\begin{table}%t1
\caption{Number  of  images of    \object{17P/Holmes}   taken   during
the   different         observing            nights        in      the
$BVRI$    filters.}
\label{Table:observations}
\small%\centering
\par
\begin{tabular}{c c c c c}
\hline\hline
Date & $B$ & $V$ & $R$ & $I$ \\
\hline
 26/10/2007 & --  & -- & $1$ & -- \\
 28/10/2007 & $6$  & $6$ & $9$ & $11$\\
 29/10/2007 & $10$ & $5$  & $10$  & $10$ \\
 31/10/2007 & $10$ & -- & $12$ & $13$ \\
 02/11/2007 & $4$ & $3$ & $5$  & -- \\
 05/11/2007 & -- & -- & $5$ & -- \\
 20/11/2007 & -- & -- & $6$ & -- \\
\hline
\end{tabular}
\end{table}