Английская Википедия:Gliese 809
Шаблон:Short description Шаблон:Starbox begin Шаблон:Starbox observe Шаблон:Starbox character Шаблон:Starbox astrometry Шаблон:Starbox detail Шаблон:Starbox catalog Шаблон:Starbox reference Шаблон:Starbox end Gliese 809 is a red dwarf star in the constellation Cepheus,[1] 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%[2] the radius of the Sun and 61.4%[3] 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.[3]
This is a high proper motion star that moves about 0.77 arcseconds per year relative to background stars.[4] In physical terms it is travelling with a space velocity of 31.1 km/s relative to the Solar System.[1] 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.[1]
See also
References
- ↑ 1,0 1,1 1,2 Ошибка цитирования Неверный тег
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- Английская Википедия
- Cepheus (constellation)
- M-type main-sequence stars
- Durchmusterung objects
- Henry Draper Catalogue objects
- Hipparcos objects
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