Unidentified Forerunner moon

The  is the unofficial name of a moon that was home to a Forerunner nuclear reactor near the end of the Ecumene.

History
The Forerunners selected the moon as home to a large nuclear reactor, as the frigid temperature would keep the overwhelming heat of the reactor in check. It functioned in this capacity for over 100,000 years, until the reactor began to malfunction causing a violent meltdown. The temperature became so hot that the average temperature of the moon began steadily increasing. ONI officials believe the moon will soon be destroyed by the intensifying heat.