Beta Penthe system was a Klingon planetary system in Sector 21166, in the Beta Quadrant. This system consisted of the primary Beta Penthe, six planets, and the planetoid Rura Penthe. Rura Penthe was the location of a penal colony. The stellar index number for Beta Penthe was 934-83294.
In 2293, the location of Beta Penthe was labeled in the star chart for the "Operation Retrieve" command briefing. The system map of Beta Penthe was included in the plans for Operation Retrieve. Both the star chart and map were seen in the office of the Federation President on Earth. (Star Trek VI: The Undiscovered Country set artwork)