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Locator logo showing the galaxy's Beta Quadrant.

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 in the galaxy's Beta Quadrant.

History and specifics

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)

In the Star Fleet Intelligence Manual, the star was referred to as "Al Rijil" (while the prominent planet, Centauri VII, was referred to as "Alpha Centauri"). In the Star Fleet Technical Manual, the earliest mention of this individual component of the Alpha Centauri system, it was referred to as "Rigil Kentaurus". "Alpha Centauri A" is a more scientific notation that was used in Time for Yesterday.



Alpha Centauri star system
Alpha Centauri A (primary)Alpha Centauri I • II. BehemothAlpha Centauri III (1 moon) • IV. Centaurus (2 moons) • Alpha Centauri V (2 moons) • Alpha Centauri VI (8 moons) • VII. Al RijilAlpha Centauri VIIIAlpha Centauri IXAlpha Centauri XAlpha Centauri XIAlpha Centauri XIIAlpha Centauri XIII

Alpha Centauri BOlson • II. New MontanaPerry • III. Lang • IV. Kent

Proxima CentauriProxima Centauri (Proxima Maintenance Yards) • Proxima Centauri IIProxima AlphaProxima Beta

Seal of the United Federation of Planets.
Centauran stars and star systems
Centauran home system (Alpha Centauri): Rigil Kentaurus (Alpha Centauri A)Quindar (Alpha Centauri B)Proxima (Alpha Centauri C) Federation icon image. the galaxy's Alpha and Beta Quadrants icon image. Centauran icon image. Centauran icon image.
Alpha Canus Majoris/Alpha CanarisArabennBeta RigaliaEgara 172KolitorIllexLaxes AlphaLeoxaLuris EtaMaven ParsisMegolarMinarcis AlphaMolinusMoxenalusOronessOsirisParsus IndiPillas MinoraPiramPrincipPrincipius MidosQuadrixRidixSestarci 124SingularitySiriusTarletus