---
name: Alderamin (α Cep)
constellation: Cep
created_by: editor.cs
created_date: 2022-01-21 17:00:00
updated_by: skybber
updated_date: 2022-01-23 13:37:13.967876
---
the brightest star in the constellation at 2.44mag. It is a yellow-white star of spectral class A7, 49 light-years away, forming the constellation's rhombus along with β (3.21mag), ζ (3.35mag) and ι (3.52mag). At its centre lies the star ξ Cep. Alderamin becomes the closest star to the north celestial pole around 7500 AD due to precession of the Earth's axis. It has 17 times the luminosity of the Sun.