Telsius Prime
Telsius Prime was a planet in the Delta Quadrant and homeworld of the Telsians. It was located 30,342.4 light years from Earth.
A mine on Telsius was visited by con artists Dala, Mobar, and Zar in 2376. Disguised as USS Voyager officers, they cheated the miners out of ten kilotons of Bolomite when the station was having a dilithium shortage. The mine's Chief of Mining Operations was Orek.
It was also the location of Telsian Security, which was known for having "persuasive methods of determining the truth". (VOY: "Live Fast and Prosper")
The Telsius Prime mining colony was a bolomite extraction facility on Telsius Prime. It had at least four levels, and used pulse drills.
In 2376, Dala and Mobar, posing as Kathryn Janeway and Tuvok, conned the miners of the Telsius Prime mining colony out of ten kilotons of bolomite. (VOY: "Live Fast and Prosper")