Alpha Centauri B - Definition

Alpha Centauri B (also Rigel Kentaurus B — the foot of the centaur in Arabic) is a star of the Alpha Centauri star system. It is approximately 4.40 light years from Earth's Solar System.

Alpha Centauri B is also known as HD 128621, HR 5460, GCTP 3309.00B, and LHS 51.

Some facts about Alpha Centauri B

• Parallax: 0.742 arcsecs
• Spectral type: K0-1 V
• Radial velocity: -21 km/s
• Proper Motion: 3.724 arcsecs/year
• Apparent Visual Magnitude: 1.35
• Absolute Visual Magnitude: 5.70
• Luminosity: 0.5 Solar Luminosities
• Diameter: 0.865 times that of the Sun
• Angular diameter: 6.002 milliarcseconds

See also

• Alpha Centauri, Alpha Centauri A, Proxima Centauri
• List of nearest stars

References

• A Family Portrait of the Alpha Centauri System (http://www.spaceref.com/news/viewpr.html?pid=11016), March 21, 2003.