Beta Penthe system was a Klingon star system in Sector 21166. This system consisted of the primary Beta Penthe, six planets, and the planetoid Rura Penthe. Rura Penthe was the location for 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)