The Bayer designation Xi Centauri (ξ Cen / ξ Centauri) is shared by two star systems, in the constellation Centaurus:
They are separated by 0.66° on the sky.
Graffias ("claws") is a traditional name for several stars in the constellations between Scorpius and Libra.
The Bayer designation Xi Sagittarii (ξ Sagittarii) is shared by two stars, ξ1 Sagittarii and ξ² Sagittarii, in the constellation Sagittarius, separated by 0.46° in the sky. Because they are close to the ecliptic, they can be occulted by the Moon and, very rarely, by planets. The last occultation of ξ² Sagittarii by a planet took place on 22 December 1810, when it was occulted by Venus.
Gamma Centauri, Latinized from γ Centauri, is a binary star system in the southern constellation of Centaurus. It has the proper name Muhlifain, not to be confused with Muliphein, which is γ Canis Majoris; both names derive from the same Arabic root. The system is visible to the naked eye as a single point of light with a combined apparent visual magnitude of +2.17; individually they are third-magnitude stars.
Zeta Centauri, Latinized from ζ Centauri, is a binary star system in the southern constellation of Centaurus. It has the proper name Alnair, from the Arabic Nayyir Baṭan Qanṭūris, meaning "The Bright (Star) of the Body of the Centaur". With a combined apparent visual magnitude of +2.55, it is one of the brighter members of the constellation. This system is close enough to the Earth that its distance can be measured directly using the parallax technique. This yields a value of roughly 382 light-years, with a 1.6% margin of error. It is drifting further away with a radial velocity of +6.5 km/s.
Alpha Centauri is a star system and the collective name of three stars in that system. The individual stars are named Alpha Centauri A, Alpha Centauri B, and Proxima Centauri.
The Bayer designation Xi Canis Majoris is shared by two star systems, in the constellation Canis Major:
The Bayer designation Xi Capricorni is shared by two star systems, in the constellation Capricornus:
The Bayer designation Upsilon Centauri is shared by two star systems, in the constellation Centaurus:
The Bayer designations c Centauri and C Centauri are distinct.
Xi2 Centauri, Latinized from ξ2 Centauri, is a triple star system in the southern constellation of Centaurus. It is visible to the naked eye with an apparent visual magnitude of 4.30, and forms a wide optical double with the slightly dimmer ξ1 Centauri. Based upon an annual parallax shift of 6.98 mas, Xi2 Centauri lies roughly 470 light years from the Sun. At that distance, the visual magnitude is diminished by an interstellar extinction factor of 0.32 due to intervening dust.
The Bayer designation Omicron Centauri is shared by two star systems, in the constellation Centaurus:
The designations W Centauri and w Centauri refer to two different stars in the constellation Centaurus.
The Bayer designations A Centauri and a Centauri represent different stars. Due to technical limitations, both designations link here.
In mathematics, the Ξ function may refer to:
The Bayer designation Xi Ceti is shared by two star systems, in the constellation Cetus:
The designations U Centauri and u Centauri refer to two different stars in the constellation Centaurus.
x Centauri can refer to two different stars:
The Bayer designations g Carinae and G Carinae refer to separate stars:
The Bayer designation ξ Lupi is shared by two star systems in the constellation Lupus:
The Bayer designations b Centauri and B Centauri are distinct. Due to technical limitations, both designations link here. For the star