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The Bayer designation Sigma Cancri (σ Cnc / σ Cancri) is shared by three star systems, in the constellation Cancer: * σ¹ Cancri, which has the Flamsteed designation 51 Cancri * σ² Cancri, which has the Flamsteed designation 59 Cancri * σ³ Cancri, which has the Flamsteed designation 64 Cancri The above correspondence between Flamsteed and Bayer designations is the modern one, which is based on the ''Atlas Coelestis Novus'' published by Eduard Heis in 1872. An alternate correspondence sometimes encountered, for instance in the 1835 astronomical catalogue of Thomas Brisbane, is: * σ¹ Cancri = 46 Cancri * σ² Cancri = 57 Cancri * σ³ Cancri = 61 Cancri Johann Bayer's Uranometria places the sigma between these two groups of stars, making proper association uncertain. ==References== * The Bright Star Catalogue, 5th Revised Ed. 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 Cancri」の詳細全文を読む スポンサード リンク
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