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Alpha Centauri
 (trinary)
aka Rigil Kent, Rigil Kentaurus, Rigel Kentaurus, Rigel Kentarius
 (Greek: "the centaur's leg", "the centaur's foot")
aka Wazn
 (Arabian)

in the constellation Centaurus

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Alpha Centauri A
aka HR 5459
aka HD 128620

Alpha Centauri B
aka HR 5460

Alpha Centauri C
aka Proxima Centauri
aka V645 Centauri

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                     A        B       C
Distance (ly)        4.341    4.341   4.224
Mass (suns)          1.09     0.87    0.1
Absolute Magnitude   4.37     5.71    15.49
Spectral Type        G2 V     dK1 V   dM5.5 Ve
Temperature (K)      5,750    5,300   2,700
Luminosity           1.53     0.45    0.000 06
Color:               Yellow   Orange  Red
Diamater (suns)      1.07     0.70    0.25
         (km)                         65,000
Age (billion years)  5 - 6    5 - 6   1?

A/B:
Orbital inclination (degrees): 79.240
Eccentricity: 0.521, 0.516
Period (years): 79.920
Distance: Nearest: 11.2 AU
          Farthest: 35.3 AU
          Average: 23.2 AU
Farthest stable planetary orbit: A: 2.68 AU
                                 B: 2.34 AU
Periastron: 1955.56, 2034.48, 2115.40, 2195.32, 2275.24, 2355.16, 
            2435.08, 2515.00, 2594.92, 2674.84, 2754.76, 2834.68, 
            2914.60, 2994.52, 3074.44

AB/C
Distance: 1/6 ly, 13,000 AU
Perioud (years): 1,000,000
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