\begin{table}%t4
\caption{\label{tabcourve}Possible orbital parameters of the SB1 solution of HD~46~573$^{{a}}$.}    
%\centerline
 {          
\begin{tabular}{l c c}   
\hline\hline       
   Parameter & Circular  & Eccentric\\
\hline
$P$(days) & 10.67 (fixed) & 10.67 (fixed)\\
$e$ & \dots & 0.47~$\pm$~0.13\\
$\omega$ (degrees)& \dots & 254.63~$\pm$~14.2\\
$T_0$  & 3732.24~$\pm$~0.26 & 3731.68~$\pm$~0.48\\
$\gamma$ (km s$^{-1}$)& 49.7~$\pm$~0.7 & 50.9~$\pm$~0.8\\
$K$ (km s$^{-1}$)&  6.9~$\pm$~0.9  &  8.5~$\pm$~1.1\\
$a\:\sin i$ ($R_\odot$) &    1.46~$\pm$~0.19 & 1.58~$\pm$~0.24\\
$f(m)$ ($M_\odot$) & 0.0003~$\pm$~0.0001 & 0.0005~$\pm$~0.0002\\
rms (km s$^{-1}$) & 3.5 & 2.6 \\
Prob ($\chi^2~>$)&78\%&99\%\\
\hline                  
\end{tabular} }
\par
\smallskip
$^{{a}}$ $T_0$ (expressed in HJD$-$2~450~000) refers to the time of periastron passage for $e$~$\neq$~0 and to the conjunction with the primary star in front for $e$~=~0. $\gamma$, $K$, and $a\:\sin i$ are, respectively, the systemic velocity, the semi-amplitude of the radial velocity curve, and the projected
separation between the center of the star and the center of mass of
the binary system. The orbital elements are given for a circular and an eccentric orbit, respectively, by the RVs of both \ion{He}{i}~$\lambda$~4471 and~$\lambda$~5876. 
\end{table}