Английская Википедия:HD 4308
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
HD 4308 is a single[1] star with an orbiting exoplanet in the southern constellation of Tucana.[2] It has a yellow hue and is a challenge to view with the naked eye even under good seeing conditions, having an apparent visual magnitude of 6.54.[1] This object is located at a distance of 72 light years, as determined from parallax measurements. It is a population II star[1] and is considered to be a member of the thick disk.[3] The star is receding from the Sun with a radial velocity of +95 km/s.[4]
This is a Sun-like G-type main-sequence star with a stellar classification of G6VFe-0.9,[5] where the suffix notation indicates an underabundance of iron in the spectrum. The age of the star is poorly constrained, with estimated ranging from 1.6[6] billion years up to 10 billion.[7] It has 95% of the mass of the Sun but 104% of the Sun's radius. The star is radiating nearly the same luminosity as the Sun from its photosphere at an effective temperature of 5,714 K.[6]
Planetary system
In 2005, a low-mass planet was found in orbit around this star using the radial velocity method with the HARPS spectrograph. It is following a circular orbit close to its host star with a period of just 15.6 days. Unusual for a star with planets, HD 4308 has a metallicity lower than that of the Sun.[8]
Шаблон:OrbitboxPlanet begin Шаблон:OrbitboxPlanet Шаблон:Orbitbox end
See also
References
External links
- ↑ 1,0 1,1 1,2 Ошибка цитирования Неверный тег
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; для сносокSIMBAD
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- Английская Википедия
- G-type main-sequence stars
- Planetary systems with one confirmed planet
- Tucana (constellation)
- Durchmusterung objects
- Gliese and GJ objects
- Henry Draper Catalogue objects
- Hipparcos objects
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