\begin{table}%t2
%\centering
\par
\caption{\label{tab:orbit}Orbital elements of 30~Ari~B.}
\begin{tabular}{ll}
\hline \hline
Element & Value \\
\hline
Period [days]                   & $335.1\pm2.5$ \\
$T_0$ [HJD]                     & $245~4538\pm20$ \\
$K_{1}$ [$\rm m~s^{-1}$]        & $272\pm24$ \\
$e$                             & $0.289\pm0.092$ \\
$\omega$ [deg]                  & $307\pm18$  \\
$\sigma $ (O--C) [$\rm m~s^{-1}$]  & 135 \\
$f(m)={{m_2^3 \sin^3{i}}\over{(m_1+m_2)^2}}$ [$M_\odot$] & $(6.1\pm1.7)\times 10^{-7}$ \\
$a_1\sin i$ [AU]              & $0.00802\pm0.00074$ \\
$a$ [AU]                        & $0.995\pm0.012$ \\
$m_1$ [$M_\odot$]            & $1.16\pm0.04$  \\
$m_2\sin i$ [$M_{\rm Jup}$]    & $9.88\pm0.94$ \\
\hline
\end{tabular}
\end{table}