Graphical illustration of the arcs’ semi-major axis, as well as the radii and widths of the CIR and CER motion resonances 42:43 with Galatea. The orange line depicts the geometrical orbital radius of the arcs, with uncertainties (in black dotted lines) smaller than the thickness of the orange line. The CIR and CER locations and widths are represented in blue and purple, respectively. They represent the interval in the semi-major axis where particles would be trapped by these resonances. This figure clearly shows the mismatch between the 42:43 CIR and the CER with Galatea and the arc’s position. The associated differences in longitude (Δ L) in Table 2 support this conclusion.