Alderamin is the proper name of the star α Cephei in the constellation of Cepheus. Alderamin is a fairly sun-like star, albeit somewhat hotter and more massive. It appears to be nearing the end of its life as a main sequence star, and may begin fusing helium as it swells into a red giant or perhaps a subgiant. Alderamin is noted for having an unusually fast rotation, although the effects of this rotation are not well understood.
The name Alderamin is a contraction of the Arabic phrase الذراع اليمن ađ-đirā‘ al-yaman "the right arm", with the first definite article transliterated literally as al, as is often the case with Arabic star names.
