\begin{table}%t1
\caption{\label{star}Stellar parameters of BD+20 1790.}           
%\centering
\par
\begin{tabular}{lr}       
\hline\hline\noalign{\smallskip}                
Parameter & Value   \\     
\hline                         
Spectral Type & K5 V\\
$B-V$ & 1.15 \\
$M$\tablefootmark{a} & 0.63 $\pm$ 0.09 $M_{\sun}$\\
$T_{\rm eff}$\tablefootmark{b} & 4410  K\\
$\log {\it g}$\tablefootmark{a} & 4.53 $\pm$ 0.17 \\
$EW{\rm(Li)}$\tablefootmark{a} & 110 $\pm$ 3  m\AA\\
 {\it Distance}\tablefootmark{e} & 25.4 $\pm$ 4  pc \\
 {\it Age}\tablefootmark{c} & 35--80  Myr\\
$v \sin i$\tablefootmark{d} & 10.03 $\pm$ 0.47  km s$^{-1}$\\
$P_{\rm phot}$\tablefootmark{a} & 2.801 $\pm$ 0.001  days\\
$i$\tablefootmark{a} & 50.41  degrees\\
$R$\tablefootmark{a} & 0.71 $\pm$ 0.03 $R_{\sun}$ \\
\textrm{[Fe/H]}\tablefootmark{a} & 0.30 $\pm$ 0.20\\
log$N$(Li)\tablefootmark{a} & 1.03 $\pm$ 0.04 \\
$L_{\rm X}$\tablefootmark{a} & $1.6 \pm 0.5 \times 10^{29}$~erg s$^{-1}$ \\
$L$\tablefootmark{a} & 0.17 $\pm$ 0.04 $L_{\sun}$ erg s$^{-1}$\\
\hline                                    
\end{tabular}
\tablefoot{\tablefoottext{a}{This paper}; 
\tablefoottext{b}{from Carrol \& Ostlie (\cite{Carrol2007});} 
\tablefoottext{c}{from L\'opez Santiago et~al. (\cite{Lopez2006});} 
\tablefoottext{d}{from L\'opez Santiago (\cite{Lopez2005});} 
\tablefoottext{e}{from Reid et~al. (\cite{Reid2004})}.}  
\end{table}