\begin{table}%t1
\caption{\label{tab:literature_param}Physical parameters of SAO~51891 from the literature.}
%\centering
\small
 \begin{tabular}{lll}
  \hline\hline
  Parameter                  & Value & Reference\\
  \hline
&& \\[-8pt]
  $f_{\rm X}$ (cts~s$^{-1}$)          & 1.03 $\pm$ 0.05  & \cite{Voges1999}\\
  Spectral type                   & K0V/IV & \cite{Jeffries95}\\
   $''$                              & K1V    & \cite{Henry95}\\
  $\pi$ (mas)                     & 42.4 $\pm$ 7.2  & \cite{Hog2000} \\
   $''$                              & 36.3 $\pm$ 5.0  & \cite{Montes01b} \\
   $''$                              & 20            & \cite{Carpenter2005} \\
  $\mu_{\alpha}$ (mas~yr$^{-1}$) & 93.4 $\pm$ 2.5  & \cite{Hog2000}\\
  $\mu_{\delta}$ (mas~yr$^{-1}$) &  5.0 $\pm$ 2.5  & \cite{Hog2000}\\
  $v\sin i$ (km~s$^{-1}$)        & 15  	  & \cite{Jeffries95}\\
  $''$                               & $16\pm1$   & \cite{Henry95}\\
  $''$                               & 19.8       & \cite{Fekel97}\\
  $''$                               & 20         & \cite{Osten98}\\
  $P_{\rm rot}$ (days)            & 2.42 $\pm$ 0.01     & \cite{Henry95}\\
  $''$                               & 2.410 $\pm$ 0.003   & \cite{Xing2007}\\
  $R$ ($R_{\odot}$)               & $\ge$0.77 & \cite{Henry95}\\
  $EW_{\rm \ion{Li}{i}}$ (m\AA)   & 250                & \cite{Mulliss94}\\
  $''$                               & 277 		  & \cite{Jeffries95}\\
  $''$                               & 257 		  & \cite{Montes01a}\\
  $V_{\rm rad}$ (km~s$^{-1}$)    & $-$19.4 & \cite{Jeffries95}\\
  $''$                               & $-19.8\pm0.2$   & \cite{Henry95}\\
  $''$                               & $-22.1\pm0.6$   & \cite{Osten98}\\
  "                               & $-20.19\pm0.12$ & \cite{Montes01a}\\
  $U_{\odot}~ ($km~s$^{-1}$)     & $7.06$ $\pm$ 1.43   & \cite{Montes01a} \\
  $V_{\odot}~ ($km~s$^{-1}$)     & $-22.19$ $\pm$ 0.34 & \cite{Montes01a} \\
  $W_{\odot}~ ($km~s$^{-1}$)     & $-3.90$ $\pm$ 0.86  & \cite{Montes01a} \\
  $T_{\rm eff}$ (K)               & 5200  & \cite{Osten98}\\
  \hline
\end{tabular}
\end{table}