\begin{table}%f1
%\centering
\par
\caption{Orbit of Caliban from 47 obs. 1984--1998.\label{tab1}} 
\begin{tabular}{ccc}\hline\hline
Epoch & 1999 Jan. 22.0 TT\\
 & Model 1 & Model 2 \\\hline
$T$ & 1998 Apr. 18.729 & Apr. 18.709\\
$\omega$ & 338.792 & 338.780\\
$\Omega$ & 175.070 & 175.071\\
$I$ & 139.697 & 139.697\\
$q$ & 0.0439947 & 0.0439950\\
$e$ & 0.0814373 & 0.0814311\\
rms & $0''$63 & $0''$63\\\hline
\end{tabular} 
\end{table}