\begin{table}%t1
\caption{Astrometric measurements of T~Tau N -- S (S unresolved).}\label{ObsNSTab}
%\centering
\small
\begin{tabular}{lccl}
\hline\hline
Date (UT) 	& \multicolumn{1}{c}{$d$ [mas]}	& \multicolumn{1}{c}{PA~$[^\circ]$} & Source \\
\hline
1989 Dec. 10	& $720\pm14$ 	& $175.5\pm1.0$ 	& \cite{ghez95}\\
1990 Nov. 10	& $716\pm14$ 	& $176.2\pm1.0$ 	& \cite{ghez95}\\
1991 Nov. 19	& $702\pm14$ 	& $176.4\pm1.0$ 	& \cite{ghez95}\\
1992 Feb. 20	& $710\pm14$ 	& $176.7\pm1.0$ 	& \cite{ghez95}\\
1992 Oct. 11	& $692\pm15$ 	& $177.0\pm1.4$ 	& \cite{ghez95}\\
1993 Nov. 25	& $701\pm14$ 	& $177.0\pm1.0$ 	& \cite{ghez95}\\
1993 Dec. 26	& $690\pm14$ 	& $176.0\pm1.1$ 	& \cite{ghez95}\\
1994 Sep. 22	& $689\pm14$ 	& $175.9\pm1.2$ 	& \cite{ghez95}\\
1994 Oct. 19	& $689\pm14$ 	& $178.2\pm1.1$ 	& \cite{ghez95}\\
1994 Dec. 25	& $718\pm 9$ 	& $177.6\pm0.7$ 	& \cite{roddier00}\\
1997 Nov. 17	& $709\pm 6$ 	& $180.2\pm0.5$ 	& \cite{roddier00}\\
1998 Nov. ~2	& $704\pm 6$ 	& $180.7\pm0.5$ 	& \cite{roddier00}\\
1999 Nov. 23	& $699\pm 6$ 	& $181.0\pm0.5$ 	& \cite{roddier00}\\
1997 Dec. ~4	& $685\pm13$ 	& $179.5\pm1.0$ 	& \cite{white01}\\
1997 Dec. ~6	& $698\pm13$ 	& $179.1\pm1.0$ 	& \cite{white01}\\
2000 Feb. 20	& $691\pm 2$ 	& $181.7\pm0.8$ 	& This work\\
\hline
\end{tabular}
\end{table}