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Words near each other
・ Gliese 682
・ Gliese 682 c
・ Gliese 687
・ Gliese 69
・ Gliese 693
・ Gliese 710
・ Gliese 752
・ Gliese 754
・ Gliese 758
・ Gliese 758 B
・ Gliese 777
・ Gliese 777 b
・ Gliese 777 c
・ Gliese 784
・ Gliese 806
Gliese 809
・ Gliese 829
・ Gliese 832
・ Gliese 832 b
・ Gliese 832 c
・ Gliese 849
・ Gliese 849 b
・ Gliese 86
・ Gliese 86 b
・ Gliese 876
・ Gliese 876 b
・ Gliese 876 c
・ Gliese 876 d
・ Gliese 876 e
・ Gliese 880


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Gliese 809 : ウィキペディア英語版
Gliese 809


Gliese 809 is a red dwarf star in the constellation Cepheus,〔 forming the primary component of a multi-star system. A visual magnitude of 8.55 makes it too faint to see with the naked eye. It is part of the Gliese Catalogue of Nearby Stars and is located about 23 light-years (ly) from the Solar System. Gliese 809 has about 70.5%〔 the radius of the Sun and 61.4%〔 of the Sun's mass. It has a metallicity of −0.06, which means that the abundance of elements other than hydrogen and helium is just 87.1% that of the Sun.〔
This is a high proper motion star that moves about 0.77 arcseconds per year relative to background stars.〔 In physical terms it is travelling with a space velocity of 31.1 km/s relative to the Solar System.〔 The galactic orbit of this star carries it 21,300 ly from the Galactic Center at its perigee to 30,600 ly at its apogee. The orbital eccentricity is 17.8% with the semi-major axis of 25,956 ly and a semi-minor axis of 25,542 ly.〔
== See also ==

*List of nearest stars and brown dwarfs

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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