\begin{table}%t2
%\centering
\par
   \caption{Parameters of the observations.   \label{tab1}}
   \begin{tabular}{cccccccc}\hline \hline
   Date & Filter & $r_h$ & $\Delta$ & Phase angle & Scattering & Pixel or & Scale\\
   2003 & $\lambda_0$/{\it FWHM} &       &          &       & plane      & diaphragm & at comet \\
   (UT) & (nm) & (AU) & (AU) &($^{\circ}$)&($^{\circ})$& (arcsec) & (km arcsec$^{-1}$)\\ \hline
   \multicolumn{8}{c}{CCD polarimetry at 2-m telescope of the Rozhen Observatory}\\ \hline
   Nov. 20.746 & 642/2.6 & 0.946 & 0.265 & 91.1 & 58.8 & 0.88 & 192\\
   Nov. 21.750 & 642/2.6 & 0.930 & 0.268 & 94.6 & 57.2 & 0.88 & 194\\
   Nov. 22.738 & 642/2.6 & 0.913 & 0.271 & 98.0 & 55.7 & 0.88 & 197\\
   Nov. 20.751 & 662/5.9 & 0.946 & 0.265 & 91.2 & 58.8 & 0.88 & 192\\
   Nov. 21.767 & 662/5.9 & 0.929 & 0.268 & 94.7 & 57.2 & 0.88 & 194\\
   Nov. 20.700 & 694/79 & 0.947 & 0.265 & 91.0 & 59.0 & 0.88 & 192\\
   Nov. 21.702 & 694/79 & 0.930 & 0.267 & 94.4 & 57.4 & 0.88 & 194\\ \hline
   \multicolumn{8}{c}{Aperture polarimetry at 2.6-m telescope of the Crimean
   Astrophysical Observatory}\\ \hline
   Nov. 21.718 & $R$ & 0.930 & 0.268 & 94.5 & 57.3 & 15 & 194\\
   Nov. 23.792 & $R$ & 0.895 & 0.275 & 101.6 & 54.3 & 15 & 199\\
   Nov. 24.802 & $R$ & 0.877 & 0.279 & 105.0 & 53.0 & 15 & 203\\ \hline
   \multicolumn{8}{c}{Aperture polarimetry at 1.25-m telescope of the
   Crimean Astrophysical Observatory}\\ \hline
   Nov. 17.765 & {\it UBV} & 0.996 & 0.261 & 80.8 & 64.4 & 30 & 189 \\
   Nov. 21.719 & {\it UBV} & 0.930 & 0.268 & 94.5 & 57.3 & 30 & 194 \\
   Nov. 22.747 & {\it UBV} & 0.913 & 0.271 & 98.0 & 55.8 & 30 & 196 \\
   Nov. 23.728 & {\it UBV }& 0.896 & 0.275 & 101.4 & 54.4 & 30 & 199 \\ \hline
\end{tabular}
\end{table}