- 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 temperature is about 7,500 degrees Celsius.
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.