ο Cephei (omicron Cephei)
ο Cephei is a variable and multiple hypergiant star of spectral class K0 in the constellation of Cepheus.
ο Cephei visual magnitude is 4.75. Because of its moderate brightness, ο 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 ο Cephei is situated in the Hertzsprung–Russell diagram.
Star System Properties
ο Cephei is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the ο Cephei double sysyem:
Distance, Radial Speed, Proper Motion
ο Cephei is distant 210.59 light years from the Sun and it is moving towards the Sun at the speed of 18 kilometers per second.
Alternative Designations
Visibility from Your Location
ο Cephei (omicron Cephei) is circumpolar and transits at 07:11 UTC (altitude: 73.2°)