\begin{table}%t8
%\centering
\par
\caption{Masses and radii. All numbers must be considered as rough estimates.}\label{tab:mass}
\small \begin{tabular}{lcc}
\hline \hline
 & \ka\  & \wrc\ \\
 \hline 
 Star:          &     &         \\    
Initial mass    & 150~...~200~$M_\odot$ & 100~...~150~$M_\odot$ \\
Current mass    &      ?                   & 45~...~55~$M_\odot$ \\
%\hline
H~{\sc ii} region:&    &  \\
Ionized gas     & $>$5~$M_\odot$   &  $>$10~$M_\odot$  \\   
Radius          & 0.6~...~6~pc & 0.6~...~6~pc \\
%\hline
PDR:            &             &         \\
H$_2$ mass      &  $>$0.8~$M_\odot$   & $>$0.7~$M_\odot$  \\
%\hline
Dust shell:     &                    &                   \\
Warm dust mass  & 0.005~$M_\odot$   &  0.08~$M_\odot$  \\
Inner radius    & 0.06~pc           & 0.07~pc  \\ 
Outer radius    & 0.4~pc            & 0.4~pc   \\  
 \hline    
\end{tabular}
\end{table}