\begin{table}%t1
\caption{\label{star}Stellar properties of 30~Ari~A, B.}
%\centerline
 {
\begin{tabular}{lll}
\hline \hline
Parameter                          & 30~Ari~A                       & 30~Ari~B                            \\
\hline
RA                                 &  02 37 00.5237                 &  02 36 57.7405                      \\
Dec                                & +24 38 50.0000                 & +24 38 53.0270                      \\
Spectral type                      &  F5V$^{14}$                  & F4V$^{4}$, F6V$^{6}$, F6V$^{14}$    \\
$v\sin i$ [$\rm km~s^{-1}$] & $38.5\pm2.6^{14}$              & $40.6^{7}$, $38.3\pm1.8^{14}$       \\
$V$ {\rm [mag]}                      & $6.497^{10}$, $6.48^{5}$       & $7.091^{10}$, $7.1^{5}$             \\
$B-V$ {\rm [mag]}                    & $0.410^{8,13}$                 & $0.510^{12,13}$                     \\
$J$ {\rm [mag]}                      & $5.681\pm0.019^{11}$           & $6.080\pm0.020^{11}$                \\
$H$ {\rm [mag]}                      & $5.580\pm0.051^{11}$           & $5.908\pm0.029^{11}$                \\
$K$ {\rm [mag]}                      & $5.479\pm0.024^{11}$           & $5.822\pm0.021^{11}$                \\
$M_v$                          & $3.48^{10}$, $3.46^{5}$        & $4.12^{10}$, $4.12^{5}$             \\
$\pi$ {\rm [mas]}                  & $24.92\pm1.05^{3}$             & $25.36\pm1.10^{3}$                  \\
Distance {\rm [pc]}                & $40.1\pm1.7$                   & $39.4\pm1.7$                        \\
$\rm [Fe/H]$ {\rm [dex]}           & $0.27^{4}$, $0.00^{10}$,       & $0.27^{1,7}$, $-0.13^{10}$,         \\
                                   & $0.11^{2}$                     & $0.245\pm0.195^{9}$,                \\
                                   &                                & $0.03^{2}$, $0.27^{6}$              \\
$T_{\rm eff}$ {\rm [K]}            & $6462^{4}$, $6668^{10}$        & $6462^{1,4}$, $6152^{10}$           \\
                                   & $6300\pm60^{9}$, $6726^{2}$     & $6300\pm60^{9}$, $6364^{2}$,        \\
                                   & $6457^{5}$                     & $6607^{5}$                          \\
$\log g$                       & $4.51^{2}$, $4.25^{5}$         & $4.50^{4}$, $4.54^{2}$, $4.44^{5}$  \\
$M_*~[M_\odot]$               & $1.32\pm0.05^{10}$, $1.36^{5}$ & $1.11\pm0.06^{10}$, $1.20^{5}$      \\
                                   & $1.31\pm0.04^{14}$             & $1.16\pm0.04^{14}$                  \\
Age {\rm [Gyr]}                    & $0.86\pm0.63^{14}$             & $0.91\pm0.83^{14}$                  \\
$R_*~[R_\odot]$               & $1.37\pm0.03^{10}$             & $1.13\pm0.03^{14}$                  \\
$\rm \theta~[mas]$                & $0.32\pm0.01^{14}$             & $0.26\pm0.01^{14}$                  \\
\hline
\end{tabular}}
\par
\medskip
$^1$ Boesgaard \& Friel (\cite{boesgaard90}).
$^2$ Marsakov et~al. (\cite{marsakov95}).
$^3$ Hipparcos, Perryman \& ESA (\cite{perryman97}).
$^4$ Cayrel de Strobel et~al. (\cite{strobel97}).
$^5$ Allende Prieto et~al. (\cite{allende99}).
$^6$ Malagnini et~al. (\cite{malagnini00}).
$^7$ Buzzoni et~al. (\cite{buzzoni01}).
$^8$~De~Medeiros et~al. (\cite{mediro02}).
$^9$ Taylor (\cite{taylor03}).
$^{10}$ Nordstr\"om et~al. (\cite{nordstrom04}).
$^{11}$ Skrutskie et~al. (\cite{skrutskie06}).
$^{12}$ Tolbert (\cite{tolbert64}).
$^{13}$ Mermilliod (\cite{mermilliod91}).
$^{14}$~This work.
\end{table}