BI 253是一个大麦哲伦星系内的O型主序星,是已知光谱形式最早期的恒星之一,光谱类型 O2V(f*),被认为是 O2 型恒星的标准形式[1][2]。该恒星被列为速逃星,光谱法观测发现它的运动速度超过100 km/sec。
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