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Xi Sagittarii : ウィキペディア英語版 | Xi Sagittarii
The Bayer designation Xi Sagittarii (Xi Sgr, ξ Sagittarii, ξ Sgr) is shared by two stars, ξ¹ Sagittarii and ξ² Sagittarii, in the constellation Sagittarius, separated by 0.46° in the sky. Because they are close to the ecliptic, they can be occulted by the Moon and, very rarely, by planets. The last occultation of ξ² Sagittarii by a planet took place on 22 December 1810, when it was occulted by Venus. ==ξ¹ Sagittarii== Xi¹ Sagittarii (Xi¹ Sgr, ξ¹ Sagittarii, ξ¹ Sgr) is a spectral type B9.5 supergiant which has an apparent magnitude of +5.08. It is at least 2300 light years from Earth.
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「Xi Sagittarii」の詳細全文を読む
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