About HD 15137
HD 15137 is a rare star. It lies about 2,764 light-years from Earth, sits in the constellation Per, shines at apparent magnitude 7.89 and has spectral type O9.5V.
Its spectrum reads O9.5V — an O-type star — the hottest, rarest main class there is. Fewer than one star in a million is an O, and none of them lasts long.