SkyRef / Stars

Ruchbah

δ Cas. Magnitude 2.68, white. Comfortably visible to the naked eye from a suburban sky.

The numbers

Designationδ Cas
Magnitude2.68
Colourwhite
Right ascension1.430h
Declination+60.24°
B−V index0.13
CatalogueHR 403

What you are looking at

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

Ruchbah shines at magnitude 2.68, making it comfortably visible to the naked eye from a suburban sky. Its B−V colour index of 0.13 makes it white to the eye, corresponding to a surface temperature of around 8,000 K.

It sits at right ascension 1.43 hours and declination +60.2°. It is circumpolar from most of the northern hemisphere, meaning it never sets and can be found on any clear night.

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