\begin{table}%t1
\caption{\label{NAC_filt}Summary of the observations of 21 Lutetia obtained with the OSIRIS-NAC using 12 filters.}\vspace{-3mm}
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\par
\begin{tabular}{cccccc}
\noalign{\smallskip\smallskip}
\hline
\hline
\noalign{\smallskip}
Code & Name & $\bar{\lambda}$ & $\Delta \lambda$ & $\tau$ & $N_{\rm obs}$ \\
\hline\noalign{\smallskip}
F16 & FFP-UV\/NEAR\_UV & 367.6 & 36.7 & 600 & 26 \\
F24 & FFP-VIS\/BLUE & 479.9 & 74.0 & 90 & 26 \\
F23 & FFP-VIS\/GREEN & 536.4 & 64.5 & 90 & 26 \\  
F22 & FFP-VIS\/ORANGE & 648.6 & 85.2 & 90 & 26 \\ 
F28 & FFP-VIS\/RED & 742.4 & 63.2 & 90 & 26 \\
F51 & ORTHO\/FFP-IR & 804.7 & 40.6 & 240 & 26 \\ 
F41 & NEAR\_IR\/FFP-IR & 880.1 & 63.6 & 210 & 26 \\
F15 & FFP-UV\/FAR\_UV & 270.7 & 47.0 & 600 &  2 \\
F27 & FFP-VIS\/HYDRA & 701.2 & 22.0 & 300 &  2 \\
F61 & OLIVINE/FFP-IR & 931.7 & 34.7 & 600 &  2 \\
F71 & IR/FFP-IR & 986.1 & 34.5 & 600 &  2 \\
F58 & ORTHO/RED & 790.1 & 26.3 & 600 &  2 \\ 
\hline 
\end{tabular}
\tablefoot{$\bar{\lambda}$ = mean wavelength (nm),
$\Delta \lambda$ = equivalent width (nm),
$\tau$ = exposure time (s),
$N_{\rm obs}$ = number of images.}\vspace{3mm}
\end{table}