SkyRef / Stars

Kochab

β UMi. Magnitude 2.08, orange-red. Comfortably visible to the naked eye from a suburban sky.

The numbers

Designationβ UMi
Magnitude2.08
Colourorange-red
Right ascension14.845h
Declination+74.16°
B−V index1.47
CatalogueHR 5563

What you are looking at

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

Kochab shines at magnitude 2.08, making it comfortably visible to the naked eye from a suburban sky. Its B−V colour index of 1.47 makes it orange-red to the eye, corresponding to a surface temperature of under 4,000 K.

It sits at right ascension 14.85 hours and declination +74.2°. 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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