Hadar

This is an article on the star Hadar, for the place see Hadar, Ethiopia

Beta Centauri (β Cen / β Centauri), also known as Hadar or Agena, is the second brightest star in the constellation Centaurus and the eleventh brightest star in the nighttime sky.

Beta Centauri is a blue-white giant star that is approximately 525 light-years from the Solar system.

The name hadar comes from the Arabic word for "ground", while the name agena comes from Latin words for "the knee".

• Apparent Visual Brightness (Sirius A = 1): 0.151
• Spectral type: B1 II
• Radial velocity: −12 km/s
• Proper Motion: 0.042 arcsecs/year
• Apparent Visual Magnitude: 0.61
• Absolute Visual Magnitude: −5.42
• Luminosity: 8.6×10⁴ Solar Luminosities