Английская Википедия:HD 168443
Шаблон:Short description Шаблон:Starbox begin Шаблон:Starbox observe Шаблон:Starbox character Шаблон:Starbox astrometry Шаблон:Starbox detail Шаблон:Starbox catalogue Шаблон:Starbox reference Шаблон:Starbox end
HD 168443 is an ordinary yellow-hued star in the Serpens Cauda segment of the equatorial constellation of Serpens. It is known to have two substellar companions. With an apparent visual magnitude of 6.92,[1] the star lies just below the nominal lower brightness limit of visibility to the normal human eye. This system is located at a distance of 127 light years from the Sun based on parallax,[2] but is drifting closer with a radial velocity of −48.7 km/s.[1]
This stellar object is a core hydrogen fusing G-type main-sequence star with a classification of G6V, although it is likely evolved[3] with an age of around 11 billion years.[1] It is slightly lower in mass than the Sun but has a radius that is larger by 51%. The star is spinning with a leisurely projected rotational velocity of 2.2 km/s[3] and it has a very inactive chromosphere.[4][3] It is radiating 2.4[5] times the luminosity of the Sun from its photosphere at an effective temperature of 5,491 K.[3]
Planetary system
HD 168443 is known to be orbited by a super-Jupiter exoplanet, discovered in 1999, and a brown dwarf, discovered in 2001. The brown dwarf takes 30 times longer to orbit the star than the planet.[6][7][8] Both have eccentric orbits.[3] An orbital fit to Hipparcos astrometric data suggested the brown dwarf has a mass of Шаблон:Val.[8] A 2022 study utilizing both Hipparcos and Gaia data instead measured a true mass of Шаблон:Jupiter mass for HD 168443 c, close to the minimum mass.[9] Test simulations of massless particles orbiting in between these two bodies show that all such objects are quickly ejected within two million years. That suggests any other planetary companions would be orbiting further out from the star.[10]
Шаблон:OrbitboxPlanet begin Шаблон:OrbitboxPlanet Шаблон:OrbitboxPlanet Шаблон:Orbitbox end
See also
- HD 38529
- List of exoplanets discovered before 2000 - HD 168443 b
- List of exoplanets discovered between 2000–2009 - HD 168443 c
References
External links
- ↑ 1,0 1,1 1,2 Ошибка цитирования Неверный тег
<ref>; для сносокAnderson_Francis_2012не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>; для сносокGaia DR3не указан текст - ↑ 3,0 3,1 3,2 3,3 3,4 Ошибка цитирования Неверный тег
<ref>; для сносокPilyavsky_et_al_2011не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>; для сносокGray_et_al_2006не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>; для сносокGaia DR2не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>; для сносокMarcy1999не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>; для сносокMarcy2001не указан текст - ↑ 8,0 8,1 Ошибка цитирования Неверный тег
<ref>; для сносокReffert2006не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>; для сносокFeng2022не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>; для сносокBarnes2004не указан текст
- Английская Википедия
- G-type main-sequence stars
- Brown dwarfs
- Planetary systems with two confirmed planets
- Serpens
- Durchmusterung objects
- Gliese and GJ objects
- Henry Draper Catalogue objects
- Hipparcos objects
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- Википедия
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