|
Sigma Hydrapp (σ Hydrae, σ Hya) is the 4th-magnitude star in the constellation Hydra. Sigma Hydrae belongs to spectral class K1+III and has apparent magnitude +4.44. It is approximately 353 light years from Earth ==Etymology== It is also known by the proper name Minchir, and appears as ''Minchir es-schudscha This star, along with δ Hya (Lisan al Shudja), ε Hya, ζ Hya, η Hya and ρ Hya, were Ulug Beg's Min al Azʽal, "Belonging to the Uninhabited Spot". According to the catalogue of stars in the ''Technical Memorandum 33-507 - A Reduced Star Catalog Containing 537 Named Stars'', ''Min al Azʽal'' or Minazal were the title for five stars : δ Hya as ''Minazal I'', η Hya as ''Minazal II'', ε Hya as ''Minazal III'', ρ Hya as ''Minazal IV'' and ζ Hya as ''Minazal V'' (exclude this star)〔(Jack W. Rhoads - ''Technical Memorandum 33-507-A Reduced Star Catalog Containing 537 Named Stars'', Jet Propulsion Laboratory, California Institute of Technology; November 15, 1971 )〕 In Chinese, (), meaning ''Willow (asterism)'', refers to an asterism consisting of σ Hydrae, δ Hydrae, η Hydrae, ρ Hydrae, ε Hydrae, ζ Hydrae, ω Hydrae and θ Hydrae〔 ''中國星座神話'', written by 陳久金. Published by 台灣書房出版有限公司, 2005, ISBN 978-986-7332-25-7.〕 Consequently, σ Hydrae itself is known as (, (英語:the Second Star of Willow).).〔 (AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 5 月 28 日 )〕 The people of Groote Eylandt, called Unwala, "The Crab", for the star cluster including this star, δ Hya (Lisan al Shudja), ε Hya, ζ Hya, η Hya and ρ Hya.〔''Encyclopaedia of the history of science, technology, and medicine in non-western cultures'', ed. Helaine Selin, Dordrecht, Kluwer Academic Publishers, 1997, (p.105 ).〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Sigma Hydrae」の詳細全文を読む スポンサード リンク
|