Английская Википедия:HD 170469
Шаблон:Short description Шаблон:Starbox begin Шаблон:Starbox observe Шаблон:Starbox character Шаблон:Starbox astrometry Шаблон:Starbox orbit Шаблон:Starbox detail Шаблон:Starbox catalog Шаблон:Starbox reference Шаблон:End
HD 170469 is a probable binary star[1][2] system in the equatorial constellation of Ophiuchus. It is too faint to be viewed with the naked eye, having an apparent visual magnitude of 8.21.[3] The system is located at a distance of 197 light years away from the Sun based on parallax. It is drifting closer with a radial velocity of −59 km/s,[4] and is expected to come to within Шаблон:Convert in about 959,000 years.
The primary, component A, is a G-type main-sequence star with a stellar classification of G5V,[4] indicating it is generating energy through core hydrogen fusion. Estimates of the star's age range from five[3] to almost nine[5] billion years. It has 1.10 times the mass of the Sun and 1.24 times the Sun's radius.[6] The star has a higher than solar metallicity.[4] It is radiating 1.64[7] times the Sun's luminosity from its photosphere at an effective temperature of 5,786 K.[4]
The secondary companion, component B, is located at an angular separation of Шаблон:Val along a position angle of Шаблон:Val from the primary, as of 2018.[4] Initially it was thought to be a red dwarf of spectral class M1,[2] but was later determined to be a K-type main-sequence star with a class of K5V.[4] This star lies at a projected separation of Шаблон:Val[2] from the primary, and is orbiting with an estimated period of around 114,000 years.[1]
Planetary system
In 2007, a planet was discovered by the N2K Consortium, led by principal investigators Debra Fischer and Gregory P. Laughlin.[8] It was spotted using the radial velocity method, and was independently confirmed in 2014.[2]
Шаблон:OrbitboxPlanet begin Шаблон:OrbitboxPlanet Шаблон:Orbitbox end
See also
References
- ↑ 1,0 1,1 Ошибка цитирования Неверный тег
<ref>; для сносокtokovinin2014не указан текст - ↑ 2,0 2,1 2,2 2,3 Ошибка цитирования Неверный тег
<ref>; для сносокMugrauer2014не указан текст - ↑ 3,0 3,1 Ошибка цитирования Неверный тег
<ref>; для сносокAnderson2012не указан текст - ↑ 4,0 4,1 4,2 4,3 4,4 4,5 Ошибка цитирования Неверный тег
<ref>; для сносокMontes2018не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>; для сносокBonfanti2015не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>; для сносокstassun2017не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>; для сносокGaiaDR2не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>; для сносокFischer2007не указан текст
- Английская Википедия
- G-type main-sequence stars
- K-type main-sequence stars
- Binary stars
- Planetary systems with one confirmed planet
- Ophiuchus
- Durchmusterung objects
- Henry Draper Catalogue objects
- Hipparcos objects
- 2MASS objects
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- Википедия
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