\begin{table}%t3
\caption{\label{t3}Description of spectral observations of 21 Lutetia.}
%\centering
\par
\begin{tabular}{cccccccc} 
\hline\hline\noalign{\smallskip}
 Date &  UT-start  & $T_{\rm exp}$ & Tel. & Instr. & Grism & Airm. &
Solar  \\
 & (hh:mm) & (s) & & &   & & analog \\ \hline
2004 11 04 & 23:35 & 40 &  TNG & DOLORES & LR-R & 1.05 & 1 \\
2004 11 15 & 23:37 & 40 &  TNG & DOLORES & MR-B & 1.05 & 1 \\
2004 11 16 & 01:10 & 40 &  TNG & DOLORES & LR-R & 1.11 & 1 \\
2004 11 16 & 01:12 & 40 &  TNG & DOLORES & MR-B & 1.11 & 1 \\
2004 11 16 & 03:06 & 40 &  TNG & DOLORES & LR-R & 1.50 & 1 \\
2004 11 16  & 03:08 & 40 &  TNG & DOLORES & MR-B & 1.51 & 1 \\
2004 11 18  & 23:11 & 60 & TNG & NICS & AMICI   & 1.05  &1 \\
2007 01 20 & 08:47 & 120 & NTT & EMMI & GR1 & 1.55 & 2 \\
2007 01 20& 08:42 & 240 & NTT & EMMI & GR5 & 1.58 & 2 \\
\hline
\end{tabular}
\tablefoot{1. Hyades64 (airmass 1.03). 2. La102-1081 (airmass 1.22).}
\end{table}