About HD 190429
HD 190429 is a rare star. It lies about 2,811.7 light-years from Earth, sits in the constellation Cyg, shines at apparent magnitude 6.62 and has spectral type Oe+....
Its spectrum reads Oe+... — 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.