Fit to the July 22 NIR flare without restricting the phase difference between this night and that of July 28. The colour gradient denotes the evolution of the hotspot as it completes one revolution. The viewer’s inclination, magnetic field geometry, and orbital direction have been fixed to the values found for the July 28 flare. The fit favours values of R₀ ∼ 11 R_g and there is no initial phase difference between the nights (no difference in starting position on-sky), which is out of the allowed uncertainty range for the astrometry.