\begin{table}%t5
%\centering
\par
\caption{\label{tab5}Electron temperature indicators in NGC~2792.}
\small
\begin{tabular}{lcccc}
\hline
\hline
Ion & Ioniz. & Lines& Observed & $T_{{\rm e}}$\\
 & Pot.(eV)& Used &Ratio  & (K) \\
\hline
\ion{[S}{iii}] & 23.3 & 6312/18.7 & 0.171 & 16~500 \\
\ion{[Ar}{iii}] & 27.6 & 7135/21.8 & 24.0 & 13~000\\
\ion{[O}{iii}] & 35.1 & 4363/5007 & 0.0177 & 14~000\\
\ion{[O}{iii}] & 35.1 & 1663/5007  & 0.0557 & 15~800\\
\ion{[Ne}{iii}] & 41.0 & 3868/15.5 & 1.45 & 13~800\\
\ion{[O}{iv}]  & 54.9 & 1400/25.9  & 0.40 & 20~000\\
\ion{[Ne}{v}] & 97.1 & 3425/24.3 & 1.0  & 20~000\\
\hline
\end{tabular}
\end{table}