\begin{table}%t2
\caption{\label{tab2}TrES-2 physical parameters (adopted from Holman et~al.).}
%\centering
\small
\begin{tabular}{p{0.5\linewidth}l}
\hline\hline
TrES-2 system parameters      &  Values \\
\hline
$M_{*}$   & 0.98 $M_{\rm o}$     \\
$M_{\rm p}$   &  1.198 $M_{\rm J}$ \\
$R_{*}$   &  1.003 $R_{\rm o}$ \\
$R_{\rm p}$   &  1.222 $R_{\rm J}$ \\
Orbit radius   & $0.0367$ AU     \\
Period   & $2.470621$ days \\
\hline
\end{tabular}
\end{table}