\begin{table}%t2
 \caption{Asteroid parameters.}
  \label{Par}
%\centering
\par
\begin{tabular}{lcrc}
\hline  \hline
  Asteroid  & $D$(km) & $albedo$ & Type \\
\hline
 52 Europa      & 303 & 0.058 & C \\
115 Thyra       &  80 & 0.275 & S \\
382 Dodona      &  58 & 0.161 & M \\
\hline
\end{tabular}
\end{table}