SkyRef / Stars

Sadr

γ Cyg. Magnitude 2.20, yellow-orange. Comfortably visible to the naked eye from a suburban sky.

The numbers

Designationγ Cyg
Magnitude2.20
Colouryellow-orange
Right ascension20.370h
Declination+40.26°
B−V index0.68
CatalogueHR 7796

What you are looking at

Astronomers call it γ Cyg — the Bayer designation, which reads as a Greek letter ranking its brightness within its constellation. Sadr is the name people actually use.

Sadr shines at magnitude 2.20, making it comfortably visible to the naked eye from a suburban sky. Its B−V colour index of 0.68 makes it yellow-orange to the eye, corresponding to a surface temperature of around 5,000 K.

It sits at right ascension 20.37 hours and declination +40.3°. It sits well north on the sky and is comfortably placed for northern hemisphere observers.

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