Mira Ceti 4 (Earth-9573)

Mira Ceti 4, also known as Kamchatka, is the fourth planet in the Mira Ceti system. A remote world, Mira Ceti 4 was once a base for the forerunner Ecumene. After the firing of the Halo Array, Mira Ceti 4 remained undiscovered in the fringes of civilization until 2568.

History
Mira Ceti 4 was used by the forerunner Builders as a base of operations within the Mira Ceti system for astroengineering. While it lacks the usual array of structures and facilities seen around the surface other former forerunner-held worlds, the planet features countless of structures buried within its ice and snow. The Stormbreak mountain range, considered to be the "the broken spine" of Mira Ceti 4, was mended by the forerunners.