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Epsilon Virginis (ε Vir, ε Virginis) is the Bayer designation for a star in the zodiac constellation of Virgo. It has the traditional name Vindemiatrix, which comes from Greek through Latin and means Grape Gatherer. The apparent visual magnitude of this star is +2.8,〔 making it the third brightest member of Virgo. Based upon parallax measurements made during the Hipparcos mission, Vindemiatrix lies at a distance of about from Earth, give or take a half light year.〔 Vindemiatrix is a giant star with a stellar classification of G8 III.〔 With 2.6〔 times the mass of the Sun, it has reached a stage in its evolution where the hydrogen fuel in its core is exhausted. As a result, it has expanded to over ten〔 times the Sun's girth and is now radiating around 77〔 times as much luminosity as the Sun. This energy is being emitted from its outer atmosphere at an effective temperature of 5,086 K,〔 which gives it the yellow-hued glow of a G-type star. Since 1943, the spectrum of this star has served as one of the stable anchor points by which other stars are classified.〔 This star is following an orbit through the Milky Way with an eccentricity of 0.11. This will carry it as close as to the Galactic Center, and take it as far as . It is a likely member of the thin disk population and the orbit departs by no more than from the galactic plane.〔 ==Etymology== The traditional names Vindemiatrix and Vindemiator are from Latin ''vindēmiātrix, vindēmitor'' "the grape-harvestress". Additional medieval names are Almuredin, Alaraph, Provindemiator, Protrigetrix, and Protrygetor. This star, along with β Vir(Zavijava), γ Vir (Porrima), η Vir (Zaniah) and δ Vir, (Auva), were Al ʽAwwāʼ, the Barker.〔 In Chinese, (), meaning ''Left Wall of Supreme Palace Enclosure'', refers to an asterism consisting of ε Virginis, η Virginis, γ Virginis, δ Virginis and α Comae Berenices.〔 ''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, ε Virginis itself is known as (, (英語:the Fourth Star of Left Wall of Supreme Palace Enclosure).),〔 (香港太空館 - 研究資源 - 亮星中英對照表 ), Hong Kong Space Museum. Accessed on line November 23, 2010.〕 representing (), meaning ''The Second Eastern General''.〔 (English-Chinese Glossary of Chinese Star Regions, Asterisms and Star Name ), Hong Kong Space Museum. Accessed on line November 23, 2010.〕 東次將 (Dōngcìjiāng), westernized into ''Tsze Tseang'' by R.H. Allen and the meaning is "the Second General"〔(Richard Hinckley Allen: Star Names — Their Lore and Meaning: Virgo )〕 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「Epsilon Virginis」の詳細全文を読む スポンサード リンク
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