\begin{table}%t4
\caption{Relative astrometric results for CT Cha A and companion.
\label{table:4}}
%\centerline
 {
\begin{tabular}{ccc}
\hline\hline
Epoch differ- & Change in sepa-& Change in \\
ence [days] &  ration [pixel] & PA$^a$ [$\deg$] \\
\hline
 378.08299        & --0.09~$\pm$~0.20 & --0.036~$\pm$~0.086\\
\hline
\end{tabular}}
\par
\smallskip
Remarks: all data from $K\rm s$-band images. $^a$ PA is measured from N over E to S.
\end{table}