Data versus model D5 (Table 3) for planets b, c, and d from top to bottom: to show the temporal evolution of the planet’s orbits, the colour of the data and the model changes from blue to red over the observational baseline to visualise the non-Keplerian orbit due to the planet-planet interaction noticeable as a phase shift. A similar figure, but separated into observing seasons is shown in Fig. D.2.