Best-fit orbital solution from orbitize using relative astrometry for Z CMa (Table E.1). Left panel shows one orbit (purple line, color-coded per year as shown in the color bar) with the relative astrometry of the FUor companion (orange points) and the location of the HBe star (asterisk). Right panels show the solution of the same orbit (gray lines) against the angular separation (top) and PA (bottom) that is also included in the left panel.