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α Gruis (Latinised to Alpha Gruis) is the star's Bayer designation. (Its first depiction in a celestial atlas was in Johann Bayer's Uranometria of 1603. [14]) It bore the traditional name Alnair or Al Nair (sometimes Al Na'ir in lists of stars used by navigators), [15] from the Arabic al-nayyir "the bright one", itself derived from its Arabic name, al-nayyir min dhanab al-ḥūt (al-janūbiyy ...
Follows the same paths as many of the other stars in Grus, for example Gamma and Alpha Gruis in history and mythology. See also. List of stars in Grus;
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The constellation's brightest star, Alpha Gruis, is also known as Alnair and appears as a 1.7-magnitude blue-white star. Beta Gruis is a red giant variable star with a magnitude of 2.3 to 2.0. Six star systems have been found to have planets : the red dwarf Gliese 832 is one of the closest stars to Earth that has a planetary system.
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Alpha Ophiuchi: Binary star system 2.08 Beta Ursae Minoris: Star 2.10 [7] Gamma Andromedae: Quadruple star system 2.11 2.0 Beta Gruis: Star 2.12 Algol: Triple star system Maximum brightness 2.14 2.115 Denebola: Star 2.17 Gamma Centauri: Binary star system 2.21 2.14 Lambda Velorum: Star 2.23 Gamma Cygni: Star Suspected variable star 2.23 Alpha ...
It has around 3 times the mass and 135 times the diameter of the Sun. [22] Mu Gruis, composed of Mu 1 and Mu 2, is also an optical double—both stars are yellow giants of spectral type G8III around 2.5 times as massive as the Sun with surface temperatures of around 4900 K. [24] Mu 1 is the brighter of the two at magnitude 4.8 located around ...