Bartha IX was a independent planet, presumably proximate to planet Sigma V. In 2376, Ardack Sprachnee plotted to steal the treasury of Sigma V and secretly transfer it to Bartha IX. As part of this plan, he arranged to have a number of convicted criminals from Sigma V, including himself, transported to Bartha IX aboard a Mark 17 hauler-class ship. Sprachnee was arrested after arriving at Bartha IX by Starfleet, and his fellow prisoners presumably returned to Sigma V. (SCE eBook: Identity Crisis)