Chu'ot

Chu'ot was a planet that the Jackal homeworld orbited as a satellite.

It lies within the inner region of the system's massive asteroid belt. The worlds surface was characterized by a single large ocean, sparse volcanic activity and an almost total lack of glacification. About one third of the Kig-yar population in the Y'Deio system called the satellite, Eayn, their home. The remaining Jackals have chosen to set up colonies within the asteroid belt since their discovery by the Covenant.

Trivia
Chu'ot is based off the real extrasolar planet HD 69830 D, though whether the planet is actually terrestrial as suggested is unknown.