The Teplan system was a star system located in the Gamma Quadrant, between the Jenkata Nebula and the Kendi system. It held a single star, a blue-white A-class star with a brightness of magnitude +3 (ST reference: Star Charts).
The system held the homeworld of the Teplan race (DS9 episode: "The Quickening", (Decipher RPG module: Through a Glass, Darkly).