Comparison of fits of the convex-light-curve-inversion and best-fit radar shape models of asteroid (85990) 1999 JV6 to an example subset of the radar imaging data (the model is summarised in Table 3). Each five-image subpanel is made of: plane-of-sky projection of the convex-light-curve-inversion model (sky 1), the synthetic echo generated using the convex model (fit 1), the observational data (data), echo simulated from the radar best-fit model (fit 2), and plane-of-sky projection of the radar best-fit model (sky 2). The convex model was scaled to have approximately the same volume as the radar model. While the convex-light-curve-inversion model reproduces the light-curve data fairly well (which are fully illustrated in Fig. A.1) and even some general shape properties seen in the radar echoes it fails to reproduce the obvious bifurcation of JV6. On the data and synthetic-echo images the delay increases downwards and the frequency (Doppler) to the right. The plane-of-sky images are orientated with celestial north (in equatorial coordinate system) to the top and east to the left. The principal axes of inertia are marked with coloured rods (red for axis of minimum inertia, green for intermediate axis), and the rotation vector (Z-axis of body-fixed coordinate system, roughly aligned with axis of maximum inertia) is marked with a purple arrow. We highlight the fact that the rotation axis and Z-axis of the bodyoverlap with the axis of maximum inertia. The images were taken, from top to bottom, with: Goldstone on 2016-01-08 08:46:38, Goldstone and GBT on 2016-01-09 06:18:39, Goldstone+GBT on 2016-01-12 06:58:17, Goldstone+GBT on 2016-01-12 08:10:03, Arecibo on 2016-01-17 03:52:07.