\begin{table}%t3
 \caption{Comparison of orbit models with flyby observations. Positive along-track offsets indicate that Phobos is ahead of its predicted \mbox{position}.}  \label{tab:ModelsOffsets}
%\centering
\small
 \begin{tabular}{c c c }
 \hline \hline
Orbit Model & Along-track offsets & Across-track offsets\\
\hline     
ROB-model & +1.5 km & $\pm$0.3 km \\
JPL-model & +2.6 km & $\pm$0.5 km\\
\hline
 \end{tabular}
\end{table}