\begin{table} %t2
\caption{Disk characteristics.}\label{moldisks:tab_disks_char}
\par
%\centerline
{
\begin{tabular}{llllll}
\hline
\hline
\multicolumn{1}{c}{Star}&\multicolumn{1}{c}{Disk mass$^a$}&\multicolumn{1}{c}{Radius}&\multicolumn{1}{c}{Diameter}&\multicolumn{1}{c}{Inclination}&\multicolumn{1}{c}{Ref.}\\
 & \multicolumn{1}{c}{(10$^{-2}$$M_{\odot}$)} & \multicolumn{1}{c}{(AU)} &\multicolumn{1}{c}{(\arcsec)} & \multicolumn{1}{c}{(\degr)}\\
\hline
{\object{LkCa~15}}   & $3.3 \pm 1.5$ & 425     &  6.2  & \ \ \ $57\pm10$  & 1\\
{\object{TW~Hya}}    & $3.0 \pm 2.0$ & 200     &  7.0  & $<$10      & 2, 3, 4,
5, 6\\
{\object{HD~163296}} & $6.5 \pm 2.9$ & 310     &  5.0  & \ \ \  $32\pm5$   & 7\\
{\object{MWC~480}}   & $2.2 \pm 1.0$ & 695     & 10.4  & \ \ \  $30\pm5$   & 7\\      
\hline
\end{tabular}}
\smallskip
  $^a$ Total gas + dust mass computed from millimeter continuum flux
  using a dust opacity coefficient
  $\kappa_{\lambda}=0.01$(1.3~mm/$\lambda$) cm$^2$ g$^{-1}$ and
  assuming a standard gas-to-dust mass ratio of 100.\\
  References.\ (1) Qi et~al.\ (\cite{Qi03}), (2) Weintraub et~al.\ 
  (\cite{Weintraub89}), (3) Krist et~al.\ (\cite{Krist00}), (4)
  Weinberger et~al.\ (\cite{Weinberger02}), (5) Wilner et~al.\ 
  (\cite{Wilner00}), (6)~Calvet et~al.\ (\cite{Calvet02}), (7) Mannings et~al.\ (\cite{Mannings96}).
\end{table}