\begin{table}%t3
\caption{\label{Tab_ElPiza}Polarization measurements of \centotrentatre.}
%\centering
\par
\small\begin{tabular}{ccrrrrcrcc}
\hline\hline\noalign{\smallskip}
\multicolumn{1}{c}{Date}   &
\multicolumn{1}{c}{UT\tablefootmark{(1)}}  &
\multicolumn{1}{c}{Exp}    &
\multicolumn{1}{c}{PA\tablefootmark{(2)}}     &
\multicolumn{1}{c}{Phase Angle}  &
\multicolumn{1}{c}{$t-t_0$\tablefootmark{(3)}}   &
\multicolumn{1}{c}{Filter} &
\multicolumn{1}{c}{Ap.\tablefootmark{(4)}}&
\multicolumn{1}{c}{\pq}    &
\multicolumn{1}{c}{\pu}    \\
\multicolumn{1}{c}{yyyy mm dd}   &
\multicolumn{1}{c}{hh:mm}  &
\multicolumn{1}{c}{(s)}    &
\multicolumn{1}{c}{($^\circ$)}     &
\multicolumn{1}{c}{($^\circ$)}     &
\multicolumn{1}{c}{(days)} &
\multicolumn{1}{c}{}       &
\multicolumn{1}{c}{pix.}   &
\multicolumn{1}{c}{(\%)}   &
\multicolumn{1}{c}{(\%)}  \\
\hline                      
2007 05 22 & 09:44 &  960 & 256.160 & 19.690 & $-$37.66 & $R$ & 7.0 & $0.96\pm0.59$ & $  0.10\pm 0.59$\\
 2007 05 22 &09:17 &  960& 256.162& 19.693 & $-$37.68 &$V$& 7.0&$  0.85\pm 0.55$&$ -0.01\pm 0.56$\\[2mm]
 2007 07 13 &07:43 &  960& 247.877&  3.331 & $+$14.25 &$R$& 5.0&$ -0.75\pm 0.16$&$ -0.39\pm 0.16$\\
 2007 07 13 &07:13 &  960& 247.905&  3.340 & $+$14.23 &$V$& 5.0&$ -1.27\pm 0.15$&$ -0.10\pm 0.16$\\[2mm]
 2007 07 17 &07:05 &  960& 237.251&  1.646 & $+$18.22 &$R$& 7.0&$ -0.53\pm 0.16$&$ -0.16\pm 0.16$\\
 2007 07 17 &06:37 &  960& 237.360&  1.654 & $+$18.21 &$V$& 5.5&$ -0.53\pm 0.15$&$ -0.04\pm 0.15$\\[2mm]
 2007 08 01 &02:47 &  960&  85.710&  4.969 & $+$33.05 &$R$& 5.5&$ -1.17\pm 0.31$&$  0.02\pm 0.29$\\
 2007 08 01 &02:19 &  960&  85.720&  4.960 & $+$33.03 &$V$& 7.0&$ -0.50\pm 0.39$&$  0.09\pm 0.39$\\[2mm]
 2007 08 05 &04:58 & 1280&  84.169&  6.671 & $+$37.14 &$R$& 5.0&$ -1.28\pm 0.14$&$  0.26\pm 0.15$\\
 2007 08 05 &04:27 & 1280&  84.174&  6.662 & $+$37.12 &$V$& 6.0&$ -1.48\pm 0.15$&$ -0.14\pm 0.15$\\[2mm]
 2007 08 09 &01:09 &  960&  83.378&  8.215 & $+$40.98 &$R$& 5.0&$ -1.22\pm 0.17$&$  0.12\pm 0.17$\\
 2007 08 09 &00:42 &  960&  83.381&  8.207 & $+$40.96 &$V$& 5.0&$ -1.53\pm 0.18$&$  0.02\pm 0.18$\\[2mm]
 2007 08 30 &00:43 & 1280&  81.907& 15.330 & $+$61.96 &$R$& 6.0&$ -0.28\pm 0.46$&$  0.03\pm 0.48$\\
 2007 08 30 &00:13 & 1280&  81.908& 15.324 & $+$61.94 &$V$& 6.0&$ -0.51\pm 0.29$&$ -0.02\pm 0.30$\\[2mm]
 2007 09 19 &02:16 & 1200&  80.962& 19.611 & $+$82.02 &$R$& 6.0&$  0.33\pm 0.37$&$ -0.32\pm 0.36$\\
 2007 09 19 &01:48 & 1200&  80.963& 19.608 & $+$82.00 &$V$& 5.0&$  0.99\pm 0.39$&$  0.08\pm 0.37$\\[2mm]
 2007 09 24 &01:01 & 1280&  80.655& 20.288 & $+$86.97 &$R$& 7.0&$  1.63\pm 1.13$&$  0.27\pm 1.17$\\
 2007 09 24 &00:28 & 1280&  80.656& 20.285 & $+$86.95 &$V$& 6.5&$  1.94\pm 0.90$&$ -0.64\pm 0.88$\\
\hline
\end{tabular}
\tablefoot{
\tablefoottext{1}{Date and UT refers to the middle of the exposure series.}
\tablefoottext{2}{Position angle of the scattering plane.}
\tablefoottext{3}{Time from perihelion.}
\tablefoottext{4}{Aperture used for flux extraction, expressed in pixels (1 pixel =
0.25\arcsec).}}
\end{table}