Alpha Centauri B
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Spectral class: K0-3V orange
Absolute Magnitude: 5.70
Luminosity: 0.46
Metallicity: 132%
Diameter: 1,000,000 km
Part of the closest stellar system to Sol just 4.35 light years away, Alpha Centauri B is the binary companion to Alpha Centauri A in the Alpha Centauri system. It is also known by the name Gliese 559 B.
Orbital parameters
Period: 79.92 yr
Semi-major axis: 23.6 AU
Eccentricity: 0.516
The AB system has a period of 79.92 years, orbiting with a semimajor axis of 23.60 AUs. The orbit has an eccentricity of 0.516, reaching 35.78 AUs in apastron and coming as close as 11.42 AUs in periastron.
