\begin{table}%t1
%\centering
\par
\caption{Imaging: summary of the observations.\label{tab:obs}}
\begin{tabular}{cccccc}  
\hline
\hline
Filter & ESO id  & No. of exp. & Total exp. & Seeing & Mag. limit (AB)\\
 &  &  & (s) & (arcsec)  & (5$\sigma$, $2\times\it FWHM$) \\
\hline
$V$ & V/89   & 5  & 750  & 1.35 & 22.5 \\
$R$ & Rc/162 & 5  & 750  & 1.15 & 22.7 \\
$I$ & Ic/Iwp & 10 & 1800 & 1.25 & 21.5 \\
\hline
\end{tabular}
\end{table}