Orbiting parent body. Modeling results of the position adjustment of all the structures in the case of an orbiting parent body (nominal case, see Sect. 3.2.1). Left: map averaged over the five references (see text). Right: projected trajectories for the five structures assuming each of the structures is a reference for the fit. This shows that the fits are essentially independent of the assumed reference structure. The black lines are the apparent positions of the parent body.