\begin{table}%t4
\caption{\label{planet} Orbital parameters of BD+20 1790 b.}                 
%\centering
\par
\begin{tabular}{l c c c}       
\hline\hline\noalign{\smallskip}                
Parameter & Solution 1 & Solution 2 &  \\   
\hline                        
$P_{\rm orb}$ & 7.7834 $\pm$ 0.0004 & 7.7834 $\pm$ 0.0004  & days \\
$T_{\rm conj}$\tablefootmark{a} & 3085.8 $\pm$ 0.5 & 3086.30 $\pm$ 0.18 & \small HJD  \\
$a$ & 0.066 $\pm$ 0.001 & 0.066 $\pm$ 0.002 &AU \\
$e$ & 0.05 $\pm$ 0.02 & 0.14 $\pm$ 0.04 &\\
$K$ & 0.93 $\pm$ 0.03 & 0.84 $\pm$ 0.06 & km s$^{-1}$\\
$\gamma$ & 8.22 $\pm$ 0.01 & 8.12 $\pm$ 0.04 & km s$^{-1}$\\
$\omega$ & 200.4 $\pm$ 21.8 & 120.7 $\pm$ 14.0 & \small degrees  \\
$M_2 \sin i$ & 6.54 $\pm$ 0.57 & 6.15 $\pm$ 0.59 & $M_{\rm jup}$\\
rms  & 138.9 & 132.3  & m s$^{-1}$\\
$\chi^2$ & 1.071 & 0.997 & \\
\hline                                   
\end{tabular}
\tablefoot{\tablefoottext{a}{ Time of periastron passage.}}
\end{table}