\begin{table}%t4
\par
\caption{\label{eb_params}Physical and geometric parameters of HD~174884.}
%\centerline
 {
\begin{tabular}{lccc}
\hline \hline
Parameter                             &                      & System             &                      \\
                                               & Primary              &                    & Secondary            \\
%                                              & (Sp.Type)            &                    & (Sp.Type)            \\
\hline
$a$ (\rs)                     &                      & $18.88 \pm 0.14$ &                      \\
$i$ (${}^\circ$)            	      &                      & $75.35 \pm 0.03$     &                      \\
$q=\mathscr M_2/\mathscr M_1$     &                      & $0.674 \pm 0.009$  &                      \\
$e$                                         &                      & $0.2939 \pm 0.0005$  &                      \\
$\omega$                               &                      & $51.31^o \pm 0.06^o$ &                      \\
$v_\gamma$  (\ks)                  &                      & $-20.6 \pm 0.3$    &                      \\
$\Omega$                              & $6.055 \pm 0.008$   &                    & $7.866 \pm 0.020$    \\
$T_{\rm eff}$ (K)              & 13140  &                 & $12044 \pm 50$      \\
$\mathscr M$ (\ms) & $4.04 \pm 0.11$      &                    & $2.72 \pm 0.11$      \\
$\mathscr R$ (\rs) & $3.77 \pm 0.03$    &                    & $2.04 \pm 0.02$    \\
$M_{\rm bol}$                  & $-1.71 \pm 0.04$   &                    & $0.01 \pm 0.05$   \\
$F = \omegaup_{\rm rot}/
         \omegaup_{\rm orb}$   & $2.0^* \pm 0.2^*$ &                  & $2.3^* \pm 0.2^*$ \\
\hline
\end{tabular}}
\par
\smallskip
{${}^*$ Computed from the observed $v \sin i$ and orbital period.} 
\par
\end{table}