Gamma Hydra

Gamma Hydra (or Gamma Hydrae) was a star in the Gamma Hydra sector of Federation space, near the Romulan Neutral Zone. The Gamma Hydra system had at least four planets. The comet Icarus IV also orbited Gamma Hydra. 

The USS Enterprise (NCC-1701) visited the Gamma Hydra system en route to Starbase 10 in 2267. 

The Gamma Hydra system was also the initial destination of the Enterprise during Saavik's Kobayashi Maru test while at Starfleet Academy. 

Following the apparent disappearance of the USS da Vinci in 2377, Captain David Gold attempted to take the Shuttlecraft Shirley to Gamma Hydra, but after shaking a pursuer by creating a wormhole, instead ended up at Galorndon Core.