Cepheus (Cep) is a constellation in the northern sky. It was one of the 48 constellations listed by the 2nd century astronomer Ptolemy, and remains one of the 88 modern constellations.

Cepheus is named after the king of Ethiopia who, according to Greek mythology, was forced to sacrifice his daughter Andromeda to the sea monster Cetus.

The Fireworks Galaxy (NGC 6946) is a spiral galaxy in which nine supernovae have been observed, more than in any other galaxy.

There are several prominent double stars and binary stars in Cepheus. Omicron Cephei (Omicron Cep, ο Cephei, ο Cep) is a binary star with a period of 800 years. The system, 211 light-years from Earth, consists of an orange-hued giant primary of magnitude 4.9 and a secondary of magnitude 7.1. Xi Cephei (ξ Cep, ξ Cephei) is another binary star, 102 light-years from Earth, with a period of 4000 years. It has a blue-white primary of magnitude 4.4 and a yellow secondary of magnitude 6.5.

Bordering constellations
Cygnus | Lacerta | Cassiopeia | Camelopardalis | Draco | Ursa Minor

  • Cepheus (constellation) Hevel
  • Cepheus (constellation) Uranias-Mirror
  • Cepheus is most commonly depicted as holding his arms aloft, praying for the gods to spare the life of Andromeda
  • He is also depicted as a more regal monarch sitting on his throne

WallHapp Catalogue (WH)

Lists of stars by constellation
WallHapp Catalogue (WH)