\begin{table}%T1
%\centering
\par
   \caption{Observational conditions for 2867 Steins. The exposure time (exp) is the same for each of the four images obtained at the four different $\lambda/2$ retarder plate positions, while nset represents the number of repetitions of the full polarimetric sequences. Data on the position angle of the scattering plane ($\phi$), on the phase angle ($\alpha$), on the heliocentric ($r$) and geocentric ($\Delta$) distances of Steins have been taken from the JPL ephemeris service ({\tt http://ssd.jpl.nasa.gov/cgi-bin/eph}).}
\label{tab1}
\begin{tabular}{lccccccccllc} \hline\hline
DATE & UT & Fil. &  exp (s) & nset  & $m_{v}$ & airm & $\phi$ ($^{\circ}$)  & $\alpha$ ($^{\circ}$) & $r$ (AU) & $\Delta$ (AU) & seeing ($''$) \\ \hline
11 Jun. 05 & 08:50 & $R$ & 33 & 3 & 16.45 & 1.05 & 252.6 & 28.3 & 2.0201 & 1.4315 & 1.45 \\
11 Jun. 05 & 09:08 & $V$ & 35 & 3 & 16.45 & 1.02 & 252.6 & 28.3 & 2.0201 & 1.4315 & 1.35 \\
01 Jul. 05 & 09:23 & $R$ & 26 & 3 & 16.06 & 1.02 & 258.2 & 24.3 & 2.0197 & 1.2563 & 0.55 \\
01 Jul. 05 & 09:40 & $V$ & 26 & 3 & 16.06 & 1.03 & 258.2 & 24.3 & 2.0197 & 1.2563 & 0.54 \\
14 Jul. 05 & 05:43 & $R$ & 15 & 3 & 15.78 & 1.17 & 265.0 & 20.6 & 2.0217 & 1.1653 & 0.80 \\
14 Jul. 05 & 05:58 & $V$ & 15 & 4 & 15.78 & 1.12 & 265.0 & 20.6 & 2.0217 & 1.1653 & 0.99 \\
06 Aug. 05 & 04:16 & $R$ & 15 & 3 & 15.31 & 1.13 & 294.1 & 12.3 & 2.0295 & 1.0654 & 0.60 \\
06 Aug. 05 & 04:31 & $V$ & 15 & 4 & 15.31 & 1.10 & 294.2 & 12.3 & 2.0295 & 1.0654 & 0.55 \\
09 Aug. 05 & 07:56 & $R$ & 10 & 4 & 15.26 & 1.09 & 301.7 & 11.3 & 2.0310 & 1.0594 & 0.74 \\
09 Aug. 05 & 08:14 & $V$ & 10 & 4 & 15.26 & 1.12 & 301.7 & 11.3 & 2.0310 & 1.0594 & 0.71 \\
13 Aug. 05 & 07:49 & $R$ & 10 & 4 & 15.22 & 1.10 & 313.2 & 10.3 & 2.0330 & 1.0547 & 2.10 \\
13 Aug. 05 & 08:16 & $V$ & 10 & 4 & 15.22 & 1.16 & 313.2 & 10.3 & 2.0330 & 1.0547 & 1.94  \\
\hline
      \end{tabular}
       \end{table}