\begin{table}%t1
\caption{\label{tab:dimensions}Observational parameters for DI~Her.}
%\centering
\par
\begin{tabular}{l c c}     
\hline\hline\noalign{\smallskip}
Parameter                                 &  Primary            &  Secondary         \\
\hline
Mass $m$ ($M_{\odot}$)                    &  $5.17 \pm 0.11$   &  $4.524 \pm 0.066$ \\
Radius $R$ ($R_{\odot}$)                  &  $2.681 \pm 0.046$  &  $2.478 \pm 0.046$ \\
Effective temperature (K)                 &  $17~300 \pm 800$\phantom{22} &  $15~400 \pm 800$\phantom{22}   \\
$v \sin\beta$ (km~s$^{-1}$)               &  $108 \pm 4$\phantom{22}    &  $116 \pm 4$\phantom{22}  \\
$\lambda$ (deg)                           &  $+72 \pm 4$\phantom{$+2$}   &  $-84 \pm 8$\phantom{$-2$}       \\
$\log k_2$                                &  $-2.10 \pm 0.05$\phantom{$-$}   &  $-2.13 \pm 0.05$\phantom{$-$}  \\
\hline
Orbital period $P$ (days)\tablefootmark{*}                & \multicolumn{2}{c}{$10.5501696 \pm 0.0000007$\phantom{2}} \\
Reference epoch $T_0$ (HJD)               & \multicolumn{2}{c}{$2~447~372.9567 \pm 0.0005$\phantom{$2~447~37$}} \\
$\omega_0$ at reference epoch (deg)       & \multicolumn{2}{c}{$330.0 \pm 0.1$\phantom{33}} \\
Orbital eccentricity $e$                  & \multicolumn{2}{c}{$0.4895 \pm 0.0008$} \\
Orbital inclination $i$ (deg)             & \multicolumn{2}{c}{$89.30 \pm 0.07$\phantom{2}} \\
$\dot\omega_{\rm obs}$ (deg cycle$^{-1}$) & \multicolumn{2}{c}{$0.00042 \pm 0.00012$} \\
\hline                  
\end{tabular}
\tablefoot {\tablefoottext{*}{$P$ corresponds here to the sidereal period $P_{\rm s}$.}}
\end{table}