\begin{table}%T4
\par
\caption{\label{tabellegj577}Separation between GJ~577~A and B.} 
%\centering
\par
\begin{tabular}{ccc}
\hline\hline
Epoch      &  RA $[$arcsec$]$ & Dec $[$arcsec$]$ \\
\hline
April 2002 &$5.332 \pm 0.018$&$0.865 \pm 0.012$\\
Dec. 2002 & $5.325 \pm 0.003$&$0.836 \pm 0.009$\\
\hline
\end{tabular}
\end{table}