\begin{table}%[ht]%T2
\caption{Longitudes in degrees of $V_{\max}$ and $V_{\rm min}$ for Europa.}
\label{T:theta}
%\catcode`\#=\active \def#{\hphantom{$^a$}}
%\centerline
{
\begin{tabular}{rrl}
\hline\hline
%\noalign{\smallskip}
  \hfil$\theta_{\rm max}$\hfil & \hfil$\theta_{\rm min}$\hfil & \hfil Reference\hfil \\
%\noalign{\smallskip}
\hline
 100 & 280 & Harris (\cite{harris61}) \\
  90 & 300 & Johnson (\cite{johnson71}) \\
  45 & 280 & Blanco \& Catalano (\cite{blanco74}) \\
  80 & 280 & Morrison et~al. (\cite{morrison74}) \\
$\sim$90 & $\sim$290 & Millis \& Thompson (\cite{millis75}) \\
  75$^a$ & 285$^a$ & Morrison \& Morrison (\cite{morrison77}) \\
  95 & 295 & Domingue et~al. (\cite{domingue91})\\
  85 & 295 & Present work\\
\hline
\end{tabular}}
\par
\smallskip
$^a$ Synthetic data.
\end{table}