\begin{table}%t1
\caption{Millimeter flux densities, sizes, spectral indices and masses.             
\label{tab1}      }
%\centerline
$$        
\begin{tabular}{l c c c c c }     % 7 columns 
\hline\hline       
\\
%\multicolumn{6}{c}{3.3mm (90.3 GHz)} \\
\multicolumn{1}{l}{3.3~mm (90.3 GHz)} 
& \multicolumn{1} {c}{BIMA 3}  &  \multicolumn{4}{c}{-------------------------- BIMA 2 --------------------------} \\
                  &             &  Cocoon      & 41.86+11.9   &  41.73+12.8   &  41.73+14.3  \\ \hline\\[-3mm]
$\alpha$ (J2000)  & 21$^{\rm h}$40$^{\rm m}$42\fs84 & 21$^{\rm h}$40$^{\rm m}$41\fs86  & 21$^{\rm h}$40$^{\rm m}$41\fs85  &  21$^{\rm h}$40$^{\rm m}$41\fs73  & 21$^{\rm h}$40$^{\rm m}$41\fs72  \\
$\delta$ (J2000)  & 58\degr16\arcmin01\farcs4  & 58\degr16\arcmin13\farcs2   & 58\degr16\arcmin11\farcs9   &  58\degr16\arcmin12\farcs8   &  58\degr16\arcmin14\farcs3  \\
Size ($\arcsec$)        &  $0.8'' \times 0.5''$  &  $4.3'' \times 3.1''$   & ${\le} 0.5''$   & ${\le} 0.5''$    & ${\le} 0.3''$  \\        
{\it S} (mJy)           &      8       &     16       &     5.9      &      1.5      &         2.7  \\ \hline 
\\
%\multicolumn{6}{c}{1.3mm (237.6 GHz)}\\
\multicolumn{1}{l}{\rf 1.3~mm (237.6 GHz)} 
& \multicolumn{1} {c}{BIMA 3}  &  \multicolumn{4}{c}{-------------------------- BIMA 2 --------------------------}\\
                                 &     &  Cocoon    &    41.86+11.9   &  41.73+12.8    &  41.73+14.3  \\ \hline\\[-3mm]
$\alpha$ (J2000)  &   21$^{\rm h}$40$^{\rm m}$42\fs84      &   21$^{\rm h}$40$^{\rm m}$41\fs85      & 21$^{\rm h}$40$^{\rm m}$41\fs86        &   21$^{\rm h}$40$^{\rm m}$41\fs73  &  21$^{\rm h}$40$^{\rm m}$41\fs73  \\ 
$\delta$ (J2000)  &   58\degr16\arcmin01\farcs4       &   58\degr16\arcmin13\farcs1       & 58\degr16\arcmin11\farcs9         &   58\degr16\arcmin12\farcs8   &  58\degr16\arcmin14\farcs3   \\
Size ($\arcsec$)        & $0.8''\times0.4''$ & $4.5''\times3.1''$ & $0.4''\times0.2''$ & ${\le} 0.3''$    &   ${\le }0.2''$ \\
{\it S} (mJy)           &        30          &       245          &       35           &          6     &     10        \\ \hline
\\
\multicolumn{1}{c}{} & \multicolumn{1} {c}{BIMA 3}  &  \multicolumn{4}{c}{-------------------------- BIMA 2 --------------------------}\\
                                 &     &  Cocoon    &    41.86+11.9   &  41.73+12.8    &  41.73+14.3  \\ \hline
Mean Spec. Index   &      1.4     &    \multicolumn{4}{c}{1.9} \\
Spec. Index ($\alpha$)  &      1.4     &         2.8          &       1.9       &         1.5        &      1.4 \\
Mass ($M_\odot$)$^a$  &     0.05     &         0.4          &       0.06      &       0.01         &     0.01   \\
$\beta=\alpha-2$  &     $\le$0.0 &          0.8     &      $-0.1$   &      $\le$0.0      &  
$\le$0.0  \\
\hline                  
\end{tabular}
$$
\par
\smallskip
\hspace{26mm}{$^a$ Masses have to be scaled up by a factor of $\sim$6 for
a dust temperature of 20~K.}
\end{table}