\begin{table}%t3
%\centering
\par
\caption{Orbital and physical characteristics of 21 Lutetia.}
\label{tab3}
\begin{tabular}{ll}
\hline
\hline
Semimajor axis (AU)             & 2.435 \\
Eccentricity                    & 0.164 \\
Inclination (deg)               & 3.064 \\
Taxonomic type                  & C (or M) \\
Synodical rotation period (h) & $8.17 \pm 0.01$ \\
Absolute magnitude              & 7.294 \\
Slope parameter                 & 0.110 \\
IRAS D (km)                     & $95.5 \pm 4.1$ \\
IRAS albedo                     & $0.221 \pm 0.20$ \\
\hline
Pole solution from radar observations (Magri et~al. \cite{mag}):    & \\
$\lambda_1=228^{\circ}\pm11^{\circ}$  ~$\beta_1=+13^{\circ}\pm5^{\circ}$ 
& $\lambda_2=48^{\circ}\pm11^{\circ}$ ~$\beta_2=+5^{\circ}\pm5^{\circ}$\\
Sense of rotation                & Prograde \\
$2a \times 2b \times 2c$                            & 130 $\times$ 104 $\times$ 74 km\\
\hline
Pole solution from lightcurve analysis (Torppa et~al. \cite{torppa}):  & \\
 $\lambda_1=220^{\circ}\pm10^{\circ}$  ~$\beta_1=+3^{\circ}\pm10^{\circ}$ 
& $\lambda_2=39^{\circ}\pm10^{\circ}$ ~$\beta_2=+3^{\circ}\pm10^{\circ}$ \\
 $a/b=1.2$; $b/c=1.2$                              & \\
\hline
\end{tabular}
\end{table}