Alderamin - α Cephei (alpha Cephei)
Alderamin, also designated as α Cephei (alpha Cephei), is a variable and multiple main-sequence star of spectral class A7 in the constellation of Cepheus.
Alderamin visual magnitude is 2.44, making it the 85th brightest star in the sky. Because of its brightness, Alderamin is clearly visible to the naked eye when observed from locations with dark skies, and should be also quite easily visible from light polluted areas.
Celestial Coordinates
Apparent
J2000
Galactic Coordinates
Finder Chart
Magnitude, Color, Spectral Class
The red dot in the diagram below shows where Alderamin is situated in the Hertzsprung–Russell diagram.
Star System Properties
Alderamin is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the Alderamin double sysyem:
Distance, Radial Speed, Proper Motion
Alderamin is distant 48.77 light years from the Sun and it is moving towards the Sun at the speed of 10 kilometers per second.
Alternative Designations
Visibility from Your Location
Alderamin - α Cephei (alpha Cephei) is circumpolar and transits at 05:30 UTC (altitude: 78.8°)