Similar to Fig. 5 but now the BH started at R = 1.5kpc on a circular orbit. We note the sharp response of the axi-symmetric disc to the BH, which triggers radial motion. The disc adjusts to the black hole perturbation and settles progressively over several orbital times to a new equilibrium. The BH’s orbit, however, does not migrate significantly over the full integration time. Panel (a): Run of L_z (black solid curve). Radial and azimuthal velocity components are shown in red. Panel (b): Cylindrical radius R (in black) and amplitude of v_• (in turquoise). The dotted line at the bottom is the z-coordinate bound to ±17pc.