Model-fitting results of the kinematics for knot C32. Bottom panels: the modeled relations between its observed position angle vs. core separation (left) and vs. time (right) are shown. The black lines denote the fitting model and the red lines indicate the precessing nozzle model. The black line and the red line coincide only at their initial parts near the core due to the trajectory curvatures in the outer jet regions. We note that several data points within core separation r_n <  0.3 mas are located close to the modeled precessing common parabolic trajectory.