SkyRef / Stars

Alderamin

α Cep. Magnitude 2.44, white. Comfortably visible to the naked eye from a suburban sky.

The numbers

Designationα Cep
Magnitude2.44
Colourwhite
Right ascension21.310h
Declination+62.59°
B−V index0.22
CatalogueHR 8162

What you are looking at

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

Alderamin shines at magnitude 2.44, making it comfortably visible to the naked eye from a suburban sky. Its B−V colour index of 0.22 makes it white to the eye, corresponding to a surface temperature of around 8,000 K.

It sits at right ascension 21.31 hours and declination +62.6°. It is circumpolar from most of the northern hemisphere, meaning it never sets and can be found on any clear night.

Find it tonight

SkyRef shows exactly where Alderamin is from your location right now — altitude, compass direction, and rise and set times.

Open the live sky map →

Other named stars

SiriusCanopusArcturusRigil KentaurusVegaCapellaRigelProcyonAchernarBetelgeuseHadarAltairAldebaranAntaresSpicaPolluxFomalhautMimosaDenebAcruxRegulusAdharaShaulaBellatrixElnathMiaplacidusAlnilamAliothMirfakDubheKaus AustralisAlkaidMenkalinanAlhenaCastorAlphard