Relative difference in COCD and MWSC estimates of r_c and r_t radii as function of MWSC heliocentric distance (d). Red lines show average differences and yellow stripes are respective standard deviations. Statistical parameters were computed with the help of data marked with filled circles, open circles are omitted as 3-σ outliers (24 and 13 for r_c and r_t, respectively). Vertical bars are fit errors.