USSN Cosmo-Fortress Juno (asteroid base)

Headquarters of the United States Space Navy and seat of their government after asteroid impact on Earth of 2056.
Full details at Nexus Files:
https://www.nexusarcana.com/Nexus_Files/United_States_Space_Navy/Cosmo_Fortress_Juno/Cosmo_Fortress_Juno.html