Jaros II

Jaros II was a Federation planet, the site of a Starfleet stockade.

Ensign Ro Laren was imprisoned at Jaros II stockade following her court martial resulting from the events at Garon II sometime in the mid 2360s. She was held there until her release in 2368. 

In 2372, Geordi La Forge compared Admiral Jeremiah Hayes's plans to have him transferred off the USS Enterprise (NCC-1701-E) to being "transferred" to Jaros II. (: The Insolence of Office)