The planet had a mass of 5.972 × 1024 kg and an O2/N2atmosphere. Its surface was dominated by vast savannas and deserts with little surface water. It was inhabited by isolated pockets of Kolarans, an early industrial humanoid civilization.
The topographical map of an area of Kolarus III, which was used by Data for locating the components of B-4, was based on a map of the Hadley-Apennine region of Luna. This was the landing site for Apollo 15. (Star Trek Encyclopedia (4th ed., vol. 1, p. 435))