Английская Википедия:HD 171028
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 171028 is a star with an exoplanet companion in the equatorial constellation of Ophiuchus. With an apparent visual magnitude of 8.3,[1] it is too faint to be readily visible with the naked eye. Unlike most planet-harboring stars, it does not have a Hipparcos number. The star is located at a distance of approximately 365 light years from the Sun based on parallax, and is drifting further away with a radial velocity of +13.5 km/s.[2]
This is a yellow-hued G-type star of unknown luminosity class with a stellar classification of G0.[3] It is a metal-poor star belonging to the thin disk population.[4] HD 171028 is estimated to be nearly five billion years old and is spinning with a projected rotational velocity of 2.3 km/s.[3] It has the same mass as the Sun, but the radius is 2.4 times larger. The star is radiating 5.4[2] times the luminosity of the Sun from its photosphere at an effective temperature of 5,671 K.[1]
In the summer of 2007, a Jovian planetary companion was discovered by the HARPS planet search program using the radial velocity method.[3] This object is orbiting at a distance of Шаблон:Val from the host star with a period of Шаблон:Convert and an eccentricity (ovalness) of 0.59. Since the inclination of the orbit is unknown, only a minimum mass can be determined. This planet has at least double the mass of Jupiter.[5]
Шаблон:OrbitboxPlanet begin Шаблон:OrbitboxPlanet Шаблон:Orbitbox end
See also
References
Шаблон:Sky Шаблон:Stars of Ophiuchus
- ↑ 1,0 1,1 Ошибка цитирования Неверный тег
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; для сносокGaia DR2
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; для сносокSantos2007
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; для сносокHaywood2008
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- Английская Википедия
- G-type stars
- Planetary systems with one confirmed planet
- Ophiuchus
- Durchmusterung objects
- Henry Draper Catalogue objects
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