\begin{table}%t2
\caption{Parameters for \object{HM~Sge} deduced from the best-fit {\tt DUSTY} model to the spectrophotometric and interferometric data.}
\label{tab_hm_sge_dusty_1shell}
\par
%\centerline
 {
\begin{tabular}{cc} 
\hline
\hline
Parameter & Value \\ 
\hline
Effective temperature (K)  & 3000 \\ 
Central star diameter (mas) & 1.6 \\
Luminosity ($L_{\odot}$) & 5000 \\
Distance (kpc) & 1.5 \\
Shell inner radius: $\varepsilon_{\rm in}$ (mas)  & 3.6 \\
Inner boundary temperature (K)  & 1600 \\
Grain chemical composition  & 100$\%$ Sil-Ow$^1$\\
Density power law coefficient  & 2.2 \\
Grain size distribution  & MRN$^2$ \\
Geometrical thickness ($\varepsilon_{\rm in}$)& 1000 \\
Visual optical depth & 25.2 \\
10 $\mu$m optical depth & 2.15 \\
\hline
\end{tabular}}
\par
$^1$ {Sil-Ow stands for ``warm'' silicates of \citet{ossenkopf92}.}\\
$^2$ {Grain size distribution as described by \citet{mathis77}.}\\
\end{table}