Examples of haloes from the m₉ simulation with more than 50 satellite galaxies (with bound dark matter mass in the range 1.3 to 2.4×10¹⁵ M_⊙). The red crosses denote the positions of galaxies with the ellipse calculated using these positions shown in orange. The black ellipse is the corresponding dark matter ellipse. The lines show the orientation angles of the ellipses. All ellipses shown are derived from projected shapes. The positions are centred on the Centre of Potential (COP, position of the most bound particle) of the (sub)halo.