Английская Википедия:Eta Lupi

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Версия от 19:57, 4 марта 2024; EducationBot (обсуждение | вклад) (Новая страница: «{{Английская Википедия/Панель перехода}} {{short description|Probable triple star system in the constellation of Lupus}} {{Starbox begin | name = η Lupi }} {{Starbox observe | epoch = J2000.0 | equinox = J2000.0 (ICRS) | constell = Lupus | ra = {{RA|16|00|07.32786}}<ref name=vanLeeuwen2007/> | dec = {{DEC|−38|23|48.1513}}<ref name=vanLeeuw...»)
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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 η Lupi, often Latinised as Eta Lupi, is a probable triple star[1][2] system in the southern constellation of Lupus. It is visible to the naked eye with an apparent visual magnitude of 3.41.[3] Based upon an annual parallax shift of 27.80[4] mas as seen from Earth, it is located around Шаблон:Convert distant from the Sun. It is a member of the Upper Centaurus–Lupus subgroup of the nearby Sco OB2 association.[5]

The inner pair in this triple system has an estimated orbital period of around 27,000 years.[2] As of 2013, they had an angular separation of 15.0 arc seconds along a position angle of 19°.[6] The primary star, component A, is an evolving A-type subgiant star with a stellar classification of B2 IV.[1] It has used up the supply of hydrogen at its core and has begun to expand off the main-sequence.

The secondary, component B, is a chemically peculiar A-type main sequence star with a class of A5 Vp[1] and an estimated mass 2.10 times that of the Sun.[2] The outer member, component C, has an orbital period of around half a million years.[2] As of 2007, it had an angular separation of 115.8 arc seconds along a position angle of 248° from the primary.[6] It is an F-type main sequence star with a classification of F5 V and an estimated 1.29 times the Sun's mass.[2]

References

Шаблон:Reflist

External links

Шаблон:Stars of Lupus

  1. 1,0 1,1 1,2 Ошибка цитирования Неверный тег <ref>; для сносок Eggleton2008 не указан текст
  2. 2,0 2,1 2,2 2,3 2,4 Ошибка цитирования Неверный тег <ref>; для сносок Tokovinin2008 не указан текст
  3. Ошибка цитирования Неверный тег <ref>; для сносок Nicolet1978 не указан текст
  4. Ошибка цитирования Неверный тег <ref>; для сносок vanLeeuwen2007 не указан текст
  5. Ошибка цитирования Неверный тег <ref>; для сносок Kouwenhoven2007 не указан текст
  6. 6,0 6,1 Ошибка цитирования Неверный тег <ref>; для сносок WDSC2014 не указан текст