η Cephei (eta Cephei)
η Cephei is a double hypergiant star of spectral class K0 in the constellation of Cepheus.
η Cephei visual magnitude is 3.43. Because of its moderate brightness, η Cephei is easily visible to the naked eye from locations with dark skies, while it might be barely visible, or not visible at all, from light-polluted skies.
Celestial Coordinates
Apparent
J2000
Galactic Coordinates
Finder Chart
Magnitude, Color, Spectral Class
The red dot in the diagram below shows where η Cephei is situated in the Hertzsprung–Russell diagram.
Star System Properties
η Cephei 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 η Cephei double sysyem:
Distance, Radial Speed, Proper Motion
η Cephei is distant 46.75 light years from the Sun and it is moving towards the Sun at the speed of 87 kilometers per second.
Alternative Designations
Visibility from Your Location
η Cephei (eta Cephei) is circumpolar and transits at 04:37 UTC (altitude: 79.5°)