- Stars with a name
- Alderamin
Alderamin
α Cephei
Alderamin is a white star, in the constellation Cepheus. The light you see from it tonight left it around 1977.
Where to find it
From mid-northern latitudes, such as New York, Rome or Tokyo, it never sets: it circles the pole all night, all year.
Bright enough to see even from a city. Apparent magnitude 2.45.
What it’s like
It gives off 21 times as much light as the Sun.
Its surface is at about 7,700 degrees.
It is 49.1 light years away: 464 trillion kilometres.
It is the star of people born around 1977: the light that left it then is reaching Earth now.