\begin{table}%t5
\caption{Weak diatomic and atomic UV lines: CH, CH$^+$, \ion{Ca}{i}, \ion{K}{i} and \ion{Na}{i} 
toward \mbox{\object{AzV 456}}. The spectral lines are shown in Fig.~\ref{fig:diatomics}.
Central velocities~$v$ (\kms), equivalent widths~{\it EW} (m\AA) and column densities~log~$N$~(cm$^{-2}$) are listed.}
\label{tb:UVlines}
\small%\centerline
{
\begin{tabular}{llllll}\hline\hline
%&&&&& \\[-8pt]
Species		& $\lambda_{\rm rest}$ & $f$         & $v$        & {\it EW}	     & 	log $N$$^4$   \\
		& (\AA)	               &  	     & (\kms)     & (m\AA)   &  (cm$^{-2}$)    \\\hline
%&&&&& \\[-8pt]
CH		& 4300.303             & 0.0053$^3$ &	123          & 22.0     &  13.40	                  \\
CH$^+$		& 4232.548             & 0.0056$^3$ &	             & $\la$1  &  $\la$12.05    \\
\ion{Ca}{i}	& 4226.728             & 1.77$^1$   &  123  	  & $\la$2  &  $\la$9.85     \\
\ion{K}{i}	& 4044.142             & 0.00608$^2$&  126  	  & 4.6	     &  12.72	       \\
		& 4047.213             & 0.00305$^2$&  121  	  & 1.7	     &  12.58	       \\
\ion{Na}{i}	& 3302.37              & 0.00900$^3$&  122  	  & 23.0     &  13.42	       \\
		& 3302.98              & 0.00446$^3$&  123  	  & 16.5     &  13.58	       \\\hline
\end{tabular}}	 				 \medskip
$^1$ G. Risberg (1968); $^2$ NIST Atomic spectra database (P. Risberg, 1956);  $^3$ Morton (2003); $^4$ Welty et~al. (2006) find log $N$~= 13.60, $\la$12.40 and 12.47 for CH, CH$^+$ and CN, respectively.
\end{table}