\begin{table}%t1
%\centering
\par
\caption{\label{tab1}Main parameters of the subgroups of the Sco-Cen association.}
\small%\centering
\par
\begin{tabular}{lllllllllllllll}
\hline
\hline\noalign{\smallskip}
sub- &$l$      &$b$      &$\bar{d}$&$H$    &$\bar{V}_{r}$&$\bar{V}_{l}$&$\bar{V}_{b}$&$\tau$&$n_{\rm B}$&$n_{\rm B2.5}$ &$n_{\rm SN}$ &$n'_{\rm SN}$ &$n''_{\rm SN}$&M${\rm st}$ \\
group&($\degr$)&($\degr$)& ~pc &~pc        &\kms     &\kms     &\kms     &Myr   &  &         &  &     &   &(\msun)  \\  
(1)  &(2)      &  (3)    & (4) &(5)        &(6)      &(7)      & (8)     & (9)  &(10)&(11)&(12)&(13)   &(14)&(15)\\       
\hline
LCC & 285--312  & --10~+~21  & 118 & 30--40     & +4.2    & --1.6    & +1.4    & 11--12& 42&  7 & 1.3& 3~$\pm$~2& 6 &1300 \\
UCL & 312--343  &   0~+~25  & 140 & 50~$\pm$~20 & +7.0    & --1.6    & +1.6    & 14--15& 66& 17 & 3.5& 6~$\pm$~3&13 &2100 \\
US  & 343--360  & +10~+~30  & 145 & 50--60     & +5.5    & --0.3    & --0.9    &  4--5 & 49& 15 & 0.8& 1~$\pm$~1&1  &2350 \\
\hline
\end{tabular} \vspace{3mm}
\end{table}