\begin{table}%t1
\caption{Positions and flux densities of C7 at 22~GHz.}\label{tb:c7}
%\centerline
{
\begin{tabular}{lrrr}
\hline\hline
\multicolumn{1}{c}{$t_{{\rm obs}}$} & \multicolumn{1}{c}{$S$} & \multicolumn{1}{c}{$\Delta x$} & \multicolumn{1}{c}{$\Delta y$} \\
\multicolumn{1}{c}{$[{\rm year}]$} & \multicolumn{1}{c}{$[{\rm Jy}]$} & \multicolumn{1}{c}{$[{\rm mas}]$} & \multicolumn{1}{c}{$[{\rm mas}]$} \\ \hline
1989.25$^{\dag}$ & $0.19\pm0.02$ & $0.04\pm0.02$ & $ 0.01\pm0.01$  \\ 
1991.46 & $0.80\pm0.04$ & $0.09\pm0.05$ & $-0.01\pm0.01$  \\ 
1991.86 & $3.29\pm0.49$ & $0.12\pm0.01$ & $ 0.03\pm0.01$  \\ 
1992.45 & $6.20\pm0.36$ & $0.18\pm0.01$ & $ 0.00\pm0.01$  \\ 
1992.86 & $5.49\pm0.30$ & $0.28\pm0.01$ & $ 0.01\pm0.01$  \\ 
1993.13 & $3.60\pm0.10$ & $0.34\pm0.01$ & $-0.02\pm0.01$  \\ 
1993.72 & $2.23\pm0.12$ & $0.60\pm0.04$ & $-0.10\pm0.02$  \\ 
1994.45 & $1.04\pm0.10$ & $0.90\pm0.09$ & $-0.12\pm0.08$  \\ 
1995.85 & $1.21\pm0.06$ & $1.20\pm0.08$ & $-0.10\pm0.08$  \\ 
1996.42 & $0.88\pm0.05$ & $1.36\pm0.08$ & $-0.07\pm0.07$  \\ 
1996.82 & $0.69\pm0.04$ & $1.55\pm0.08$ & $-0.08\pm0.12$  \\ 
1997.40 & $0.64\pm0.10$ & $1.87\pm0.10$ & $-0.22\pm0.13$  \\ 
1997.62 & $0.59\pm0.07$ & $2.02\pm0.10$ & $-0.24\pm0.12$  \\ 
1997.90 & $0.47\pm0.07$ & $2.10\pm0.10$ & $-0.30\pm0.11$  \\ 
1998.02 & $0.47\pm0.08$ & $2.02\pm0.25$ & $-0.24\pm0.14$  \\ 
1998.99 & $0.50\pm0.10$ & $2.63\pm0.20$ & $-0.15\pm0.14$  \\ 
1999.12 & $0.28\pm0.10$ & $2.69\pm0.20$ & $-0.36\pm0.14$  \\ 
1999.64 & $0.17\pm0.20$ & $2.87\pm0.20$ & $-0.34\pm0.15$  \\ 
\hline
\end{tabular}}
\medskip
Note: $\dag$ -- detection is likely to be confused due to blending
between the core and the preceeding jet component C6. 
References: \mbox{1989.25--1993.72} (L96); 1994.45 (Lepp\"anen et~al. \cite{lzd95}); \mbox{1996.42--1997.40} (R00);  1997.62--1999.64 (Klare \cite{kla03}).
\end{table}