Английская Википедия:HD 90156
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 90156 is a star with an orbiting exoplanet in the constellation Hydra. Based on parallax measurements, it is located at a distance of 71.6 light years from the Sun.[1] The system is drifting further away with a heliocentric radial velocity of 27 km/s.[2] The apparent visual magnitude of this star is 6.92,[3] which is places it near the lower limit of visibility to the naked eye. A survey in 2015 ruled out the existence of any stellar companions at projected distances above Шаблон:Val.[4]
This star was designated as Gamma Antliae by Lacaille, and Gould intended to keep it in the Antlia constellation. However, the delineating of constellation boundaries in 1930 saw it transferred to Hydra.[5]
The spectrum of HD 90156 presents as a G-type main-sequence star with a stellar classification of G5 V[6] It is rotating slowly with a projected rotational velocity of 0.817,[7] and it only displays a low level of magnetic activity in its chromosphere. The metallicity of the star is lower than in the Sun, indicating a paucity of elements with mass greater than helium.[8] The star has 84% of the mass of the Sun and 88% of the Sun's radius. It is radiating 74%[9] of the Sun's luminosity from its photosphere at an effective temperature of 5,599 km/s.[8]
Planetary system
In 2011, an exoplanet was found in an eccentric orbit around the host star using Doppler spectroscopy. As the inclination of its orbital plane is unknown, only a lower bound on its mass can be determined. It has at least 18 times the mass of the Earth. The exoplanet is orbiting its host star with a separation of Шаблон:Val and a period of 50 days.[8]
Шаблон:OrbitboxPlanet begin Шаблон:OrbitboxPlanet Шаблон:Orbitbox end
See also
References
Шаблон:Sky Шаблон:Stars of Hydra
- ↑ Ошибка цитирования Неверный тег
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<ref>; для сносокAnderson_Francis_2012не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>; для сносокMugrauer_Ginski_2015не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>; для сносокWagman2003не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>; для сносокGray_et_al_2006не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>; для сносокCosta_Silva_et_al_2020не указан текст - ↑ 8,0 8,1 8,2 Ошибка цитирования Неверный тег
<ref>; для сносокMordasini2011не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>; для сносокBonfanti_et_al_2016не указан текст
- Английская Википедия
- G-type main-sequence stars
- Planetary systems with one confirmed planet
- Hydra (constellation)
- Durchmusterung objects
- Gliese and GJ objects
- Henry Draper Catalogue objects
- Hipparcos objects
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- Страницы с телепортом
- Википедия
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