Английская Википедия:Eta Lupi
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
External links
- ↑ 1,0 1,1 1,2 Ошибка цитирования Неверный тег
<ref>; для сносокEggleton2008не указан текст - ↑ 2,0 2,1 2,2 2,3 2,4 Ошибка цитирования Неверный тег
<ref>; для сносокTokovinin2008не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>; для сносокNicolet1978не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>; для сносокvanLeeuwen2007не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>; для сносокKouwenhoven2007не указан текст - ↑ 6,0 6,1 Ошибка цитирования Неверный тег
<ref>; для сносокWDSC2014не указан текст
- Английская Википедия
- B-type subgiants
- Triple star systems
- Lupus (constellation)
- Bayer objects
- Hipparcos objects
- Bright Star Catalogue objects
- Durchmusterung objects
- Henry Draper Catalogue objects
- Ap stars
- Upper Centaurus Lupus
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- Страницы с телепортом
- Википедия
- Статья из Википедии
- Статья из Английской Википедии
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