\begin{table}%t1
   \caption{Stellar properties of the components of HD 219542.}
     \label{t:star_param}
%\centerline
{  
       \begin{tabular}{lccc}
         \hline
         \hline
         Parameter   &  HD 219542 A &  HD~219542~B  & Ref. \\
         \hline
$\alpha$ (2000)          & 23~16~35.24 &  23~16~35.42 &  1   \\
$\delta$ (2000)          & $-$01~35~11.5 &  $-$01~35~07.0 &  1   \\
$\mu_{\alpha}$ (mas yr$^{-1}$)  & 163.28 $\pm$ 2.12 & 163.28 $\pm$ 2.12  & 1   \\
$\mu_{\delta}$ (mas yr$^{-1}$)  &  20.97 $\pm$ 1.52 & 20.97 $\pm$ 1.52  & 1   \\
$RV$     (km s$^{-1}$)            &  $-$11.1 $\pm$ 0.2 & $-$10.0 $\pm$ 0.2 & 2 \\
$\pi$  (mas)             & \multicolumn{2}{c}{18.30 $\pm$ 1.97}   & 1   \\
$d$    (pc)              & \multicolumn{2}{c}{54.6 $\pm$ 5.9}  & 1 \\
$U$   (km s$^{-1}$)             & \multicolumn{2}{c}{$-$40.5 $\pm$ 4.8 }  & 2 \\
$V$   (km s$^{-1}$)             & \multicolumn{2}{c}{$-$16.4 $\pm$ 3.6 }  & 2 \\
$W$   (km s$^{-1}$)             & \multicolumn{2}{c}{ $-$4.0 $\pm$ 2.5 }  & 2 \\
 & &  &   \\
$V_{T}$                  & 8.172 $\pm$ 0.019 &  8.591 $\pm$ 0.028 & 3  \\
$(B-V)_{T}$              & 0.705 $\pm$ 0.029 &  0.791 $\pm$ 0.044 & 3   \\
$V$                        & 8.198 $\pm$ 0.021 &  8.589 $\pm$ 0.021 & 4\\
$V{-}I$                      & 0.641 $\pm$ 0.035 &  0.705 $\pm$ 0.037 & 4\\
$H_{\rm p}$                  & 8.312 $\pm$ 0.006 &  8.689 $\pm$ 0.008 & 1  \\
$H_{\rm p}$ scatter          & \multicolumn{2}{c}{0.011$^{{a,b}}$} & 1 \\
$J$                        & 6.992 $\pm$ 0.023 & 7.216 $\pm$ 0.033 & 5 \\
$H$                        & 6.726 $\pm$ 0.039 & 6.896 $\pm$ 0.045 & 5 \\
$K$                        & 6.627 $\pm$ 0.033 & 6.830 $\pm$ 0.045 & 5 \\
$b-y$                    & \multicolumn{2}{c}{0.405$^{{a}}$  $\pm$ 0.006} & 6 \\
$m_{1}$                  & \multicolumn{2}{c}{0.214$^{{a}}$  $\pm$ 0.009} & 6 \\
$c_{1}$                  & \multicolumn{2}{c}{0.367$^{{a}}$  $\pm$ 0.004}  & 6 \\
 & & &  \\
ST                       & G2V  &  G7V &  7  \\
$M_{V}$                  & 4.48 $\pm$ 0.23 &    4.90 $\pm$ 0.23  & 8 \\
$T_{{\rm eff}}$ (K)            & 5989 $\pm$ 50 & 5713 $\pm$ 50 &  8 \\
$\Delta T_{{\rm eff}}~(A-B)$ (K)& \multicolumn{2}{c}{276 $\pm$ 14} &  8 \\
$\log g$                 & 4.37 $\pm$ 0.10 &  4.38 $\pm$ 0.10 &  8 \\
 & & &    \\
$\log R^{'}_{HK}$        & $-$5.36 $\pm$ 0.13 &  $-$5.11 $\pm$ 0.13 &  2 \\
$ v \sin i $~(km s$^{-1}$)      & 1.9 $\pm$ 0.1 &  2.4 $\pm$ 0.1 &  2 \\
$ v_{\rm mac} $ (km s$^{-1}$)       & 4.4 $\pm$ 0.3 &  4.8 $\pm$ 0.3 &  2 \\
$L_{\rm X}$ (erg s$^{-1}$)          & \multicolumn{2}{c}{$2.1^{+1.8}_{-1.2}~10^{28~{a}}$} & 2 \\
 & & &   \\
${\rm [Fe/H]}$           & +0.29 $\pm$ 0.10 &  +0.20 $\pm$ 0.10 &  8 \\
$\Delta {\rm [Fe/H]}(A-B)$& \multicolumn{2}{c}{0.091 $\pm$ 0.009 } &  8 \\
$\log N_{{\rm Li}}$            & 2.35 &  $<$1.0  & 8 \\
 & & &   \\
${\rm Mass}~(M_{\odot})$ & 1.13 $\pm$ 0.05 &  1.06 $\pm$ 0.05 &  2 \\
${\rm Radius}~(R_{\odot})$ & 1.05  &  0.96 &  2 \\
Age  (Gyr)               &\multicolumn{2}{c}{$\sim$$2$}  &  2  \\
         \hline
      \end{tabular}}
\medskip
References: 1 Hipparcos (ESA \cite{hipparcos});
            2 This paper;
            3 Tycho (ESA \cite{hipparcos});
            4 Cuypers \& Seggewiss (\cite{cuypers99});
            5 2MASS;
            6 Olsen (\cite{olsen});
            7~Corbally \& Garrison (\cite{corbally});
            8 Paper I. \\
$^{{a}}$ A+B.  \\
$^{{b}}$ See Sect.~\ref{s:hipparcos} for details.
\end{table}