STF1835
Type: **
Constellation: Boo
Coordinates: 14h23m22.74s / +08°26'47.90"
Components: A-BC / v5.0 mag / v6.8 mag / 6.0" / 195° / 2016
102mm f/11, 62x
At 28x barely split with visible difference in brightness. At 62x easy to separate. The colors seemed similar.

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 primary 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 primary component. The primary component itself appeared slightly yellowish.

SKETCH

70mm f/5.7, 133x, Bortle 6, SQM-L 19.2
Easy to split, very unequal. A appeared in pale orange, B was visible as a very tiny, gray star on the first diffraction ring of component A.

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

STF1884 (**)

Name: STF1884
Type: **
Constellation: Boo
Coordinates: 14h48m23.37s / +24°22'01.00"
Components: v6.6 mag / v7.5 mag / 2.2" / 57° / 2016
102mm f/11, 86x
At 86x pretty tight and unequal. At 160x clearly split. A: white, B: slightly orange.

STF1886 (**)

Name: STF1886
Type: **
Constellation: Boo
Coordinates: 14h51m02.31s / +09°43'25.20"
Components: AB / v7.6 mag / v9.7 mag / 7.4" / 225° / 2012
102mm f/11, 28x
At 28x, the B-component appeared rather faint and pretty close to the primary component. At 62x both components were clearly visible and unequal. A: slightly orange, B: grayish.

STF1890 (**)

Name: STF1890, 39 Boo
Type: **
Constellation: Boo
Coordinates: 14h49m41.37s / +48°43'15.60"
Components: v6.3 mag / v6.7 mag / 2.7" / 47° / 2016
70mm f/5.7, 67x, Bortle 6, SQM-L 19.2
At 44x elongated, partly with constriction. At 67x split, but very tight. A difference in brightness was not seen. At 133x clearly separated with little difference in brightness. A appeared pale yellow, B rather warm-white.

STF1938 (**)

Name: STF1938, mu 2 Boo
Type: **
Constellation: Boo
Coordinates: 15h24m30.89s / +37°20'52.50"
Components: Ba-Bb / v7.1 mag / v7.6 mag / 2.3" / 4° / 2016
102mm f/11, 125x, Bortle 6-, SQM-L 19.2
Beautiful view! This triple system includes STFA 28 and STF 1938.

SKETCH

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.

70mm f/5.7, 22x, Bortle 6, SQM-L 19.2
Evident, very wide apart and unequal. A: white-yellowish, B: gray.

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
102mm f/11, 28x
Wide, moderately unequal pair. Little difference in color: Primary components appeared a bit more orange colored.

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.