Mausoleum was an abandoned early colony in the Belt. established as a mining colony in 2226 as an unlicened colony. The group that colonised this asteriod called themselves the Cassiopeia Collective.
History
While the colony intitally prospered, a bacteria infection appeared initially infecting children born in the colony, whon had weakened imune systems due to being raised in micro-gravity.
Eventually this bacteria spreading killing off the majority of the colonists. The survivors having been unsuccessfull reaching out to the United Nations Navy to come rescue them, built coffins for all the colonists hoping for vacum to allow someone in the future to resurect them.
In 2347 a scientist from Phoebe hid in this station with the MK core until killed by her accomplice. Camina Drummer would eventually find this module and take it onboard the Artemis[1]