\begin{table}%t2
\caption{\label{kinem_tab}Kinematic and orbital parameters of the sub-system of open~clusters
in the Galaxy.}
%\centering
\par
\begin{tabular}{lcc}
\hline\hline
Parameter                   &Value&rms error\\
\hline                                                     
$U_\odot$,~km~s$^{-1}$      	       &$+ 9.44    $&$1.14   $\\
$V_\odot$,~km~s$^{-1}$      	       &$+11.90    $&$0.72   $\\
$W_\odot$,~km~s$^{-1}$      	       &$ +7.20    $&$0.42   $\\
$\sigma_U$,~km~s$^{-1}$               &$ 13.86    $&$0.81   $\\
$\sigma_V$,~km~s$^{-1}$               &$  8.75    $&$0.51   $\\
$\sigma_W$,~km~s$^{-1}$               &$  5.05    $&$0.30   $\\
$\sigma_U$:$\sigma_V $:$ \sigma_W$&$1 $:$ 0.63$:$ 0.36$&$  $\\
$\overline{R_{\rm a}}$,~kpc          &$ 8.631   $&$0.034   $\\
$\sigma_{R_{\rm a}}$,~kpc            &$ 0.427   $&$0.024   $\\
$\overline{R_{\rm p}}$,~kpc          &$ 6.706   $&$0.056   $\\
$\sigma_{R_{\rm p}}$,~kpc            &$ 0.682   $&$0.040   $\\
$\overline{Z_{\rm max}}$,~kpc      &$ 0.260   $&$0.016   $\\
$\sigma_{Z_{\rm max}}$,~kpc        &$ 0.189   $&$0.011   $\\
$\overline e$                  &$ 0.127   $&$0.003   $\\
$\sigma_{\rm e}$                     &$ 0.037   $&$0.002   $\\
$A$,~km~s$^{-1}$~kpc$^{-1}$                  &$+14.5$   &$0.8$   \\
$B$,~km~s$^{-1}$~kpc$^{-1}$                  &$-13.0$   &$1.1$   \\
\hline
\end{tabular}
\end{table}