Velocity of a marginally bound point mass (zero total energy, i.e., nearly parabolic orbit) in a static Navarro-Frenk-White (NFW) halo with the concentration parameter c = 5 and virial velocity V_vir = 1263 km s⁻¹ as a function of radius (black curve). The red points show the LOS velocities (v_los) and projected distances r_p of the radio galaxies IC310 and NGC 1265. The green line shows the circular velocity at a given radius. The pair of blue curves shows the expected LOS velocity of a point mass on a radial trajectory as a function of 3D radial distance from the center for the known projected radii of these two galaxies. For IC310, its small LOS velocity is fully consistent with being almost in the picture plane, i.e., the projected distance can be almost equal to the true 3D distance from the cluster core. For NGC 1265, the two vertical cyan lines show the allowed range of 3D distance, set by the requirement that the observed LOS velocity is smaller than the 3D velocity of a marginally bound point mass.