\begin{table}%t3
\caption{\label{tab: orbit}Orbital solutions deduced from different lines (Col.~1).}
\small%\centerline
 {
\begin{tabular}{c c c c c c c}
\hline \hline
Line       &  $P$              &   $e$              &$\omega$                   &  $K_1$          & $\gamma_1$      & rms\\
           &  (d)              &                    &(\degr)                    & (\kms)          & (\kms)          & (\kms)\\
\hline
\hbeta        &  4.24021 & 0.058 $\pm$ 0.006 & 140 $\pm$  5\hspace*{2mm}  & 117.0 $\pm$ 0.5 & $-29.6 \pm$ 0.6 &  4.9 \\
\heb~\l4686  &  4.24029 & 0.085 $\pm$ 0.003 & 153 $\pm$  1\hspace*{2mm}  & 124.4 $\pm$ 0.2 & $-17.3 \pm$ 0.3 & \hspace*{1mm}2.0 \\
\hea~\l4922  &  4.24023 & 0.057 $\pm$ 0.006 & 148 $\pm$  4\hspace*{2mm}  & 107.7 $\pm$ 0.4 & $-17.9 \pm$ 0.5 & \hspace*{1mm}3.8 \\
\hea~\l5015  &  4.24015 & 0.059 $\pm$ 0.006 & 150 $\pm$  4\hspace*{2mm}  & 112.1 $\pm$ 0.4 & $-22.2 \pm$ 0.6 & \hspace*{1mm}4.0 \\
\hea~\l5876  &  4.24021 & 0.069 $\pm$ 0.004 & 151 $\pm$  2\hspace*{2mm}  & 115.9 $\pm$ 0.3 & $-22.4 \pm$ 0.4 & \hspace*{1mm}2.9 \\
\hea~\l6678  &  4.24022 & 0.061 $\pm$ 0.005 & 151 $\pm$  3\hspace*{2mm}  & 114.4 $\pm$ 0.4 & $-14.7 \pm$ 0.5 & \hspace*{1mm}3.2 \\
\hline 
\end{tabular}}
\medskip
The usual notations for the orbital elements have been used. Quoted uncertainties are the 1-$\sigma$~error bars.
\end{table}