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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]
Map showing location of NGC 6939. NGC 6939 is located near the border of the constellations Cepheus and Cygnus, at the southwest corner of Cepheus.The open cluster is located two degrees southwest of Eta Cephei and 2/3° northwest from the spiral galaxy NGC 6946, which has visual magnitude 8.7.
IRAS 22036+5306, also known as 2MASS J22053028+5321327, is a protoplanetary nebula located in the constellation Cepheus at approximately ~6,500 light-years from Earth. [2] [1] The nebula was created by the shedding of most of the material in the outer shell of an aging star. The gas cloud formed is heated by the still burning hot core of the ...
NGC 6946, sometimes referred to as the Fireworks Galaxy, is a face-on intermediate spiral galaxy with a small bright nucleus, whose location in the sky straddles the boundary between the northern constellations of Cepheus and Cygnus. Its distance from Earth is about 25.2 million light-years or 7.72 megaparsecs, [2] similar to the distance of ...
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]
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).
Gamma Cephei Ab (abbreviated γ Cephei Ab, γ Cep Ab), formally named Tadmor / ˈ t æ d m ɔːr /, is an exoplanet approximately 45 light-years away in the constellation of Cepheus (the King). The planet was confirmed to be in orbit around Gamma Cephei A in 2003, but was first suspected to exist around 1988 (making this planet arguably the ...
NGC 7380 is a young [4] open cluster of stars in the northern circumpolar constellation of Cepheus, discovered by Caroline Herschel in 1787. The surrounding emission nebulosity is known colloquially as the Wizard Nebula, which spans an angle of 25′.