\begin{table}%t1
\caption{Accuracy of the ephemerides of the Martian satellites in mas.}\label{table1}
%\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 1988$-$2017 (max deviation) \\  \hline                       
Lainey             & Phobos & 0.1 &  3 & 1877$-$2005 &   24 \\ 
                   & Deimos & 0.1 &  3 & 1877$-$2005 &   60 \\  
\hline 
Kudryavtsev (1997) & Phobos & 0.6 &  6 & 1877$-$1988 &   60 \\
                   & Deimos & 0.6 & 24 & 1877$-$1988 &  600 \\
\hline 
Chapront-Touz\'e   & Phobos & 0.5 & 10 & 1877$-$1988 &  600 \\
                   & Deimos & 3   & 30 & 1877$-$1988 & 1000 \\
\hline                                  
\end{tabular}
\end{table}