\begin{table}%T5
\caption{\label{Ha}Comparison between IC~4662 H$\alpha$ fluxes from the 
literature. Inferred intensities, luminosities and  Lyman continuum 
fluxes, follow from an adopted distance of 2.44~Mpc, and include
3~cm radio continuum derived ionizing flux from \citet{Johnson2003}. }
%\centerline
 {
\begin{tabular}{l@{\hspace{1.5mm}}c@{\hspace{1.5mm}}c@{\hspace{1.5mm}}c@{\hspace{1.5mm}}c@{\hspace{1.5mm}}c@{\hspace{1.5mm}}c@{\hspace{1.5mm}}c@{\hspace{1.5mm}}r}
\hline\hline
                       & $\theta^{\ast}$ &
$F$(H$\alpha$+[N~{\sc ii}])     & $F$[N~{\sc ii}]/$F$(H$\alpha$) &  
$E(B-V)$  & 
$I$(H$\alpha$) &  $\log L$(H$\alpha$)    & $Q_0$  \\
  & (arcmin) & (erg s$^{-1}$ cm$^{-2}$) &                 
& (mag) & (erg s$^{-1}$ cm$^{-2}$) & (erg s$^{-1}$)   & 
(10$^{49}$ s$^{-1}$)  \\
\hline\\[-3.2mm]
\citet{Kennicutt1983}  & 2\phantom{.0} & $7.9\times10^{-12}$             & 
0.05           & 0.00 & $7.6\times10^{-12}$     & 39.73   &  \phantom{0}400  \\
\citet{Lonsdale1987}   & 2\phantom{.0} & $7.9\times10^{-12}$     & 0.05     & 0.43
& $2.1\times10^{-11}$      & 40.17                &  1100 \\
%\citet{Hidalgo2001}    & $5.1\times10^{-12}$    &    --        & 0.03           
%& 5.0\times10^{-12}$      & 0.14     & 39.52                &  244  \\
\citet{Helmboldt2004}  & 2:\phantom{0}  & $1.4\times10^{-11}$   &  0.05   &  0.29:
&  $2.6\times 10^{-11}$ & 40.28 & 1410 \\ 
\citet{Hunter2004}     & 2.2  & $1.4\times10^{-11}$ &  0.00    & 0.16
& $2.1\times 10^{-11}$ & 40.17 & 1110 \\
\citet{Kennicutt2008}  & 2\phantom{.0} & $1.1\times10^{-11}$            & 
0.08           & 0.07
& $1.2\times10^{-11}$      & 39.92                & \phantom{0}615 \\
This study             & 0.2 & $5.1\times10^{-12}$       & 0.03           
& 0.16 & $7.2\times10^{-12}$     & 39.71                &  
\phantom{0}380  \\
\citet{Johnson2003}    &         1:\phantom{0}   &               &                
&                            &          &                      & \phantom{0}530 \\
\hline
\end{tabular}}
\medskip
\par
{$^\ast$ Approximate aperture radii.}
\end{table}