\begin{table}%t1
\caption{\label{obslog}Details of the observations.}
\par
%\centerline
{
\begin{tabular}{cccccc} 
\hline \hline 
Date     & Time  &$\Delta$   &$r_{\rm H}$ & PA  & Phase \\
(2001)   &  UT   & AU        & AU   & deg & deg    \\ 
\hline
Jan. 26  & 06:34--07:17    &  1.298   & 1.355 &   293.2 & 43.5 \\
Jan. 28  & 03:32--04:40    &  1.293   & 1.370 &   293.1 & 43.3 \\ 
Jan. 30  & 03:20--03:49    &  1.290   & 1.387 &   292.9 & 43.0 \\ 
Jan. 31  & 03:20--04:19    &  1.288   & 1.395 &   292.8 & 42.8 \\ 
Feb. 05  & 05:24--06:18    &  1.288   & 1.438 &   291.9 & 41.9 \\ 
\hline 
\end{tabular}}
\medskip
PA and Phase refer to the position angle of the extended Sun-component radius vector and to the
Sun-comet-observer angle, respectively. $r_{\rm H}$ and $\Delta$ are 
the heliocentric and geocentric
distances of the comet during our observations. 
\end{table}