\begin{table}%t4
\caption{Observed minus calculated statistics for 134340 Pluto \mbox{observations}.}\label{tab4}
%\centering
\small
\begin{tabular}{lcccc}
\hline\hline
Telescopes   &  $\overline{\rm (O-C)}_\alpha$&  $\overline{\rm (O-C)}_\delta$ & ${N}_{\rm obs}$ & $\overline{N}_{\rm stars}$\\
             &   $\sigma_{\alpha}$       &  $\sigma_{\alpha}$         &             &                       \\
\hline
1.60 m       &   0$\farcs$006            &  0$\farcs$007              & 641         &   22                   \\
             &   0$\farcs$025            &  0$\farcs$021              &             &                         \\\\
0.60 m       &   0$\farcs$018            &  0$\farcs$015              & 467         &   84                     \\
             &   0$\farcs$040            &  0$\farcs$038              &             &                           \\
             \hline
Final result &   0$\farcs$011            &  0$\farcs$010              & 1108        &   48                       \\
             &   0$\farcs$033            &  0$\farcs$030              &             &                             \\
             \hline             
\end{tabular}
\end{table}