\begin{table}%t7
  \caption{Structural parameters of Mkn 1087 and the brightest galaxies and objects associated with it. }  \label{table7}  
%\centerline
{
  \begin{tabular}{cccccccc}
    \hline\hline
   Member &   U.C.$^a$& $\mu_{B,0}$& $\alpha_B$ (kpc) & $\mu_{V,0}$& $\alpha_V$ (kpc) & $\mu_{R,0}$& $\alpha_R$ (kpc) \\
    \hline
 	Mkn 1087 & yes&  17.36     &  1.63	& 17.34  &  1.72   & 16.85  &  1.55  \\
	KPG 103a & yes&  18.98     &  1.64  & 19.78  &  2.44   & 18.77  &  1.76 \\
	N. comp. & yes&  20.91     &  1.22	&\nodata & \nodata & 20.89  &  1.22   \\
	\#3      &  no&  21.93     &  1.42	&\nodata & \nodata & 21.52  &  1.41   \\
\hline
  \end{tabular}}
  \medskip
  $^a$ Underlying component.
 \end{table}