\begin{table}%t4
\caption{\label{least}Results of the least square solution of the O--C data of V711~Tau.}
%\centering
\par
\begin{tabular}{cc}
\hline\hline \noalign{\smallskip}
Parameter & Value\\
\hline \noalign{\smallskip}
$T^{\rm max}$ (orbit)  & JD~2~442~764.012 $\pm$ 0.012\\
$P$ (orbit)  & 2.8376658 $\pm$ 0.0000039 d\\
$T^{\rm max}$ (long-term) & JD~2~448~195 $\pm$ 134\\
$P$ (long-term)  &  36.3 $\pm$ 1.9 yr\\
(O--C) amplitude   & 0.083 $\pm$ 0.005 d\\
\hline
\end{tabular}
\end{table}