Beta Centauri (β Cen, β Centauri), also known as Hadar or Agena, is the second brightest star in the constellation Centaurus and the tenth brightest star in the night sky.
Beta Centauri (β Cen, β Centauri) is a star system in the southern constellation of Centaurus. With an apparent visual magnitude of 0.60, it is the second brightest star in the constellation Centaurus and the tenth brightest star in the night sky.