Some facts about Alpha Centauri B Parallax: 0.742 arcsecs Spectral type: KO-1 V Radial velocity: -21 km/s Proper Motion: 3.724 arcsecs/year Apparent Visual Magnitude: 1.35 Absolute Visual Magnitude: 5.70 Luminosity: 0.55 Solar Luminosities See also: Alpha Centauri, Alpha Centauri A, Proxima Centauri List of nearest stars