Английская Википедия:HD 77338
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 77338 is a star with a close orbiting exoplanet companion in the southern constellation of Pyxis. It is too dim to be visible with the naked eye, having an apparent visual magnitude of 8.63.[1] The system is located at a distance of 149 light years, and it is drifting further away with a heliocentric radial velocity of 8.2 km/s.[2]
The spectrum of this star presents as a K-type subgiant with a stellar classification of K0 IV.[3] This indicates the star has exhausted the supply of hydrogen at its core and has begun to evolve away from the main sequence. It has 94%[4] of the mass of the Sun and 97% of the Sun's girth.[5] The star is spinning with a rotation period of roughly 33 days.[6] It is radiating 71% of the luminosity of the Sun from its photosphere at an effective temperature of 5,315 K.[4]
HD 77338 is enriched in its concentration of elements more massive than helium compared to the Sun, with a metallicity of 0.16,[5] but is much older at an age of 9.5 billion years.[4] It is unusually enriched in heavy elements for a star of its age. The anomalously high abundance of ions of manganese may indicate the star has recently passed through the common shell stage (engulfed a planet).[7]
Planetary system
In 2012, a planet, named HD 77338b, was discovered by the radial velocity method on a tight orbit with uncertain eccentricity.[8] Its equilibrium temperature is 954.8 K.[9]
Шаблон:OrbitboxPlanet begin Шаблон:OrbitboxPlanet Шаблон:Orbitbox end
References
Шаблон:Sky Шаблон:Stars of Pyxis
- ↑ Ошибка цитирования Неверный тег
<ref>; для сносокAnderson_Francis_2012не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>; для сносокEDR3не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>; для сносокhouk_smith-moore_1978не указан текст - ↑ 4,0 4,1 4,2 Ошибка цитирования Неверный тег
<ref>; для сносокPavlenko2018не указан текст - ↑ 5,0 5,1 Ошибка цитирования Неверный тег
<ref>; для сносокStassun_et_al_2016не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>; для сносокSuárez_et_al_2015не указан текст - ↑ Шаблон:Citation
- ↑ Ошибка цитирования Неверный тег
<ref>; для сносокJenkins2012не указан текст - ↑ HD 77338 b is an exoplanet orbiting the star HD 77338, located about 149.3 light-years (45.8 pc) away from Solar System. Its discovery was publicly announced on 2012
- Английская Википедия
- K-type subgiants
- Planetary systems with one confirmed planet
- Pyxis
- 2MASS objects
- Durchmusterung objects
- Henry Draper Catalogue objects
- Hipparcos objects
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- Страницы с телепортом
- Википедия
- Статья из Википедии
- Статья из Английской Википедии
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