\begin{table}%t1
\caption{NGC~5218: adopted properties.}\label{facts}
\small%\centerline
{
\begin{tabular}{lr} 
\hline \hline
Parameter & Value\\ 
\hline  
Center Position (J2000)... &  $ \alpha ~  13^{\rm h} 32^{\rm m}
10.4^{\rm s}, \delta ~ 62^{\circ} 45' 39''  $  \\
CO-peak (J2000)............. & $ \alpha ~ 13^{\rm h} 32^{\rm m}
10.3^{\rm s}, \delta ~ 62^{\circ}\ 46' 04.0'' $ \\
Morphological type$^{a} $.......... & SBb pec \\
Systemic velocity............... & 2880 \kms \\ 
Distance$^{b} $.......................... & 39 Mpc \\
One arc second equals$^{b} $ & 189 pc \\
Position angle................... & $78^{\circ} $ \\
$L _{\rm IR} ~^{c} $.................................. & $ 3.1 \times
10^{10}~L_{\odot} $ \\
H{\sc i}$^{d} $................................... & 3.9--7.7 Jy~\kms \\
Adopted inclination$^{e} $.........& $45^{\circ} $ \\
Adopted conversion factor$^{\rm f}$ & $2.3 \times 10^{20} $
$\cmmt $ (K \kms)$^{-1} $ \\
Adopted velocity convention & Radio  LSR \\
Line ratio, ${^{12}\rm CO / ^{13}\rm CO}^{c} $....& 9 \\ 
\hline  
\end{tabular}}
\medskip 
$^a$ Hubble (\cite{Hubb26}).
$^b$ For $H=$ 75 \kms~\permpc. 
$^c$ Aalto \etal\ (\cite{Aalt91}).
$^d$~Haynes \& Giovanelli (\cite{Hayn91}), Theureau \etal\ (\cite{Theu98}).
$^e$ Derived from the ratio of the minor to major axis as defined in the RC3
catalog.  
$^f$~Arimoto \etal\ (\cite{Arim96}).
\end{table}