Beta Cephei
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Beta Cephei (β Cep / β Cephei) is a star in the constellation Cepheus. It also has the traditional name Alfirk.
Beta Cephei is the prototype of the Beta Cephei variable stars. Its magnitude varies between +3.15 and +3.21 with a period of 0.1904844 days. It belongs to the spectral class B2 IIIev and is 595 light years from Earth.
Coordinates for the epoch J2000:
- Right ascension: 21h28m39s
- Declination: +70°33'37"
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