\begin{table}%t5
%\centering
\par
\caption{Parameters of N~66 obtained by model fits to the observed 
spectra from the different epochs.
$\Delta(\log L)$ is the logarithm of the luminosity, relative to $\log
L/L_\odot = 4.78$. Apart from the luminosity scaling, only three
different models (A, B, C) are applied. The mass-loss rate is in the usual 
units, $M_{\odot}~ {\rm yr}^{-1}$.\label{table:variable-parameters}} 
\begin{tabular}{lcccrcr}
\hline \hline
Epoch 
& $\log \frac{R_{\rm t}}{R_\odot}$ 
& $v_\infty/\frac{\rm km}{\rm s}$ 
& Model\rule[-3mm]{0mm}{7mm} 
& $\Delta \log L$ 
& $\frac{R_\ast}{R_\odot}$ 
& $\log \dot M$\\ 
\hline %----------------------------------------------------------
1983.3 & 0.50 & 2200 & A & --0.20 & 0.52 & --5.66\rule{0cm}{2.4ex} \\
1986.3 & 0.50 & 2200 & A & --0.20 & 0.52 & --5.74 \\
1990.6 & 0.50 & 2200 & A & --0.20 & 0.52 & --5.74 \\
1993.9 & 0.45 & 2200 & B &  0.35 & 0.98 & --5.25 \\
1994.7 & 0.45 & 2200 & B &  0.65 & 1.38 & --5.02 \\
1995.0 & 0.45 & 2200 & B &  0.35 & 0.98 & --5.25 \\
1995.3 & 0.45 & 2200 & B &  0.45 & 1.09 & --5.17 \\
1995.7 & 0.50 & 2200 & A &  0.10 & 0.73 & --5.51 \\
1995.9 & 0.50 & 2200 & A &  0.20 & 0.82 & --5.44 \\
1996.0 & 0.50 & 2200 & A &  0.20 & 0.82 & --5.44 \\
1996.9 & 0.50 & 2200 & A &  0.10 & 0.73 & --5.51 \\
1999.0 & 0.50 & 1600 & C & --0.20 & 0.52 & --5.67 \\
2000.1 & 0.50 & 1600 & C & --0.20 & 0.52 & --5.67 \\
\hline 
\end{tabular}
\end{table}