51 Pegasi system

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There is more information available on this subject at 51 Pegasi system on the English Wikipedia.

51 Pegasi is a stellar system approximately 50.1 light years away from Earth, in the constellation Pegasus.[1] The star's planetary system is home to the planet 51 Pegasi B and its moon Pegasi Delta,[2] whose rich oceans were mined by the Covenant for deuterium and tritium in 2545. The Covenant refinery complex was the target of a UNSC strike in Operation: TORPEDO, which led to the demise of all but two Beta Company SPARTAN-IIIs.[3]


51 Pegasi was the very first main-sequence (Sun-like) star discovered to have a planet in orbit around it.

List of appearances[edit]


  1. ^ Wikipedia's article on 51 Pegasi
  2. ^ Halo: Ghosts of Onyx, page 13
  3. ^ Halo: Ghosts of Onyx, page 15