\begin{table}%t3
\caption{\label{tab3}Positions of interstellar OH lines obtained in this work (a) compared with data from the literature.}
\small%\centerline
 {
\begin{tabular}{lcc}
\hline\hline
HD  & Position      &   Position        \\
& [\AA] & [\AA] \\
& &\\
    \hline
163~800  & 3078.443 $\pm$ 0.003$^{a}$ &3081.665 $\pm$ 0.003$^{a}$ \\
169~454  & 3078.443 $\pm$ 0.002$^{a}$ &3081.664 $\pm$ 0.003$^{a}$ \\
149~757  & 3078.44$^{b}$         &3081.66$^{b}$          \\
24~398   & 3078.4399$^{c}$ + 3078.472$^{c}$        &3081.6645$^{c}$            \\
\hline
\end{tabular}}
\smallskip
$^a$~--~This work; $^b$~--~Herbig (\cite{Herb68}); $^c$~--~Felenbok \& Roueff (\cite{Fele96}).
\end{table}