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Zeta Cephei has a spectral classification of K1.5Ib, [3] indicating that it is a lower luminosity red supergiant star. It is about 173 times larger than the Sun and has a surface temperature of 4,393 K. [8] The luminosity of Zeta Cephei is approximately 10,000 times that of the Sun. [8] At a distance of about 840 light-years, [11] Zeta Cephei has an apparent magnitude (m) of 3.4 and an ...
Despite this, its size is far from the two known hypergiants in this constellation, Me Cephei and VV Cephei. [1] [3] [4] The bolometric luminosity of ST Cephei is 8,400 times greater than that of the Sun. It has a mass 9 times greater than the Sun, at the limit from which stars end their lives by exploding as supernovae.
S Cephei (S Cep), also designated as HD 206362, is a carbon star and Mira-type variable in the constellation Cepheus.Based on the measurement of its annual parallax by the Gaia satellite, the star is approximately ∼1,590 ly (∼487 pc) away from Earth.
The constellation Cepheus as it may be seen by the naked eye. Alderamin, also known as Alpha Cephei, is the brightest star in the constellation, with an apparent magnitude of 2.51. [5] Gamma Cephei, also known as Errai, is the second-brightest star in the constellation, with an apparent magnitude of 3.21. [6]
Eta Cephei (η Cep, η Cephei) is a star in the northern circumpolar constellation of Cepheus. With an apparent visual magnitude of 3.4, [2] this is a third magnitude star that, according to the Bortle Dark-Sky Scale, is readily visible to the naked eye. Parallax measurements put it at a distance of 14.37 parsecs (46.9 light-years) from Earth. [1]
Iota Cephei (ι Cephei, ι Cep) is a star in the northern constellation Cepheus. Based upon an annual parallax shift of 28.29 mas as seen from the Earth, [1] it is located about 115 light years from the Sun. The star is visible to the naked eye with an apparent visual magnitude of 3.5. [2] It is a K-type giant star with a stellar classification ...
Theta Cephei, Latinized from θ Cephei, is a stellar class A7, fourth-magnitude star in the constellation Cepheus.This displays at a metallic-line Am star. [4] It is a white-hued, single-lined spectroscopic binary system, located about 127 light-years from Earth.
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).