Jaros II
From Star Trek : Freedom's Wiki
Jaros II is a Federation planet and site of a Starfleet prison, known in Starfleet parlance as a "stockade."
Sometime in the mid-2360s, Ensign Ro Laren of the USS Wellington was court-martialed for disobeying direct orders on an away mission to Garon II. Her disobedience was alleged to have led to the deaths of eight of her crewmates. At her court martial, Ro refused to speak in her defense, and the court found her guilty. She was imprisoned in the stockade on Jaros II until her release in 2368. Her advice that same year was if sent to the Jaros II stockade that a room in the east wing was preferable to one on the west as the latter became "awfully hot in the afternoon." (TNG: "Ensign Ro").