\begin{table}%t4
\caption{\label{params}Physical and wind properties of He~3--759 with respect
to HD~151804 and HD~152408, allowing for an uncertainty in absolute 
magnitude of $\pm$0.5$^{\rm m}$. Clumped mass-loss rates are quoted 
here for volume filling factors of $f=0.1$.} 
%\centerline
{
\small
\begin{tabular}{cccl}
\hline\hline
Star & He~3--759 & HD~151804 & HD~152408 \\
     & O8~Iaf   & O8~Iaf    & WN9ha \\
\hline
$T_{*}$ (kK) & 30.5 & 29.0  & 31.8   \\
$R_{\ast}$ ($R_{\odot}$) & $\rm 32.1^{+8.3}_{-6.6}$ & 35.4 & 32.1  \\
$T_{2/3}$ (kK) &  29.3   & 28.1   &  31.3  \\
$\log L/L_{\odot}$ & 5.90$\pm$0.20   & 5.90  & 5.98   \\
$v \sin i$ (km~s$^{-1}$) & 100 & 104 & 80 \\
$v_{\infty}$ (km~s$^{-1}$) & 1000 & 1445 & 970 \\
$\dot{M}$ ($M_{\odot}$~yr$^{-1}$) & 10$^{-5.17\pm0.15}$&
10$^{-5.20}$ & 10$^{-4.94}$ \\
$X_{\rm H}$ (\%) & 49 & 43   & 27  \\
$X_{\rm He}$ (\%) & 49 & 56  &72  \\
% $X_{\rm C}$ (\%) &  0.03 & 0.2:   & 0.05  \\
$X_{\rm N}$ (\%) &  0.3  & 0.25   & 0.6  \\
% $X_{\rm O}$ (\%) &  0.5  & 0.3   &  0.05 \\ 
$M_{K_{\rm s}}$ (mag) & --6.7$\pm$0.5 & --6.7  & --6.6 \\
\hline
\end{tabular}}
\par
\medskip
{\it Note}. Formal uncertainties in $T_{*}$ are $\pm$0.5 kK, while 
abundances are reliable to within $\pm$5\% (H and He) or a 
factor of two (N).
\end{table}