\begin{table}%T5
%\centering
\par
\caption{The orbital phase of minimum light for
         those seasons of the available data where the $V$ amplitude
         was large enough to allow an accurate determination.
         The first column gives the mean equinox of all the observations
         in each season. The second column gives the activity cycle phase
         derived from the ephemeris in Eq.~(\ref{eq:activityphase}). The fourth
         column gives the orbital phase drift of minimum light from the
         previous season (this season minus previous season) in units of
         $\mbox{phase yr}^{-1}$.}
\label{tab:phasedrift}
\begin{tabular}{llll}
\hline\hline
Mean&Activity&Phase&Phase\\
equinox&phase $\varphi_{\rm a}$&of $V_{\rm min}$&drift ($\mbox{yr}^{-1}$)\\
\hline
1972.19&0.134&--&--\\
1972.79&0.158&0.7335&--\\
1974.95&0.246&--&--\\
1975.99&0.289&--&--\\
1976.86&0.324&--&--\\
1979.94&0.450&--&--\\
1981.99&0.534&0.6414&--\\
1983.00&0.575&0.6111&$-$0.0300\\
1984.10&0.620&0.6388&$+$0.0252\\
1984.95&0.654&0.5534&$-$0.1005\\
1985.85&0.691&0.6001&$+$0.0519\\
1987.11&0.743&0.5892&$-$0.0087\\
1988.00&0.779&0.5456&$-$0.0490\\
1988.94&0.817&0.4368&$-$0.1157\\
1989.94&0.858&0.4036&$-$0.0332\\
1991.01&0.902&--&--\\
1992.94&0.981&0.7694&--\\
1993.96&0.022&0.6606&$-$0.1067\\
1995.01&0.065&0.5511&$-$0.1043\\
1995.93&0.103&0.7908&$+$0.2605\\
1997.03&0.148&0.7808&$-$0.0091\\
1997.95&0.185&0.6912&$-$0.0974\\
1998.95&0.226&0.6513&$-$0.0399\\
1999.93&0.266&0.6603&$+$0.0092\\
2000.95&0.308&--&--\\
2001.90&0.346&--&--\\
\hline
\end{tabular}
\end{table}