**Table 1:** Adopted constraints for our models of Procyon A: mass $M_\star$ , effective temperature $T_{\rm eff}$ , radius $R_\star$ , surface metallicity ${\rm [{Fe/ H}]_s}$ , and galactic enhancement ${\Delta Y/\Delta Z}$ .
1.36	$< M_\star/M_\odot <$	1.48	AP02 + Hipparcos
6480	$< T_{\rm eff} <$	6580	AP02
2.023	$< R_\star/R_\odot <$	2.073	Kervella et al. (2004)
-0.08	$< {\rm\left[{Fe/H}\right]_s} <$	-0.02	AP02
1.5	$< {\rm\Delta Y/\Delta Z} <$	4.

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