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| dec = 〔 | appmag_v = 11.46 | constell = Dorado }} R99 (HD 269445) is a star in the Large Magellanic Cloud in the constellation Dorado. It is classified as a luminous blue variable and is one of the most luminous stars known. R99 has a peculiar spectrum that has been described as OBf:pe, "unclassifiable", peculiar WN10, "similar to the unusual LBV HD 5980", "unique", and Ofpe/WN9. It shows brightness variations of about 0.3 magnitude over a period of decades, and smaller amplitudes with the strongest periods at two and ten days. The colour also varies, with the star being bluer at minimum light. It has been classified as a Luminous Blue Variable on account of the variability and spectrum, although it has never been observed in outburst.〔 ==References== 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「R99」の詳細全文を読む スポンサード リンク
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