Rigil Kentaurus (also known as Alpha Centauri A or Al Rijil) is the most prominent of the three stars in the Alpha Centauri star system. Rigil is locked in orbit with Quindar, and is orbited by several planets as well as the system's third star, Proxima. (ST references: Star Fleet Technical Manual, Spaceflight Chronology; FASA RPG module: Star Fleet Intelligence Manual; TOS novel: Time for Yesterday)