\begin{table}%t3
\caption{\label{tab_diff}The Earth-Mars distance dependence on the orbital elements.}
\small%\centering
\par
\begin{tabular}{c c c l}
\hline
\hline\noalign{\smallskip}
& Earth & Mars & Units $\times 10^{-11}$\\
\hline\noalign{\smallskip}
max $\left\vert \frac{\partial D}{\partial a} \right\vert$ & 1.52 & 1.63 & m AU$^{-1}$ \\\noalign{\smallskip} 
max $\left\vert \frac{\partial D}{\partial \lambda} \right\vert$ & 1.52 & 1.87 & m rad$^{-1}$\\\noalign{\smallskip}
max $\left\vert \frac{\partial D}{\partial e} \right\vert$ & 3.03 & 3.56 &  m \\\noalign{\smallskip}
max $\left\vert \frac{\partial D}{\partial \varpi} \right\vert$ & 0.05 & 0.35 & m rad$^{-1}$\\\noalign{\smallskip}
max $\left\vert \frac{\partial D}{\partial i} \right\vert$ & 0.15 & 0.14 & m rad$^{-1}$\\\noalign{\smallskip}
max $\left\vert \frac{\partial D}{\partial \Omega} \right\vert$ & 0.00 & 0.01 & m rad$^{-1}$\\\noalign{\smallskip}
\hline 
\end{tabular}
\end{table}