\begin{table}%t4
%\centering
\par
\caption{Individual angular diameter determinations
of Aldebaran
and combined values, in milliarcseconds.}
\label{table_dia}
\begin{tabular}{llll}
\hline
\hline
\noalign{\smallskip}
\multicolumn{2}{c}{Lunar occultations}&
\multicolumn{2}{c}{Interferometry}\\
\noalign{\smallskip}
\multicolumn{1}{c}{Obs.}&
\multicolumn{1}{c}{$\phi_{\rm UD}$}&
\multicolumn{1}{c}{Obs.}&
\multicolumn{1}{c}{$\phi_{\rm UD}$}\\
\hline
05-02-98 & $19.85\pm0.03$ & 12-01-02 & $20.36\pm0.13$ \\ 
06-11-98 & $20.18\pm0.25$ & 02-10-03 & $19.92\pm0.05$ \\
06-11-98 & $21.30\pm0.11$ &  \\
%06-11-98 & $21.30\pm0.11$ & (both     & $20.07\pm0.11$) \\
\hline
\noalign{\smallskip}
\multicolumn{4}{c}{Weighted averages}\\
\noalign{\smallskip}
%\hline
\multicolumn{2}{c}{$19.95\pm0.03$} &
\multicolumn{2}{c}{$19.98\pm0.05$}\\ 
\hline
\noalign{\smallskip}
\multicolumn{4}{c}{Adopted uniform-disk angular diameter}\\
%\noalign{\smallskip}
% & & & \\
\multicolumn{4}{c}{$19.96\pm0.03$} \\
\noalign{\smallskip}
\multicolumn{4}{c}{Adopted limb-darkened angular diameter}\\
% & & & \\
\multicolumn{4}{c}{$20.58\pm0.03$} \\
\noalign{\smallskip}
\noalign{\smallskip}
\hline
\end{tabular}
\end{table}