\begin{table}%T6
\caption{\label{tab_compsep}The angular distances between the core and the fitted Gaussian jet components (or their flux density weighted mean; cf. text). The errors reflect uncertainties in the fitting process and increase with decreasing component flux density, while derivation of the apparent velocities is
  described in the text. The position angles of the components did not change significantly during the observing epochs and were omitted. In the last column the read out values from a map by B02 are given for comparison, but cannot be included in the calculations due to lack of a Gaussian model fit.}
%\centerline
{
\begin{tabular}{c|cc|cc|c}
\hline \hline
 \multicolumn{1}{c}{Epoch \& observ. freq. {[}GHz{]}:} & 25 Sep. 1991 at 1.66 [T95]& 13 Feb. 2002 at 1.66 &\multicolumn{2}{|c|}{Mean App. 
Transv. velocity}& 19 Apr. 1995 at
 2.3 \\
\hline 
components: & \multicolumn{2}{|c|}{Distances in Fig.~\ref{fig_superlum} $[{\rm mas}]$} &$\mu
 [{\rm mas~yr^{-1}}]$&$\beta_{{\rm app};h=0.71} ~^{b}$ & Dist. in Fig.~\ref{fig_superlum} $[{\rm mas}]$ \\
\emph{Core-A} & $(19.6\pm0.5)$ & $( 23.3\pm 0.5)$ & $(0.36\pm0.07)$& $(22.5\pm4)$& $(21.5\pm3)$  \\
\emph{Core-B} & $(53.7\pm1)$ & $( 52.1 \pm 1 )$ & $0 ~^{a}$ & $0$& $(52\pm5)$ \\
\hline
\end{tabular}}
\smallskip
   $^{a}$  No significant propagation of the
  {B} component was found with respect to the errors. \\
   $^{b}$  For the
  calculations we
    used $H_0=71^{+4}_{-3}~{\rm km~s^{-1}}~{\rm Mpc^{-1}}$ and a deceleration parameter
    $q_0=0.1$. 
\end{table}