Optical lightcurves of Sylvia (gray dots), compared with the synthetic lightcurves generated with the ADAM and MPCD shape models (blue and orange lines). In each panel, the observing date, number of points, duration of the lightcurve (in hours), and RMS residuals between the observations and the synthetic lightcurves from the shape model are displayed. In many cases, measurement uncertainties are not provided by the observers but can be estimated from the scatter of measurements.