\begin{table} %t1
%%\centering
\par
 {\caption{Projected sizes and speeds of the XZ~Tauri outer bowshock (and 
an average speed of the 
jet knot) as it 
evolves. Distances are quoted 
for the latter date of the observation interval. Errors are at the three sigma 
level. }\label{ProperMotions}}
 {\begin{tabular}{lcccc}
\hline\hline
Observation			&Distance 	&Bubble 	&Longitudinal 		&Transverse		\\
date/interval			&from source	&width		&speed			&speed			\\
				&(AU)		&(AU)		&(km~s$^{\rm -1}$)	&(km~s$^{\rm -1}$) 	\\ \hline 
1995 Jan. 5			&$598 \pm 16$	&$336 \pm 25$	&--			&--			\\ 
1995 Jan. 5 to 1998 Mar. 25 	&$697 \pm 10$	&$405 \pm 14$	&$146 \pm 28$ 		&$101 \pm 42$		\\ 
1998 Mar. 25 to 1999 Feb. 3	&$721 \pm 9$	&$423 \pm 5$	&$130 \pm 73$ 		&$105 \pm 83$		\\ 
1999 Feb. 3 to 2000 Feb. 6		&$746 \pm 11$	&--		&$119 \pm 65$ 		&--			\\ 
2000 Feb. 6 to 2001 Feb. 10	&$771 \pm 10$	&--		&$117 \pm 69$ 		&--			\\ 
%			&		&		&			&			\\ 
1998 Mar. 25 to 2001 Feb. 10	&--		&--		&$130 \pm 84$ (jet)	&--			\\ \hline
\end{tabular}}
\end{table}