About HD 91452
HD 91452 is a rare star. It sits in the constellation Car, shines at apparent magnitude 7.49 and has spectral type O9.5Iab-Ib.
Its spectrum reads O9.5Iab-Ib — 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.