**Table 1:** Properties of $\alpha$ Cen A and B.
	$\alpha$ Cen A	$\alpha$ Cen B
Other names	HD 128620	HD 128621
	HIP 71683	HIP 71681
m_V	-0.01	1.33
m_J	-1.16	-0.01
m_H	-1.39	-0.49
m_K	-1.50	-0.60
Spectral type	G2V	K1V
$T_{{\rm eff}}$ (K)^a	$5790 \pm 30$	$5260 \pm 50$
$\log g$ ^a	$4.32 \pm 0.05$	$4.51 \pm 0.08$
$\left[ {\rm Fe/H} \right]$ ^a	$0.20 \pm 0.02$	$0.23 \pm 0.03$

^a From Morel et al. (2000) and references therein.

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