\begin{table}%t1
\caption{Relative astrometric measurements and brightness ratios~$Q$ 
for the Ab Dor B binary. Separation (Sep) and Position Angle (PA) were 
derived from fits to the resolved $H$- and $K$s-band data.
         \label{astrometry}}
\small
%\centerline
 {\begin{tabular}{cccccc}
\hline\hline
  Epoch & Sep. & PA & $Q_{H}$ & $Q_{K\rm s}$ & $Q_{\rm NB3.74}$   \\ 
        & [mas] & [deg] & & & \\ 
            \hline
2004.098     & $66.1\pm1.1~^a$ & $238.5\pm1.3$ & $0.79\pm0.01$ & $0.78\pm0.01$ & $0.79\pm0.02$\\ 
            \hline
\end{tabular}}
\par
\smallskip
\par
$^{{a}}$ This corresponds to a projected separation of 0.99 AU for a distance of 14.94 pc.
\par
\end{table}