Imaga was a star system located in the Risa sector of the Sirius sector block, near the Briar Patch in the galaxy's Beta Quadrant. Imaga was the location of a planetary system. In the Federation-Klingon war of the 2400s, the Klingons had a base on a planet in this system. They stockpiled deadly weapons there, and also kept a doomsday machine in the system. (STO mission: "The Doomsday Device")