\begin{table}%t1
\caption{Physical observation parameters.}
\label{ephem}
%\centering
\small
\begin{tabular}{lccc}
\hline \hline
Target &  Date & Observed CML  & Apparent diameter \\
        &      &  ($^{\circ}$W)  &  ($''$)\\
\hline
Io    & 28/01/2005& 60--112      &    0.998\\
Io   &  05/02/2005  & 249--310 &  1.024\\
\hline
\end{tabular}
\end{table}