Fig. 3

Best-fit Euler angles of \(\theta _y\) (a) and \(\theta _x\) (b) in time series for early major observations derived from the geometric correction. (c) Difference of the observed point between before and after the correction results shows in the Ryugu’s geographic coordinate; the Euler angle before the correction is the inverse frame of the Hayabusa2 y-frame \((\theta _z, \theta _y, \theta _x) = (0^\circ , -180^\circ , 0^\circ )\). This figure implies the relative difference between the TIR frame and the Hayabusa2 frame