\begin{table}%t1
\caption{\label{tab.param}Parameters for NGC 6822.}
\begin{tabular}{l  r}
\hline \hline \noalign{\smallskip}
$\alpha_{\rm o}$(J2000)\tablefootmark{a} & $19^{\rm h}44^{\rm m}57\ \fs83$\\
$\delta_{\rm o}$(J2000)\tablefootmark{a}& $-14\degr48\arcmin11\arcsec $\\
Distance\tablefootmark{b} & $490\pm40$~kpc\\
$V_{{\rm LSR}}$ & $-47$~$\kms$\\
Metallicity\tablefootmark{c} & $\simeq$$0.3~{Z}_{\sun} $\\
Total optical luminosity\tablefootmark{b} & $\sim$$9.4 \times 10^7~{L}_{\sun}$\\
Total \ion{H}{i} mass\tablefootmark{d} & $1.34\times10^8~{M}_{\sun}$\\
Dynamical mass\tablefootmark{e} & $3.2 \times10^9~{M}_{\sun}$\\
\hline
\end{tabular}
\tablefoot{\tablefoottext{a}{(0, 0) offset of our HERA CO(2-1) map.}
\tablefoottext{b}{\citet{Mateo:1998}.} 
\tablefoottext{c}{\citet{Skillman:1989,Lee:2006}.} 
\tablefoottext{d}{\citet{de-Blok:2006a}.} 
\tablefoottext{e}{\citet{de-Blok:2006a,Weldrake:2003}.}}
\end{table}