\begin{table}%t3
\par
 \caption{\label{tabellermhd77}Relative motion between HD~77407~A and B.}
  %\centering
\par
\begin{tabular}{ccc}
\hline\hline
&  RA [arcsec] & Dec [arcsec] \\
\hline
Result of astrometry & $-0.023\pm0.010$ & $-0.034\pm0.005$ \\
(observed) & & \\ \hline
If B is non-moving & $-0.109$  & $-0.180$ \\
(calculated) & & \\
\hline
\end{tabular}
\end{table}