Alderamin

Alderamin (α Cephei) is a white main-sequence star in the constellation Cepheus. With an apparent magnitude of 2.44 it is the 87th-brightest star in the night sky, and it is about 49 light-years from Earth.

Finder chart showing where Alderamin is in the constellation Cepheus
Alderamin (circled) in Cepheus, with the surrounding constellations and bright stars.
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Facts

ConstellationCepheus
Designationα Cephei (Alpha Cephei), HR 8162
Apparent magnitude2.44 (87th brightest)
Spectral typeA7V
Colorwhite (B−V 0.22)
Distanceabout 49 light-years
Right ascension21 h 18.6 min
Declination+62.59°
Best monthSeptember (at about 9 pm)

Sources: star positions, magnitudes and colors from the Yale Bright Star Catalogue; constellation boundaries and star names from the IAU; areas and distances from Wikidata; stick figures by M. van der Sluys. How the maps are made.

How to find Alderamin

Alderamin is in Cepheus. From 40° N it never sets; it is highest in the north, about 67° up. From 35° S it stays below the horizon. Nearby bright stars: Deneb (18° away), Caph (21° away) and Sadr (24° away).

Cepheus constellation →

Other named stars in Cepheus

ErraiAlfirkKurhah

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