\begin{table}%T6
\par
%\centering
\par
\caption{\label{residuals} (O--C) residuals for our visual orbit for
 Gliese~22~AC and the most recent astrometric orbit for this system
 presented by S\"oderhjelm (\cite{Sod99}).
 $\theta$ is given in degrees and $\rho$ in arcseconds.}
\begin{tabular}{lllll}\hline\hline
Epoch & \multicolumn{2}{c}{S\"oderhjelm (\cite{Sod99})} &
        \multicolumn{2}{c}{This work} \\
        & $\theta$ & $\rho$ & $\theta$ & $\rho$ \\ \hline
1989.778  &  +2.4 & +0.006 & +3.5 & --0.041 \\
1989.939  &  +0.1 & +0.010 & +1.8 & --0.033 \\
1990.693  &  --3.3 & --0.026 & +0.6 & --0.055 \\
1991.717  & --13.2 & +0.032 & --6.8 & +0.007 \\
1993.745  & --14.7 & +0.056 & --0.3 &  0.000 \\
1994.074  & --16.2 & +0.065 & +0.1 & +0.001 \\
1994.704  & --19.5 & +0.085 & +0.6 & +0.010 \\
1994.947  & --21.1 & +0.102 & +0.7 & +0.024 \\
1995.767  & --26.9 & +0.082 &  0.0 & --0.003 \\
1996.739  & --32.7 & +0.083 &  0.0 & +0.003 \\
1997.876  & --38.7 & +0.020 & --0.6 & --0.023 \\
2001.107  &  --6.3 & --0.070 & +0.2 & +0.004 \\
2001.838  &  --1.6 & --0.012 & --0.8 & +0.009 \\
2002.797  &  --1.5 & --0.009 &  0.0 & --0.010 \\\hline
\end{tabular}
\end{table}