Distances over time for all Gaussian model components required to fit the total intensity visibility data of all analyzed MOJAVE epochs (gray). In color, we only show model components describing the polarized features A (blue) and B (green), if their polarized flux density exceeds the given threshold of 1.4 mJy (3σ). In casesof components that are tracked over more than four epochs, we set a threshold of 1.0 mJy (2σ). The two leading components A 2 and B 2 are highlighted with large, filled squares. The two components A 3 and B 3 that form in the wake of these leading components during the first epochs of the features A and B, but fade quickly, are denoted as stars. We do not trace in detail the evolution of components in the wake of B 2 after 2011.4 due to the increased complexity of the polarized brightness distribution that cannot entirely be described by ballistic Gaussian model components.