\begin{table}%t1
\caption{Initial radius $R_{{\rm D0}}$ and mass $M_{{\rm D0}}$ of the minimum mass and maximum mass solar
  nebula models characterized by $\alpha$ = 0.003 and constrained by Mousis et~al. (\cite{Mousis2000}).}
%\centering
\par
\begin{tabular}[]{lcc}
\hline
\hline
\noalign{\smallskip}
 &$R_{{\rm D0}}$ (AU)  &  $M_{{\rm D0}}$ ($M_\odot$)  \\
\noalign{\smallskip}
\hline
\noalign{\smallskip}
Minimum mass solar nebula                & 15  & 0.06\\
Maximum mass solar nebula                & 27 & 0.3\\
\noalign{\smallskip}
\hline
\end{tabular}
\end{table}