\begin{table}%t2
%\centering
\par
\caption{Radial velocity measurements data (km~s$^{-1}$). Column
headings: star -- HD number; $l$, $b$ -- Galactic longitude and
latitude; $K$~{\sc i} -- $K$~{\sc i} line at 7699 \AA; $D1$, $D2$ --
Na~{\sc i} lines; $H$, $K$ -- Ca~{\sc ii} lines; 5780, 5797 -- diffuse
interstellar bands at 5780 and 5797~\AA\ respectively.\label{tab2}}
\begin{tabular}{lrrrrrrrrr}
\hline\hline
Star       &    $l$   &   $b$    & $K$~{\sc i}    &  $D1$    &  $D2$    &   $H$     & $K$     & 5780  &  5797  \\
\hline
HD 31648   & 173.47 & --7.9   & 14.7  & 15.4   & 16.2   &  15.7   & 14.5  & 14    & 16     \\
HD 36917   & 209.12 & --19.57 & 27.1  & 27.5   & 27.6   &  29.5   & 26.5  & 76    & 32     \\
HD 50138   & 219.15 & --3.14  & 40.5  & 40.7   & 40.9   &  35.6   &       &       &        \\
           &        &        & 19.3  & 19.6   & 20.5   &  23.1   & 24.5  & 24    & 37     \\
HD~179218   &  49.21 & 2.89   &       & --17.1  & --15.6  &  --13.9  & --15.8 & --8    & --22    \\
HD~190073   &  46.5  & --13.1  &       & 0.3    & 1      &  2.5    & 1     & --8    & --2     \\
           &        &        &       &  --17.4 & --16.1  &  --15    & --20   &       &        \\
HD~250550   &  192.62 & --3.04 &       &  15.7  & 17.2   &  15.5   & 15.2  & 11    &  10.5  \\
\hline
\end{tabular}
\end{table}