Pentarus was the primary for the Pentarus planetary system. Pentarus V was colonized by salenite miners. This planet, and Pentarus II, were classified as M class planets. Likewise, four moons in this system were capable of supporting life. One of these moons, Lambda Paz, was a satellite of Pentarus III. (TNG: "Final Mission")

Pentarus appeared in the starchart Data and Picard were studying in Stellar Cartography in 2371. (Star Trek Generations, display graphic)