\begin{table}%T5
\par
 \caption{\label{tabellermgj577}Relative motion between GJ~577~A and B.} 
 %\centering
\par
\begin{tabular}{ccc}
\hline\hline
&  RA $[$arcsec$]$ & Dec $[$arcsec$]$ \\
\hline
Result of astrometry & $-0.007\pm0.018$ & $-0.029\pm0.015$ \\
(observed) & & \\ 
\hline
If B is non-moving & $-0.071$  & 0.036 \\
(calculated) & & \\
\hline
\end{tabular}
\end{table}