Past dynamical evolution of C/2010 S1 nominal orbit (‘pa’ solution, see the CODE Catalogue). Changes in the perihelion distance (green), inclination (fuchsia), and the argument of perihelion (red) are shown; angular elements are expressed with respect to the Galactic disc frame. The thick lines show the result of the full dynamical model, while the thin lines show the evolution of elements in the absence of any stellar perturbations. The panel on the left – all stars included, the panel on the right - all stars included, except HD 7977 (P0230 in the plot). In both panels, noticeable changes in the perihelion distance are marked with arrows accompanied by the name of the corresponding stellar perturber (see Table 5).