\begin{table}%t4
%\centering
\par
\caption
{Secular variations of the lunar arguments fit to DE406: 
two different determinations. 
Units: coefficients in arcsecond; time in century.\label{tab4}
}
\begin{tabular}{lcccccc} 
\hline \hline
Test1 
           & $w_1^{(3)}$  & $w_1^{(4)}$   & $w_2^{(2)}$ & $w_2^{(3)}$ 
           & $w_3^{(2)}$  & $w_3^{(3)}$   \\
ELPa       & $-$0.000605  & $-$0.00001470 &$-$0.0002    & $-$0.000340 
           & $-$0.0026    & $-$0.000126   \\
ELP/MPP02  & $-$0.000189  & $-$0.00001024 &+0.0047      & $-$0.000252 
           & $-$0.0026    & $-$0.000107   \\
\hline  
Test2 
           & $w_1^{(4)}$  & $w_1^{(5)}$  & $w_2^{(3)}$  & $w_2^{(4)}$ 
           & $w_3^{(3)}$  & $w_3^{(4)}$  \\
ELPa       & +0.00001499  & +0.00000036  & $-$0.000306  &+0.00000064   
           &+0.000058     & +0.00000281  \\
ELP/MPP02  &$-$0.00000107 &+0.00000011   &$-$0.000523   &$-$0.00000369 
           &+0.000043     &+0.00000204   \\
\hline
\end{tabular}
\end{table}