\begin{table}%t2
\caption{\label{tab:cluster_params}Cluster parameters.}
\par
%\centerline
{
\small\begin{tabular}{rl rl l}
\hline
\hline
{NGC} & {[Fe/H]} &   {($m-M$)$_{V}$}  &    {$E$($B-V$)} & {$E$($b-y$)} \\
\hline
6397 &   $-$1.91$^{1,2}$   & 12.19$^{1}$    & 0.179$^{3}$    &   0.127$^{3}$  \\
          &                &                &    $\pm$0.003  &    $\pm$0.002\\
6752 &   $-$1.54$^{1}$     & 12.96$^{1}$     & 0.04$^{1}$   &                         \\
 &       $-$1.61$^{2}$     &                  & 0.05$^{2}$          &               \\
\hline
\end{tabular}}
\medskip
\par
$^{1}$ Zinn\ (\cite{Zinn1985}),\ $^{2}$ Grundhal et al.\ (\cite{Grundahl1999}),
$^{3}$ Anthony-Twarog\& Twarog (\cite{AntonyTwarog2000}).
\end{table}