A mining complex on Earth's Moon that John Frederick Paxton used as the headquarters of Terra Prime in 2155, and which concealed a warp-capable ship.
The Orpheus mining colony is a facility on Luna seen in the Enterprise episodes Demons and Terra Prime. It is owned by John Frederick Paxton, whose mining interests pay for the xenophobic Terra Prime movement.
In 2155 the trail of a murdered woman and a mysterious Vulcan-human infant leads Tucker and T'Pol to go undercover among the miners. They are found out and captured, and Paxton shows what the colony really is: the whole central complex lifts off the lunar surface and goes to warp.
Paxton flies it to Mars and lands beside the verteron array, which he takes over in order to threaten every non-human in the system.