\begin{table}%t1
%\centering
\par
  \caption {\label{tab:vanth}Summarized properties of the Orcus/Vanth binary
    system.}     
%\centering
\par
\renewcommand{\footnoterule}{}  % to avoid a line before footnotes
\begin{tabular}{c l l c} 
\hline          
\hline   
\noalign{\smallskip}
&Parameter             & Value& Reference \\
\hline   
\multirow{2}*{System} &Angular separation    & 0.26$\arcsec$& (1)\\
                      &Total mass            & $6.3\times 10^{20}$ kg & (2)\\
	  \hline
\multirow{3}*{Orbit}  &Semi-major axis       &8980~$\pm$~20 km           & (2)\\
                      &Period                &9.5d                     & (2)\\
                      &Inclination           &90$^{\circ}$ or 306$^{\circ}$    & (2)\\ 
	  \hline
\multirow{3}*{Satellite} &Brightness Frac.     & 8$\%$& (3)\\
                     &Mass ratio           &0.5--0.03\tablefootmark{a}  & (2)\\
                     &Diameter             &280--640~km\tablefootmark{b}                &(2)\\
\hline
\end{tabular}
\tablefoot{\tablefoottext{a}{Assuming an albedo ratio of resp. .5 and .1 and equal densities.}
\tablefoottext{b}{Assuming an albedo ratio of resp.~1. and .5 and equal densities.}}
\tablebib{References are: (1) \cite{Noll+08}, (2) \cite{Brown+10}, (3):
    \cite{Brown08}.}
\end{table}