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来自维基百科,自由的百科全书
BI 253是一個大麥哲倫星系內的O型主序星,是已知光譜形式最早期的恆星之一,光譜類型 O2V(f*),被認為是 O2 型恆星的標準形式[1][2]。該恆星被列為速逃星,光譜法觀測發現它的運動速度超過100 km/sec。
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