\begin{table}%t2
\caption{Accuracy of the ephemerides of the Galilean satellites in mas.}\label{table2}
%\centering
\small                        
\begin{tabular}{c c c c c c}        
\hline\hline                  
Model & Satellite & Internal & External & Observational & Accuracy of the ephemerides on the \\ 
      &            &precision &accuracy $(1\sigma)$ &period & period 1985$-$2017 (max deviation) \\  \hline                         
Lainey L1 & J1 & 3 & 60 &1891$-$2003 &  25 \\ 
          & J2 & 8 & 60 &1891$-$2003 &  40 \\     
          & J3 & 6 & 60 &1891$-$2003 &  50 \\
          & J4 &13 & 60 &1891$-$2003 &  50 \\
\hline 
Arlot G5  & J1 & 3 & 90 &1891$-$1978 & 120 \\
          & J2 & 3 &100 &1891$-$1978 & 120 \\     
          & J3 & 3 &100 &1891$-$1978 & 120 \\
          & J4 & 3 &130 &1891$-$1978 & 120 \\
\hline                                    
\end{tabular}
\end{table}