Ara is a southern constellation. It is a minor constellation south of Scorpio, and has been called "the one who offers sacrifices" since the Greek period. Alpha has a magnitude of 3.0 and a spectral type of B3, Beta has a magnitude of 2.8 and a spectral type of K1, and Gamma has a magnitude of 3.5 and a spectral type of B1. It contains open clusters NGC6208 and IC4651, and globular clusters NGC6352, NGC6362, and NGC6397. Its approximate position is 17h10m in right ascension and -55° in declination. It reaches its culmination at 8pm in early August. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
略号はAra。南天の星座。さそり座の南につづく小星座で,ギリシア時代より〈犠牲をささげるもの〉と呼ばれていた。α星は光度3.0等,スペクトル型はB3,β星は2.8等,スペクトル型はK1,γ星は3.5等,スペクトル型はB1である。散開星団NGC6208,IC4651,球状星団NGC6352,NGC6362,NGC6397がある。概略位置は赤経17h10m,赤緯-55゜。午後8時の南中は8月上旬である。
出典 株式会社平凡社世界大百科事典 第2版について 情報 |
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