Spatial distribution of all observed objects. Red triangles are cluster GCs/UCDs, blue crosses mark background objects. Small black dots are foreground stars, and small grey dots are objects for which no radial velocity could be determined. The large green asterisks are major cluster galaxies with apparent magnitudes R < 14 mag from the spectroscopic study of Christlein & Zabludoff (2003). The large dotted circle indicates the projected cluster core-radius of r_c ~ 170  h^-1 kpc (Girardi et al. 1995), adopting h = 0.75. The dashed circle marks a radius of 5′ around NGC 3311.