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Omicron1 Eridani (also known as Beid and 38 Eridani) is a star of visual magnitude 4.04.〔(Beid )〕 It lies approximately 125 light-years from Earth in the Eridanus constellation and is a class F (F0III) giant with a surface temperature of 7100 K and a luminosity 28 times that of the Sun.〔(SIMBAD data for o1 Eri )〕 In 1971 it was discovered to be a Delta Scuti variable star, with a variation of just a few hundredths of a magnitude with periods of 1.8 and 3.5 days.〔 Omicron1 has the following equatorial coordinates:〔(Frosty Drew Observatory and Sky Theatre — Beid )〕 * Right ascension: * Declination: Its Flamsteed designation is 38 Eridani. ==Chinese name== In Chinese, (), meaning ''Interpreters of Nine Dialects'', refers to an asterism consisting of ο1 Eridani, 39 Eridani, ξ Eridani, ν Eridani, 56 Eridani and 55 Eri.〔 ''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, ο1 Eridani itself is known as (, (英語:the Second Star of Interpreters of Nine Dialects).)〔 (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.〕 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「Omicron1 Eridani」の詳細全文を読む スポンサード リンク
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