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Delta Sagittarii (Delta Sgr, δ Sagittarii, δ Sgr) is a double star〔 in the southern zodiac constellation of Sagittarius. It has the traditional names Kaus Media, Kaus Meridionalis, and Media.The apparent visual magnitude of this star is +2.70,〔 making it easily visible to the naked eye. Parallax measurements place the distance at roughly from Earth.〔 This is a giant star with a stellar classification K3 III. It has three dim companions: * a 14th magnitude star at a separation of 26 arcseconds, * a 15th magnitude star at a separation of 40 arcseconds, and * a 13th magnitude star at a separation of 58 arcseconds from the primary. It is not certain that these stars form a physical system or whether they are merely aligned by chance. ==Name and etymology== *The names ''Kaus Media'', ''Kaus Meridionalis'', and ''Media'', are come from the Arabic قوس ''qaws'' 'bow' and Latin ''media'' 'middle'. *This star, together with : * *γ Sgr, ε Sgr, ζ Sgr, λ Sgr, σ Sgr, τ Sgr and φ Sgr, comprising the asterism ''Teapot''.〔 (【引用サイトリンク】 publisher = deepsky.astroinfo.org )〕〔(skywatchers )〕 * *γ Sgr, ε Sgr and η Sgr were ''Al Naʽām al Wārid'' (النعم الوارد), the Going Ostriches. * *γ Sgr and ε Sgr were Akkadian ''Sin-nun‑tu'', or ''Si-nu-nu‑tum'', the Swallow.〔 *In the catalogue of stars in the ''Calendarium'' of Al Achsasi al Mouakket, this star was designated Thanih al Waridah, which was translated into Latin as Secunda τού al Warida, meaning ''second going ostrich''. *In Chinese, (), meaning ''Winnowing Basket'', refers to an asterism consisting of δ Sagittarii γ Sagittarii, ε Sagittarii and η Sagittarii. Consequently, δ Sagittarii itself is known as (, (英語:the Second Star of Winnowing Basket).)〔 (AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 5 月 11 日 )〕 *In the Hindu system of astrology, this star is also called "''Purvashada Nakshatra''". 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「Delta Sagittarii」の詳細全文を読む スポンサード リンク
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