\begin{table}%t2
      \caption{Standard deviations $\sigma$ between two old catalogues 
      and numbers of sampled stars $N$.}
         \label{DistributionTable1}
      %\centering
\par
         \begin{tabular}{cccccccccc}
            \hline
            \hline
            $ID$ & $epoch$ & & 137 & 964 & 1437 & 1572 & 1603 & 1689 & 1843 \\
            & & & \multicolumn{7}{c}{$\sigma$}\\
            \hline
            1 & 137 &  & $---$ & 0.47 & 0.41 & 0.69 & 0.67 & 0.77 & 0.62 \\   
            2 & 964 &  & 901 & $---$ & 0.29 & 0.72 & 0.72 & 0.78 & 0.60 \\
            3 & 1437 &  & 860 & 861 & $---$ & 0.66 & 0.68 & 0.72 & 0.55 \\
            4 & 1572 & $N$ & 584 & 585 & 575 & $---$ & 0.40 & 0.54 & 0.65 \\
            5 & 1603 &  & 709 & 706 & 699 & 593 & $---$ & 0.59 & 0.65 \\
            6 & 1689 &  & 688 & 688 & 680 & 602 & 832 & $---$ & 0.67 \\
            7 & 1843 &  & 792 & 793 & 780 & 644 & 878 & 952 &  $---$   \\              
            \hline
         \end{tabular} 
   \end{table}