Английская Википедия:Eta Ophiuchi
Шаблон:Short description Шаблон:Starbox begin Шаблон:Starbox image Шаблон:Starbox observe Шаблон:Starbox character Шаблон:Starbox astrometry Шаблон:Starbox orbit Шаблон:Starbox detail Шаблон:Starbox detail Шаблон:Starbox detail Шаблон:Starbox catalog Шаблон:Starbox reference Шаблон:Starbox end Eta Ophiuchi (η Ophiuchi, abbreviated Eta Oph, η Oph) is a binary star in the constellation of Ophiuchus. Based on parallax measurements taken during the Hipparcos mission, it is approximately 88 light-years from the Sun.
Eta Ophiuchi is part of a multiple star system designated WDS J17104-1544. It itself is designated WDS J17104-1544AB and its two components WDS J17104-1544A (also called Sabik Шаблон:IPAc-en, the traditional name for the system)[1][2] and WDS J17104-1544B. The 'C' component is UCAC4 372-080717[3] and 'D' is UCAC2 26022336.[4]
Nomenclature
η Ophiuchi (Latinised to Eta Ophiuchi) is the system's Bayer designation. WDS J17104-1544AB is its designation in the Washington Double Star Catalog. The designations of the two components as WDS J17104-1544 A and B derive from the convention used by the Washington Multiplicity Catalog (WMC) for multiple star systems, and adopted by the International Astronomical Union (IAU).[5]
It bore the traditional name Sabik, from the Arabic السابق al-sābiq "the preceding one", of uncertain reference.[1] In 2016, the International Astronomical Union organized a Working Group on Star Names (WGSN)[6] to catalogue and standardize proper names for stars. The WGSN approved the name Sabik for the component WDS J17104-1544 A on 21 August 2016 and it is now so included in the List of IAU-approved Star Names.[2]
In Chinese, this star is considered part of Шаблон:Lang (Шаблон:Lang), meaning Left Wall of Heavenly Market Enclosure, which refers to an asterism representing eleven old states in China that mark the left borderline of the enclosure, consisting of Eta Ophiuchi, Delta Herculis, Lambda Herculis, Mu Herculis, Omicron Herculis, 112 Herculis, Zeta Aquilae, Theta¹ Serpentis, Eta Serpentis, Nu Ophiuchi and Xi Serpentis.[7] Consequently, the Chinese name for Eta Ophiuchi itself is Шаблон:Lang (Шаблон:Lang, Шаблон:Lang-en), representing the state Song (宋).[8][9]
Namesake
USS Sabik (AK-121) was a United States Navy Crater class cargo ship named after the star.
Properties
Eta Ophiuchi is a binary system that is difficult to resolve in amateur telescopes but whose true nature was determined through use of more advanced techniques. The primary star (whose observational data make up the table in this article) is actually only slightly larger and hotter than its companion. Individually each star is a fairly unremarkable A class main sequence star, but as a binary pair they are unusual. Each star orbits around a common center in a close and highly elliptical orbit, making planetary formation unlikely in this system and some stellar data imprecise.Шаблон:Citation needed
References
- ↑ 1,0 1,1 Шаблон:Cite book
- ↑ 2,0 2,1 Шаблон:Cite web
- ↑ Шаблон:Citation
- ↑ Шаблон:Citation
- ↑ Шаблон:Cite arXiv
- ↑ Шаблон:Citation
- ↑ Шаблон:In lang 中國星座神話, written by 陳久金. Published by 台灣書房出版有限公司, 2005, Шаблон:ISBN.
- ↑ Шаблон:In lang 香港太空館 - 研究資源 - 亮星中英對照表 Шаблон:Webarchive, Hong Kong Space Museum. Accessed on line November 23, 2010.
- ↑ Шаблон:In lang English-Chinese Glossary of Chinese Star Regions, Asterisms and Star Name Шаблон:Webarchive, Hong Kong Space Museum. Accessed on line November 23, 2010.
- Английская Википедия
- Bayer objects
- Binary stars
- Flamsteed objects
- Henry Draper Catalogue objects
- Hipparcos objects
- Ophiuchus
- A-type subgiants
- Bright Star Catalogue objects
- Durchmusterung objects
- Gliese and GJ objects
- Страницы, где используется шаблон "Навигационная таблица/Телепорт"
- Страницы с телепортом
- Википедия
- Статья из Википедии
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