A Centauri

A Centauri is a single star in the southern constellation of Centaurus. It is a blue-white in hue and is faintly visible to the naked eye with an apparent visual magnitude of +4.62. The star is located at a distance of approximately 430 light years from the Sun based on stellar parallax. It appears to be drifting further away with a radial velocity of around +6 km/s.
This is a rapidly rotating Be star, showing an emission line spectrum on top of the normal absorption spectrum of the star, due to a circumstellar disk of ejected matter. It doesn't show any absorption lines from the disk. It is a B-type main-sequence star with a stellar classification of B9V.