Chi Ceti system

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Chi Ceti
Location overview

Distance from Sol:

77 light years (From Earth)[1]

Stellar overview

Orbiting planets:

At least 4

Societal overview


Unified Earth Government


The Chi Ceti system is a binary star system and a planetary system located in the far reaches of human-controlled space. It is home to the planet Chi Ceti IV, which houses the Materials Group's Damascus Testing Facility where the MJOLNIR Powered Assault Armor was first created.[2] A distant red nebula is visible from the system.[3]


Planetary system[edit]


Battle of Chi Ceti[edit]

In 2525, the Battle of Chi Ceti was fought here between the UNSC Commonwealth and the Covenant warship Unrelenting, resulting in the first UNSC victory of the war. The facility on Chi Ceti IV was evacuated shortly thereafter, along with the MJOLNIR armor.[6] In this battle, the Spartans successfully destroyed the Covenant ship, though Samuel-034 died in the process.[7]

Human-Covenant War[edit]

Although the system was initially lost to the Covenant,[8] Chi Ceti IV continued to be used by the Materials Group for research over the course of the Human-Covenant War; among several further developments by the Damascus facility was the MJOLNIR EOD variant.

Post War[edit]

The colony survived the Human-Covenant War and continues to support the UNSC by developing several MJOLNIR GEN2 armor variants.[9]

List of appearances[edit]


  1. ^ Halo Encyclopedia (2009 edition), UNSC Colonies, p. 286 (2009), p. 298 (2011)
  2. ^ Halo: The Fall of Reach, page 102
  3. ^ Halo: The Fall of Reach, page 103
  4. ^ a b c Halo Encyclopedia (2022 edition), page 49
  5. ^ Halo Encyclopedia (2022 edition), page 50
  6. ^ Halo: The Fall of Reach, page 119
  7. ^ Halo: The Fall of Reach, page 130
  8. ^ Halo: Reach, Data pad 14
  9. ^ Halo 4: The Essential Visual Guide, page 166