\begin{table}%t3
\caption {\label{tab3}\textit{K}s-band photometry of the selected objects, using 2MASS stars as reference.}             % title of Table
%\centering
                          % used for centering table
\begin{tabular}{c c c c}        % centered columns (4 columns)
\hline\hline                 % inserts double horizontal lines
Object &                       &      Date (2008)      &            \\    % table heading 
       &   4.08 Jun.             &  7.09 Jun.              &  3.04 Aug.   \\ 
\hline                        % inserts single horizontal line
A      & $18.08\pm0.11$ & $18.05\pm0.12$ & $18.13\pm0.16$ \\
B      & $18.18\pm0.11$ & $18.16\pm0.12$ & $18.42\pm0.16$ \\
C      & $19.28\pm0.12$ & $19.32\pm0.13$ & $19.12\pm0.19$ \\
E      & $19.57\pm0.12$ & $19.50\pm0.13$ & $19.65\pm0.20$ \\
F      & $20.10\pm0.14$ & --             &  --            \\
\hline                                 %inserts single line
\end{tabular} 
\end{table}