7_Cephei
7 Cephei
Star in the constellation Cepheus
7 Cephei is a single[10] star located approximately 820 light years away, in the northern circumpolar constellation of Cepheus. It is visible to the naked eye as a dim, blue-white hued star with an apparent visual magnitude of 5.42.[2]
This is a B-type main-sequence star with a stellar classification of B7 V.[4] It is a candidate variable star with an amplitude of 9 micromagnitudes and a period of 0.737±0.002 d.[11] This object has 4.5[3] times the mass of the Sun and about three[6] times the Sun's radius. It is spinning rapidly with a projected rotational velocity of 236 km/s.[3] 7 Cephei is radiating 769[3] times the luminosity of the Sun from its photosphere at an effective temperature of 12,560 K.[3]