\begin{table}%T2
\caption{\label{tab:fitpars} Parameters of the best orbital solution.}
%\centerline
{$$
\begin{tabular}{cr@{~$\pm$~}l|cr@{~$\pm$~}l}
\hline
\hline
%
\multicolumn{6}{c}{Fit parameters}\\
%
\hline\\[-3.2mm]
%
$a$ ($10^{-3}$ \arcsec) & 82.1 & 1.8 & $\alpha_0$ ($10^{-3}$
\arcsec) & --20.7 & 4.0 \\
%
$e$ & 0.466 & 0.031 & $\delta_0$ ($10^{-3}$ \arcsec) &
--694.3 & 2.9 \\
%
$i$ (\degr) & 37.2 & 5.1 & $v_\alpha$ ($10^{-3}$ \arcsec/yr) &
--9.12 & 0.54 \\
%
$\Omega$ (\degr) & 115.2 & 6.8 & $v_\delta$ ($10^{-3}$ \arcsec/yr) &
1.71 & 0.39 \\
%
$\omega$ (\degr) & 12.5 & 10.3 & $a_\alpha$ ($10^{-4}$
\arcsec/yr$^2$) & 1.09 & 0.50 \\
%
$t_{\rm P}$ & 1995.86 & 0.21 & $a_\delta$ ($10^{-4}$ \arcsec/yr$^2$) &
1.18 & 0.58 \\
%
$P$ (yr) & 21.66 & 0.93 & $\mu$ & 0.183 & 0.044 \\
%
\hline
\multicolumn{6}{c}{Derived quantities$^{a}$}\\
%
\hline
%
$A$ (AU) & 11.59 & 0.35 & $M_{{\rm S}}$ ($M_\odot$) &
3.34 & 0.36 \\
%
$M_{{\rm Sa}}$ ($M_\odot$) & 2.73 & 0.31 & $M_{{\rm Sb}}$
 ($M_\odot$) & 0.61 & 0.17 \\
%
\hline
\end{tabular}$$}

$^{a}$ The uncertainty on the derived quantities
  include that induced by the distance estimate.
\end{table}