Ephemeris plots for Quaoar. The black lines again show the difference between NIMA and JPL. Gray regions are NIMA ephemeris uncertainties, and the yellow dots are astrometric positions from stellar occultation events. The black and blue dots are the object positions from classical astrometry. In the upper panels, we show the northern astrometric solution from Table 3. In the lower panels, we used the southern solution. The northern portions (upper panels) fit the ephemeris better, including the other yellow dots, allowing us for choosing this one as our preferred position.