Gamma Hydra IV

Gamma Hydra IV is a planet. Johnson City is a location there. The inhabitants of the planet were irradiated by a rogue comet in 2267. (TOS episode: "The Deadly Years", DS9 novel: "The 34th Rule")

In 2372, Odo disguised himself as a container bound to Gamma Hydra IV carrying Bajoran Muriniri dolls. (DS9 novel: "The 34th Rule")