\begin{table}%t3
%\centering
\par
\caption{Heliocentric velocities of the main moving groups according to (1) \citet{dehnen98} and (2) \citet[ and references therein]{eggen71,eggen96}.}\label{t_groups}
\small
 \begin{tabular}{lrrrr}
\hline\hline
 &\multicolumn{2}{c}{(1)}& \multicolumn{2}{c}{(2)}\\
 Moving group&\multicolumn{1}{c}{$U$}&\multicolumn{1}{c}{$V$}&\multicolumn{1}{c}{$U$}&\multicolumn{1}{c}{$V$}\\
&  {($\kms$)}&  {($\kms$)}&  {($\kms$)}&  {($\kms$)}\\
\hline
1 Pleiades (Stream 0) &$-12$   &$-22$    &$-11.6$ &$-20.7$\\
2 Hyades (Stream I)   &$-40$   &$-20$    &$-40.4$ &$-16.0$\\
3 Sirius (Stream II)  &$ 9 $   & $ 3 $   &$14.9$  &$1.4$\\
4 Coma Berenices      &$-10$   & $-5$    &      &\\
5 NGC 1901            &$-25$   &$-10$    &$-26.4$ &$-10.4$\\
6 HR1614              &$ 15$   &$-60$    &$5.8$   &$-59.6$\\
7                     &$ 20$   &$-20$    &      &\\
8                     &$-40$   &$-50$    &      &\\
9                     &$-25$   &$-50$    &      &\\
10                    &$ 50$   &$  0$    &      &\\
11                    &$ 50$   &$-25 $   &      &\\
12~IC~2391            &      &       &$-20.8$ &$-15.9$\\
13                    &$-70$   &$-10$    &      &\\
14                    &$-70$   &$-50$    &      &\\
15~61~Cygni           &      &       &$-80$   &$-53$\\
16 $\zeta$ Herculis   &      &       &$-30$   &$-50$\\
17~Wolf~630           &      &       &$25 $   &$-33$\\
\hline
\end{tabular}
\end{table}