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Xi Draconis
Xi Draconis (ξ Dra, ξ Draconis) is the Bayer designation for a star in the northern circumpolar constellation of Draco. It has the traditional name Grumium or Genam. This star, along with β Dra (Rastaban), γ Dra (Eltanin), μ Dra (Erakis) and ν Dra (Kuma) were Al ʽAwāïd, "the Mother Camels", which was later known as the Quinque Dromedarii.〔 This star has an apparent visual magnitude of 3.75.〔 Based upon parallax measurements, it is located at a distance of from Earth.〔 At this distance, the apparent magnitude is diminished by 0.03 from extinction caused by intervening gas and dust.〔
In Chinese, (), meaning ''Celestial Flail'', refers to an asterism consisting of ξ Draconis, ν Draconis, β Draconis, γ Draconis and ι Herculis.〔 ''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, δ Draconis itself is known as (, (英語:the First Star of Celestial Flail).)〔 (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.〕
==Structure==
Xi Draconis is of spectral class K2-III.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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