Uncertainty on the semi-major axis for orbits obtained by occultations only, as a function of the same uncertainty but including all traditional observations. Each circle represents an asteroid, whose colour is related to the number of available occultations. The straight line is the bisector where the two uncertainties are equivalent. The right panel illustrates the situation at the time of DR2 release, to be compared with Fig. 6 in Spoto et al. (2017). The right panel corresponds to the same objects, but with the up-to-date situation and EDR3 stellar astrometry.