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Table 4

Properties of the α Centauri binary.

α Cen A α Cen B

Sp.typea G2 V K1 V
Teff (K)b 5824 ± 24 5223 ± 62
Lstar (L)b
Mstar (M)bc 1.105 ± 0.007 0.934 ± 0.006
Rstar (R)a 1.224 ± 0.003 0.863 ± 0.005
acrit (AU)d 2.778 ± 1.476 2.522 ± 1.598

Common parameters

Inclination to LOS, i (°)c 79.20 ± 0.04
Arg. of periapsis, ω (°)c 231.65 ± 0.08
Long. of asc. node, Ω (°)c 204.85 ± 0.08
Period (yr)bc 79.91 ± 0.01
Eccentricityc 0.5179 ± 0.0008
Distance (pc)b 1.348 ± 0.035
Age (yr)e (4.85 ± 0.50) × 109

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