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Last update: 2018-05-21

VdS FG

- Double Stars (Boo) -

And (7) Cam (2) Com (1) Dra (1) LMi (4) Per (1)
Aql (3) Cas (11) CVn (2) Gem (2) Oph (1) Psc (1)
Ari (4) Cep (3) Cyg (4) Her (2) Ori (7) Tau (5)
Boo (2) CMa (1) Del (2) Leo (1) Peg (4) UMa (3)

epsilon Boo (**)

Name: epsilon Boo, STF1877, Izar
Type: **
Constellation: Boo
Coordinates: 14h44m59.14s / +27°04'29.90"
Components: AB / v2.6 mag / v4.8 mag / 2.9" / 343° / 2015
60mm f/10, 193x, Bortle 6-, SQM-L 19.1
Easy to split, whereby the much fainter component lies on the first diffraction ring of the main component. The main component itself appeared slight yellowish.

--> Sketch

120mm f/5, 193x, Bortle 4, SQM-L 21.3
At 85x the fainter component was easily visible but not separated. At 193x well split. The fainter component was almost on the first diffraction ring of the main component. Quite big difference in brightness. I did not looked at the color of the components.

mu Boo (**)

Name: mu Boo, 51 Boo, STFA28
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.