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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 ...
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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 ...
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.
Alnair (Alpha Gruis) and Tiaki (Beta Gruis) are bright stars in this constellation that were possibly never seen in the Chinese sky. The name of the western constellation in modern Chinese is 天鶴座 ( tiān hè zuò ), meaning "the heaven crane constellation".
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