Stellar flux in Triton’s shadow for the 5 October 2017 event, normalised to unity outside the body (light blue region). The flux reaches a minimum of about 7% of the unocculted flux inside the shadow and then rises sharply at the shadow centre. The direction of Triton’s rotation is indicated, as well as the equatorial rotation velocity, v_rot = 17 m s⁻¹ (in an inertial frame), using the parameters of Table 2.