Residuals with respect to an orbital fit to Gaia DR2 asteroid astrometry (green), compared to a fit to occultations (blue). 510 asteroids for which the orbit have been computed are present in the Gaia DR2 and are used to build the blue curve. The whole sample published in Gaia DR2 is used for the green curve. Here, we consider residuals oriented along the two directions of better accuracy for both Gaia (along-scan direction) and occultations (AL). The curves represent the average, while the shaded areas encompass the 1-sigma level quantile. Statistics are not shown for V < 10 due to the very reduced sample in that range.