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SN 1999ec
SN 1999EC is a type Ib supernova that was discovered in the interacting galaxy NGC 2207 in October 1999.〔 It was found on images taken with the Katzman Automatic Imaging Telescope at the Lick Observatory.〔 The progenitor is estimated to have had 38 times the mass of the Sun and was 5.34 million years old at the time of the 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「SN 1999ec」の詳細全文を読む
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