Alpha Centauri

Alpha Centauri is a trinary star system consisting of the three companion stars Rigil Kentaurus, Quindar and Proxima. At a little over four light years distant, this is the closest star system to Earth in the Sol system. By the 24th century, the system's three inhabited planets and various space stations and outposts supported a population of over 21 billion sentient individuals. (Reference books: Star Fleet Technical Manual, The Worlds of the Federation; TOS novels: "Crisis on Centaurus", "Time for Yesterday")

The Federation worlds here are sometimes also referred to simply as Alpha Centauri. This system houses a base center for Starfleet Intelligence's NW Intelligence sector. (Reference book: Starfleet Intelligence Manual)

Star system

 * Rigil Kentaurus (A) and Quindar (B), binary pair
 * Alpha Centauri I
 * Alpha Centauri II (Behemoth)
 * Alpha Centauri III
 * one moon
 * Alpha Centauri IV (Centaurus)
 * Alpha Centauri V
 * two moons
 * Alpha Centauri VI
 * eight moons
 * Alpha Centauri VII (Al Rijil, the Alpha Centauri planet)
 * Proxima (C), third star component