\begin{table}%t1
\caption{Age-sequence of the sources found in Rosette.\label{cores}}
%\centering
\par
\begin{tabular}{lcccc}
\hline\hline\noalign{\smallskip}
 & $d$    & $\langle n \rangle$ & $M$      &  Young/ \\
Region & [pc] &  [10$^3$ cm$^{-03}$]  &  [$M_\odot$] &  evolved \\
\hline
7 PL7                   &  35  &  3.9    &  2080  &  3/0 \\ % 3/0
6 PL3                   &  27  &  1.5    &  1650  &  1/3 \\ % 1/2 
5 AFGL961               &  25  &  9.5    &   792  &  4/1 \\ % 3/1
3 Center                &  20  &  0.6    & 22~250  &  9/4 \\ % 8/5
1+2  Ext. + Mon. Ridge  &  10  &  0.6    &  4280  &  6/3 \\ % 6/3
4 Shell                 &  10  &  0.4    & 11~780  &  1/2 \\ % 1/2
\hline
\end{tabular}
%\vspace*{-2mm}
\tablefoot{The regions are
ordered with decreasing distance ($d$) from the center of NGC~2244 (for
simplicity we take as ``center'' the position of cluster B in
Fig.~\ref{temp}). The average density ($\langle n \rangle$) and mass ($M$) were derived from the
column density by determining the area of each region and assuming the same 
extent of the cloud along the line of sight.  The last column gives the number of sources 
(young vs. evolved).}
\vspace*{3mm}
\end{table}