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Alpha Cephei (α Cephei, abbreviated Alpha Cep, α Cep), officially named Alderamin / æ l ˈ d ɛr ə m ɪ n /, [10] [11] is a second magnitude star in the constellation of Cepheus near the northern pole. The star is relatively close to Earth at 49 light years (ly) and drifting closer with a heliocentric radial velocity of about −16 km/s.
The constellation's brightest star is Alderamin (Alpha Cephei), with an apparent magnitude of 2.5. Delta Cephei is the prototype of an important class of star known as a Cepheid variable. RW Cephei, an orange hypergiant, together with the red supergiants Mu Cephei, MY Cephei, VV Cephei, V381 Cephei, and V354 Cephei are among the largest stars ...
Alpha Corvi; Alcor (star) Alcyone (star) Aldebaran; Alpha Cephei; Gamma Gruis; Zeta Draconis; Epsilon Delphini; Beta Cephei; Alpha2 Capricorni; Gamma Pegasi; Epsilon Leonis; Gamma Leonis; Alpha1 Capricorni; Algol; Delta Corvi; 15 Ursae Majoris; Tau Ursae Majoris; 18 Ursae Majoris; 23 Ursae Majoris; Theta Ursae Majoris; Upsilon Ursae Majoris ...
β Cephei (Latinised to Beta Cephei) is the system's Bayer designation.The designations of the two constituents as Beta Cephei A and B, and those of A's components - Beta Cephei Aa and Ab - derive from the convention used by the Washington Multiplicity Catalog (WMC) for multiple star systems, and adopted by the International Astronomical Union (IAU).
[10] [11] Iota Cephei and Beta Cephei will stand on either side of the northern celestial pole some time around 5200 AD, before moving to closer alignment with the brighter star Alpha Cephei ("Alderamin") around 7500 AD. [10] [12] Precession will then point the north celestial pole at stars in the northern constellation Cygnus.
Gamma Cephei (γ Cephei, abbreviated Gamma Cep, γ Cep) is a binary star system approximately 45 light-years away in the northern constellation of Cepheus.The primary (designated Gamma Cephei A, officially named Errai / ɛ ˈ r eɪ. iː /, the traditional name of the system) [11] [12] is a stellar class K1 orange giant or subgiant star; it has a red dwarf companion (Gamma Cephei B).
ξ Cephei (Latinised to Xi Cephei) is the system's Bayer designation.The designations of the three constituents as ξ Cephei A, B and C, and those of A's components - ξ Cephei Aa and Ab - derive from the convention used by the Washington Multiplicity Catalog (WMC) for multiple star systems, and adopted by the International Astronomical Union (IAU).
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