\begin{table}%t2
      \caption{\label{tab2}Extract of the CPMDS catalogue of common proper motion double stars with angular separations smaller than 2$\arcmin$.}
%\centerline
{\small
\par
\begin{tabular}{rrrrrrccrrrrrrrrrrrrrrrrrrrlrc}
\hline\hline
\multicolumn{3}{ c}{$\alpha_{2000}$} &
\multicolumn{3}{  c}{$\delta_{2000}$} &
\multicolumn{2}{  c}{Identification} &
\multicolumn{1}{  c }{$\rho$} &
\multicolumn{1}{  c}{$\sigma_{\rho}$} &
\multicolumn{1}{  c }{$\theta$} &
\multicolumn{1}{  c}{$\sigma_{\theta}$} &
\multicolumn{1}{  c }{$Mag P $} &
\multicolumn{1}{  c}{$Mag S $} &
\multicolumn{1}{  c}{$\mu^*_{\alpha} P$} &
\multicolumn{1}{  c}{$\mu_{\delta} P$} &
\multicolumn{1}{  c}{$\sigma_{\mu^*_\alpha} P$} &
\multicolumn{1}{  c}{$\sigma_{\mu_\delta} P$} &
\multicolumn{2}{  c}{No} &
\multicolumn{1}{  c}{$\mu^*_{\alpha} S$} &
\multicolumn{1}{  c}{$\mu_{\delta} S$} &
\multicolumn{1}{  c}{$\sigma_{\mu^*_\alpha} S$} &
\multicolumn{1}{  c}{$\sigma_{\mu_\delta} S$} &
\multicolumn{2}{  c}{No}&
\multicolumn{1}{  c}{Epoch}&
\multicolumn{1}{  c}{Class}&
\multicolumn{1}{  c}{$\beta$}  \\
\hline
\multicolumn{1}{ c}{h} &
\multicolumn{1}{  c}{m} &
\multicolumn{1}{  c}{s} &
\multicolumn{1}{ c}{\degr} &
\multicolumn{1}{  c}{\arcmin} &
\multicolumn{1}{  c}{\arcsec} &
\multicolumn{1}{ c}{} &
\multicolumn{1}{  c}{} &
\multicolumn{2}{  c}{\arcsec} &
\multicolumn{2}{  c}{\degr} &
\multicolumn{2}{  c}{mag.} &
\multicolumn{4}{  c}{mas/yr} &
\multicolumn{2}{  c}{ } &
\multicolumn{4}{  c}{mas/yr} &
\multicolumn{2}{  c}{ } &
\multicolumn{1}{  c}{ yr} &
\multicolumn{1}{  c}{ } &
\multicolumn{1}{  c}{ }
\\ \hline
 0 & 2 & 20.009 & +16 & 08 & 46.97 &  1692   & 1685 &  30.58 & 0.06 & 185.82 & 0.10 &  15.427 & 15.781 &   19.5 &  $-$12.5 & 4.8 &  3.8 & 7& 8 &   21.6 &  $-$15.4 & 3.8 & 3.9 & 6 & 6 &  1994.94 & I & 0.35\\
 0 &  2 & 46.393 & +16 & 47  &   8.27 &    2010   & 1993 &  77.72 & 0.06 & 335.41 & 0.04 &  15.464 & 15.697   & 16.1 &  $-$25.5 & 4.4 & 3.6 & 9 & 8   & 13.9  & $-$23.1 & 4.0 & 5.2 & 4 & 3  & 1994.94 & II & 0.19\\
 0 & 3 & 44.683 & +11 & 33 & 34.22 &    2710  &  2680  & 76.30 & 0.07 & 335.59 & 0.05 &  15.490 & 16.088  &  17.5  & $-$11.6 & 4.7 & 3.6 & 6 & 7  &  14.3  & $-$14.4 & 3.8 & 3.9 & 4 & 4  & 1992.78 & I & 0.44\\
 0 & 5 & 24.297 & +16 &19  &44.44 &  3857  &  3820     &   89.14 & 0.04 & 336.94 & 0.02 &   8.770  & 8.982 &   33.9 &  $-$31.3 &  2.1 &  2.1 & 9 & 9 &   34.9 &  $-$30.1 &  2.1 &  2.1 & 9 & 9 &  1996.57 & I &0.01\\
 0 &12 & 34.144 & +11& 18 & 0.44 &   8713 & 8668 &  79.13 & 0.05 & 253.32 & 0.04 &  15.007 & 15.597 &  $-$10.7 &  $-$12.3 & 3.5 &  3.5 & 9 & 9 &  $-$13.6 &  $-14.3$ & 3.5 & 3.5 & 7 & 8 &  1995.18 & I & 0.60\\
 0 & 13 & 41.298 & +15 & 37 & 1.46 &   9457 & 9535 &  96.90 & 0.06 & 115.02 & 0.04 &  15.038 & 16.107 &   18.2 &   $-$20.5 & 3.5 & 3.6 & 9 & 9  &  19.7 &  $-$19.0 &  3.8 & 3.9 &  4 & 4 &  1993.95 & II& 0.03\\
0 & 14 & 23.006  &+16 & 42 & 59.12  &  9941 & 9955 & 95.29 & 0.06  & 12.97  & 0.03  & 15.906 &16.347  &  11.7 &   $-$15.3 &  3.6 &  3.7 &  4 & 4 &   14.2 &   $-$14.8 & 3.6 &  3.7 &  4 & 4 &  1995.72 & I &0.05\\
\hline
\end{tabular}}
%\end{table}