Malcor III was the inhabited third planet in its star system. This planet's day lasted 29 hours. The nearest star system to Malcor III was the Garth system. Located over 2,000 light years from Earth, this was the homeworld for the Malcorians, a humanoid species. The planet was headed by a chancellor.
In 2367, the planet made first contact with the Federation prematurely when William T. Riker, on a mission to investigate the species, was revealed as an alien. Avel Durken was the planet's chancellor at this time. (TNG: "First Contact")