Английская Википедия:Gliese 754

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Версия от 19:51, 14 марта 2024; EducationBot (обсуждение | вклад) (Новая страница: «{{Английская Википедия/Панель перехода}} {{Short description|Star in the constellation of Telescopium}} {{Starbox begin}} {{Sky|19|20|47.98349|-|45|33|29.6292|19.272}} {{Starbox observe | epoch = J2000.0 | constell = Telescopium | ra = {{RA|19|20|47.98349}}<ref name=GaiaDR2/> | dec = {{DEC|−45|33|29.6292}}<ref name=GaiaDR2/> | appmag_v = 12.25<ref name=Henry_et_al_2018/> }} {{Starbox ch...»)
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Gliese 754 is a dim star in the southern constellation of Telescopium. It has an apparent visual magnitude of 12.25,[1] which requires a telescope to view. The star is located at a distance of 19.3 light-years from the Sun based on parallax,[2] and it is drifting further away with a radial velocity of +7 km/s.[3] It is one of the hundred closest stars to the Solar System. Calculations of its orbit around the Milky Way showed that it is eccentric, and indicate that it might be a thick disk object.[4]

The stellar classification of Gliese 754 is M4V,[1] indicating that this is a small red dwarf star on the core hydrogen fusing main sequence. It has 17% of the mass of the Sun and 21% of the Sun's radius.[3] The star is fully convective and is a source of X-ray emission.[5] It is rotating slowly with a period of about 133 days.[3] The metallicity is sub-solar,[6] indicating it has a lower abundance of heavy elements compared to the Sun. It is radiating just 0.5%[7] of the luminosity of the Sun from its photosphere at an effective temperature of around 3,202 K.[6]

Planetary System

In June 2019, a candidate exoplanet was reported in orbit around Gliese 754. It was detected using the Doppler method and is orbiting at a distance of Шаблон:Val with a period of 78 days. The orbit is essentially circular, to within the margin of error.[8] The habitable zone for this star ranges from Шаблон:Val to Шаблон:Val;[7] inside the orbit of this proposed companion.

Шаблон:OrbitboxPlanet begin Шаблон:OrbitboxPlanet hypothetical Шаблон:Orbitbox end

References

Шаблон:Reflist

Шаблон:Nearest star systems Шаблон:Stars of Telescopium

  1. 1,0 1,1 Ошибка цитирования Неверный тег <ref>; для сносок Henry_et_al_2018 не указан текст
  2. Ошибка цитирования Неверный тег <ref>; для сносок GaiaDR2 не указан текст
  3. 3,0 3,1 3,2 Ошибка цитирования Неверный тег <ref>; для сносок Newton_et_al_2018 не указан текст
  4. Ошибка цитирования Неверный тег <ref>; для сносок Innanen_Flynn_2010 не указан текст
  5. Ошибка цитирования Неверный тег <ref>; для сносок Wright2018 не указан текст
  6. 6,0 6,1 Ошибка цитирования Неверный тег <ref>; для сносок Houdebine_et_al_2016 не указан текст
  7. 7,0 7,1 Ошибка цитирования Неверный тег <ref>; для сносок Mayor_et_al_2009 не указан текст
  8. Ошибка цитирования Неверный тег <ref>; для сносок Barnes_et_al_2019 не указан текст