**Table 4:** Variation of the effective temperature, luminosity and average large separation for models AC and OM when subjects to a small variation of mass or age. The mass variation are given in $M_{\odot }$ , the age in Myr the effective temperatures in K and the average large separation in $\mu$ Hz.
Model		$\Delta M$		$\Delta t$
		$\overline{-0.01\ \ \ +0.01}$		$\overline{-100\ \ \ +100}$
	$\Delta {T_{\rm eff}}$	+3.3	-1.5	+1.2	+1.8
AC	$\Delta ({L/L_{ \odot}})$	+0.003	-0.003	+0.007	-0.006
	$\Delta {\rm (\Delta \nu_0)}$	-3.0	+3.0	+1.0	-1.0
	$\Delta {T_{\rm eff}}$	+8.0	-3.1	+11.1	-11.1
OM	$\Delta ({L/L_{ \odot}})$	-0.017	+0.017	-0.002	+0.002
	$\Delta { (\Delta \nu_0)}$	+3.0	-2.0	+1.0	-1.0

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