\begin{table}%t1
\caption{\label{tab1}Data of the cluster A~3558 as given in the ACO (Abell et~al. 1989) catalogue.}
\small%\centering
\par
\begin{tabular}{ll|ll}
\hline\hline
  Parameters &   Properties  &    Parameters    &   Properties        \\
\hline
%\noalign{\smallskip}
  RA (2000)       & $13^{\rm h}27^{\rm m}54\fs0$  &  {\it RV} (km s$^{-1}$)& 14~390 \\
  Dec (2000)       & $-31\degr29\arcmin00\arcsec$  &  B-M type          & I       \\
  $l$               & $311.99\degr$                 &  R-C type          & R       \\
  $b$               & $30.73\degr$                  &  $m $                  & 15.1     \\
  $L$                 & $148.87\degr$                 &  $R$                 & 4        \\
  $B$                 & $-1.37\degr$                  &  $D$                 & 3      \\
\hline
\end{tabular}
\end{table}