\begin{table}%t6
\caption{\label{tab:evol40Dra}Orbital elements of 40 Dra in 1986--1994 and 2001.}
%\centering
\par
\begin{tabular}{lcccc}
\hline\hline
Element &   \multicolumn{2}{c}{1986--1994}   & \multicolumn{2}{c}{2001}  \\
        & Value & Error                &  Value & Error \\
\hline
$P$, days      & 10.52785    & 0.0020  &  10.52785    & *  \\
$T$, JD        &   48~000.008 & 0.011   & 52~053.260     & 0.040   \\
$e$            &       0.374 &   0.003 &       0.380   &   0.008 \\   
$\omega$, deg &     246.2   &   0.4   &       244.35  &     1.33 \\   
$K_1$, km~s$^{-1}$    &      39.14  &   0.14  &        39.01  &     0.39 \\   
$K_2$, km~s$^{-1}$    &      42.91  &   0.17  &        42.86  &     0.43 \\   
$V_0$, km~s$^{-1}$    &       5.76  &   0.07  &         5.31  &     0.19  \\ 
\hline
\end{tabular}
\end{table}