\begin{table}%t4
%\centering
\par
\small  \caption{Globular/Open Clusters, literature values. 
    The selection constraints applied for identification of likely members are
    labeled with $*$.}\label{t_GC}
  %\begin{center}
\par
    \leavevmode
        \begin{tabular}[h]{lccccccrr}
        \hline\hline  
    Cluster & ${\rm RA, Dec}$ (epoch J2000) & ${\rm RA^*}$ & ${\rm Dec^*}$ & 
    ${\rm [Fe/H]}$& age & $m-M$ & {\it RV} & {\it RV}$^*$\\
            & &(degree) & (degree) & (dex) & (Gyr) &  & ${\rm (km~s^{-1})}$ & ${\rm
              (km~s^{-1})}$ \\ 
        \hline \\[-8pt]
    ${\rm M~15}$ &$21^{\rm h}29^{\rm m}58.3^{\rm s}$, $+12^\circ10\arcmin01\arcsec$ & $322.25,322.75$ & $11.90,12.40$ & $-2.22$ &
    $13.2$ & $14.93$ & $-110$ & $-126,-100$ \\
    ${\rm M~13}$ &$16^{\rm h}41^{\rm m}41.5^{\rm s}$, $+36^\circ27\arcmin37\arcsec$ & $250.00,250.90$ & $36.10,36.90$ & $-1.70$ & $12.7$ & $14.07$ & $-250$ & $-262,-243$\\
    ${\rm M~2}$  &$21^{\rm h}33^{\rm m}29.3^{\rm s}$, $-00^\circ49\arcmin23\arcsec$ & $323.10,323.60$ & $-1.05,-0.60$ & $-1.53$ & $13.0$ & $10.49$ & $0$ & $-20,20$\\
    ${\rm NGC~2420}$ &$07^{\rm h}38^{\rm m}24.0^{\rm s}$, $+21^\circ34\arcmin27\arcsec$ & $114.40,115.10$ & $21.20,22.10$ & $-0.50$ & $3/4$ & $11.40$ & $73$ & $50,86$\\ 
\hline  
       \end{tabular}
  %\end{center}
\par
\end{table}