Английская Википедия:Beta Gruis

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Beta Gruis (β Gruis, abbreviated Beta Gru, β Gru), formally named Tiaki Шаблон:IPAc-en,[1] is the second brightest star in the southern constellation of Grus. It was once considered the rear star in the tail of the constellation of the (Southern) Fish, Piscis Austrinus: it, with Alpha, Delta, Theta, Iota, and Lambda Gruis, belonged to Piscis Austrinus in medieval Arabic astronomy.[2]

Nomenclature

β Gruis (Latinised to Beta Gruis) is the star's Bayer designation.

It bore the traditional Tuamotuan name of Tiaki.[3] In 2016, the IAU organized a Working Group on Star Names (WGSN)[4] to catalog and standardize proper names for stars. The WGSN approved the name Tiaki for this star on 5 September 2017 and it is now so included in the List of IAU-approved Star Names.[1]

In Chinese, Шаблон:Lang (Шаблон:Lang), meaning Crane, refers to an asterism consisting of Beta Gruis, Alpha Gruis, Epsilon Gruis, Eta Gruis, Delta Tucanae, Zeta Gruis, Iota Gruis, Theta Gruis, Delta² Gruis and Mu¹ Gruis.[5] Consequently, Beta Gruis itself is known as Шаблон:Lang (Шаблон:Lang, Шаблон:Lang-en).[6] The Chinese name gave rise to another English name, Ke.[7]

Properties

Файл:BetaGruLightCurve.png
A visual band light curve for Beta Gruis, plotted from data published by Otero and Moon (2006).[8] The inset plot shows the points plotted in red with an expanded scale.

This is a red giant star[8] on the asymptotic giant branch[9] with an estimated mass of about 2.4 times that of the Sun and a surface temperature of approximately 3,480 K,[10] just over half the surface temperature of the Sun. This low temperature accounts for the dull red color of an M-type star. The total luminosity is about 2,500 times that of the Sun, and it has estimated 180 times the Sun's radius.[11]

Beta Gruis is a semiregular variable (SRb) star that varies in magnitude by about 0.4. It varies between intervals when it displays regular changes with a 37-day periodicity and times when it undergoes slow irregular variability.[8] Шаблон:Clear left

References

Шаблон:Reflist

External links

Шаблон:Stars of Grus

Шаблон:Authority control

Шаблон:Sky

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  1. ↑ 1,0 1,1 Шаблон:Cite web
  2. ↑ Ошибка цитирования Неверный тег <ref>; для сносок allen1963 не указан текст
  3. ↑ Шаблон:Cite web
  4. ↑ Шаблон:Cite web
  5. ↑ 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.
  6. ↑ 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.
  7. ↑ Richard Hinckley Allen: Star Names — Their Lore and Meaning: Grus
  8. ↑ 8,0 8,1 8,2 Ошибка цитирования Неверный тег <ref>; для сносок jaavso34_2_156 не указан текст
  9. ↑ Ошибка цитирования Неверный тег <ref>; для сносок Eggen1992 не указан текст
  10. ↑ Ошибка цитирования Неверный тег <ref>; для сносок aj132_4_1445 не указан текст
  11. ↑ Ошибка цитирования Неверный тег <ref>; для сносок aaa352_217 не указан текст
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