\begin{table}%t1
\par
 \caption{\label{tab:astrometric}Astrometric data.}
 \small%%\centering

\par
 \begin{tabular}{llllll}
   \hline
   \hline\noalign{\smallskip}
   Object                   & $\alpha$ [h m s] (2000) & $\delta$ [$^{\circ}\ ^{\prime}\ ^{\prime\prime}$] (2000) & Distance [pc]    & Ref. & Type of object    \\
   \hline
   \object{NGC~7023}        & 21 01 36.9              & +68 09 49                                                & 430              & 1    & reflection nebula \\ 
   \object{NGC~2023}        & 05 41 37.9              & --02 15 52                                                & 470              & 2    & reflection nebula \\
   \object{NGC~4736}        & 12 50 53.2              & +41 07 14                                                & $5.0\times 10^{6}$ & 3    & LINER galaxy      \\ 
   \object{HD~36917}        & 05 34 46.9              & --05 34 15                                                & 510              & 4    & Herbig Ae/Be star \\ 
   \object{HD~37411}        & 05 38 14.5              & --05 25 13                                                & 510              & 4    & Herbig Ae/Be star \\ 
   \object{CN1-5}           & 18 29 11.6              & --31 29 59                                                & $46\times 10^{2}$  & 5    & planetary nebula  \\ 
   \object{NGC~6567}        & 18 13 45.1              & --19 04 34                                                & $24\times 10^{2}$  & 6    & planetary nebula  \\ 
   \object{LMC SMP036}      & 05 10 39.7              & --68 36 04                                                & $51\times 10^{3}$  & 7    & planetary nebula  \\
   \object{LMC SMP038}      & 05 11 23.8              & --70 01 57                                                & $51\times 10^{3}$  & 7    & planetary nebula  \\ 
   \object{LMC SMP061}      & 05 24 36.0              & --73 40 39                                                & $51\times 10^{3}$  & 7    & planetary nebula  \\ 
   \object{IRAS 12063-6259} & 12 09 01.2              & --63 15 56                                                & $95\times 10^{2}$  & 8    & H{\sc ii} region  \\ 
   \object{Orion Bar Pos 1} & 05 35 18.3              & --05 24 42                                                & 430              & 1    & H{\sc ii} region  \\ 
   \object{Orion Bar Pos 2} & 05 35 12.1              & --05 26 09                                                & 430              & 1    & H{\sc ii} region  \\ 
   \hline
 \end{tabular}
 \tablebib{(1) \citet{1997AetA...324L..33V}; (2) \citet{1997AA...323L..49P}; (3) \citet{2007ApJ...656..770S}; (4) \citet{1999AJ....117..354D}; 
   (5) \citet{1995ApJ...452..286S}; (6) \citet{1992AetAS...94..399C}; (7) \citet{2000AetA...363L...1K}; (8) \citet{1987AetA...171..261C}.
}\end{table}