\begin{table}%t8
\caption{Studied stars.}
\label{table Studied stars}
\small%\centerline
{
\begin{tabular}{llllllll}
\hline
\hline
\multicolumn{4}{l}{Star designation} & & \multicolumn{2}{l}{Position (J2000)}\\ 
\cline{1-4}\cline{6-7}
$N$ & 
VdBH$^\dagger$ & 
DENIS &
Other & & 
$\alpha$ &
$\delta$ & 
Nebula \\ 
\hline
1 & 13a A & J082052.9-361251 & CD-35~ 4502 & & 08 20 52.92 & --36 12 51.1 & NGC~2579   \\
2 & 13a B & J082052.8-361258 &              & & 08 20 52.83 & --36 12 58.0 & NGC~2579  \\
3 & 13b A & J082054.8-361258 &              & & 08 20 54.86 & --36 12 58.9 & NGC~2579  \\
4 & 13b B & J082055.0-361306 &              & & 08 20 55.05 & --36 13 06.0 & NGC~2579  \\
5 & 13c   & J082056.9-361342 &              & & 08 20 56.97 & --36 13 42.5 & ESO~370-9 \\
\hline
\end{tabular}}
\medskip
$\dagger$ Original designations of VdBH 13a and VdBH 13b broken in two stars by
\citet{RousseauPerie1996} and in this paper, respectively.
\end{table}