Beta Centauri

Beta Centauri (β Centauri, β Cen, Agena, or Hadar), is a triple star system in the southern constellation of Centaurus. 
The system's combined apparent visual magnitude of 0.61 makes it the second-brightest star in Centaurus and one of the brightest stars in the night sky. According to parallax measurements from the astrometric Hipparcos satellite, the distance to this system is about .
Beta Centauri is well known in the Southern Hemisphere. A line made from Alpha Centauri, through Beta Centauri leads to within a few degrees of Gacrux, the star at the top of the Southern Cross. Using Gacrux, a navigator can draw a line with Acrux at the bottom to find South.