\begin{table}%T2
%\centering
\small
\caption{Orbital parameters for the companion to 4~UMa.}\label{t2}
\begin{tabular}{ll}
\hline
\hline
Period [days]                   & 269.3 $\pm$ 1.96  \\
$T_{\rm periastron}$[JD]            & 52~987.3936 $\pm$ 4.31 \\
$K$[m~s$^{-1}$]                    & 215.55 $\pm$ 7.10  \\
$\sigma$(O--C)[m~s$^{-1}$]     & 28.8   \\ 
$e$                               & 0.432 $\pm$ 0.024  \\
$\omega$[deg]                   & 23.81 $\pm$ 4.42 \\
$f(m)$[solar masses]              & (2.045 $\pm$ 0.247) $\times$ 10$^{-7}$ \\
$a$[AU]                           & 0.87 $\pm$ 0.04 \\ 
\hline
\end{tabular}
\end{table}