\begin{table}%t4
\caption{Absolute magnitudes of AB~Pic~b compared to evolutionary model predictions (Burrows et~al. \cite{burr97}; Baraffe et~al. \cite{bara02}; B.~Macintosh \& T. Barman, private communication).}\label{tab4}
%\centerline
{
\begin{tabular}{lllllll}     
\hline\hline                 
Model 	&Age	&Mass	&$T_{{\rm eff}}$	&$M_{J}$	&$M_{H}$	&$M_{K}$   \\
		&(Myr)	&($M_{{\rm Jup}}$)	&(K) &(mag)  & (mag)       &   (mag)   \\
\hline
AB~Pic~b	&30	&	& 	&12.80	&11.37	&10.76\\
\hline
Burrows$^{*}$		&30.4	&13	&1513	 &12.8	&11.9	&11.2\\
		&30.4	&14	&1856	& 11.5	&10.7	&10.1\\
\hline
DUSTY$~^{*}$	&30	&13	&1594	& 14.0	&12.2	&11.0\\
		&30	&14	&1764	& 12.8	&11.5	&10.5\\
		&20	&13	&1672	& 13.2	&11.7	&10.7\\
		&40	&14	&1701	& 13.3	&11.8	&10.7\\
\hline                  
\end{tabular}}
\medskip
$^{*}$ The gravity factor log~($g$) is respectively equal to~4.0 and~4.1 for the Burrows and DUSTY~models.
\end{table}