\begin{table}%t2
\caption{\label{Table2}Orbital elements ($a$, $e$, $i$) and some physical parameters ($\Delta v_{\min}$ and $\delta v_{\min}$, and $S'$) for each observed object$^{a}$.}
\par
%\centerline
{
\begin{tabular}{l c c c c c c c}
\hline\hline
Object & $a$ & $e$ & $i$ & $q$ & $\Delta\upsilon_{\min}$  & $\delta v_{\min}$ & \textit{S'}\\ \hline
1995 SM$_{55}$ & 41.685 & 0.102 &27.1 &37.435 & 149.7 & 123.3 & --0.9 $\pm$ 2.0 \\  
2003 OP$_{32}$ & 43.366 & 0.109 &27.2 &38.658 & 123.3 & 91.4 & 1.7 $\pm$ 2.0 \\  
2003 UZ$_{117}$& 44.062 &0.128  &27.5 &38.411 & 66.8 & 60.8 & --2.1 $\pm$ 2.0 \\  
2004 SB$_{60}$ & 42.082 &0.108  &23.9 &37.536 & 221.0 & 218.5 & 12.6 $\pm$ 2.0\\ 
2005 UQ$_{513}$& 43.291 &0.151 &25.7 &36.763 & 199.2 & 39.0 & 18.1 $\pm$ 2.0 \\  \hline
\end{tabular}}
\medskip
\par
$^{a}$ $a$: semi-major axis [AU]; $e$: eccentricity; $i$: inclination [$^{\circ}$]; $q$: perihelion distance [AU]; $\Delta v_{\min}$ and $\delta v_{\min}$ [m s$^{-1}$]: velocities from Ragozzine \& Brown (\cite{Ragozzine}); $S'$: the spectral gradient.
\end{table}