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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]
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 ...
The Iris Nebula (also known as NGC 7023 and Caldwell 4) is a bright reflection nebula in the constellation Cepheus. The designation NGC 7023 refers to the open cluster within the larger reflection nebula designated LBN 487. The nebula, which shines at magnitude +6.8, is illuminated by a magnitude +7.4 star designated HD 200775. [1]
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.
The Elephant's Trunk Nebula is now thought to be a site of star formation, containing several very young (less than 100,000 yr) stars that were discovered in infrared images in 2003. Two older (but still young, a couple of million years, by the standards of stars , which live for billions of years) stars are present in a small, circular cavity ...
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 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′.
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]