Mock-observed satellite systems around Cen A analogs from the Illustris TNG-100 simulation, considering both its dark-matter-only run (left) and hydrodynamical run (right). The vertical axis plots the number of kinematically correlated satellites N_corr, with N_corr = 21 for the observed Cen A system. The horizontal axis plots the on-sky axis-ratio flattening b/a. The histograms show the number of realizations with a given axis ratio N(b/a) and a given number of correlated velocities N(N_corr), respectively. The color maps indicate the density of simulated systems, while the contours indicate what fraction of simulated systems are more extreme than the parameter combination. The green shaded regions indicate parameter combinations that are as extreme or more as the observed Cen A system, while f_flat, f_corr, and f_both report the fraction of mock systems that are at least as flattened as the observed system, at least as kinematically correlated, or both simultaneously.