\begin{table}%t1
%\centering
\par
\caption{Dates and geometric data (range) of the objects observed.}
\label{tabdatgeo}
\begin{tabular}{llccccr}\hline\hline
 &Object  & $r_{\rm h}$(AU) &  $\Delta$ (AU) &  $\alpha$(deg) 
& No of images & Observing dates \\ \hline
%&&&&\\
TNOs\\
&1999~TC$_{36}$ & 31.3 & 30.57--30.49 & 1.30--1.14 &205&13, 15, 17--20, AUG. (2001)\\ 
&1999~TD$_{10}$ & 12.7 & 11.75--11.77 & 0.86--1.10 &450&23--26, OCT. (2001)\\ 
&2000~EB$_{173}$ & 29.6 & 29.18--28.71 &1.72--0.87 &503&9--10, FEB. (2002); 8--10, MAR. (2002)\\ 
&(2000 WR$_{106}$) Varuna & 43.1 & 42.33--43.34 & 0.81--0.83 &343& 8--9, FEB. (2002)\\ 
&(2001 KX$_{76}$) Ixion & 43.1 & 42.81--42.87 & 1.30--1.32&180 &15, 17--19, AUG. (2001)\\
&2002~CR$_{46}$ &  18.1 &  17.37--17.40 & 2.15--2.23 &190 &8--10, MAR. (2002) \\
\hline 
Centaurs\\ 
&2000~QC$_{243}$ & 19.2 & 18.21--18.17 & 1.12--0.77 &290&13, 15, 17--20, AUG. (2001)\\ 
&2001~PT$_{13}$ & 8.9 & 7.93--8.45 & 2.67--5.89 &681&10--11, 13--14, SEP. (2001); 23--28, OCT. (2001)\\ 
&2002~PN$_{34}$ & 13.4 & 12.50--12.52 & 2.30-2.43 &260&28--30, AUG. (2002)\\ 
&2002~GO$_9$    & 14.4 & 13.17-13.18  & 2.15--2.26 &263& 18--19, MAY (2002)\\
\hline
\end{tabular}
\end{table}