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Fig. A.2


Model fitting of the kinematics for knot k: trajectory Zn-Xn, core separation rn(t), coordinates XN(t) and Zn(t), the modeled apparent velocity/viewing angle and Lorentz/Doppler factor. In each of the upper plots, two additional model curves (red and green) are also shown for ejection epochs t0 + 0.3 yr and t0−0.3 yr (t0 = 2010.88), demonstrating that most of the observational data points are within the regions confined by the two curves and that the precession period is determined with an uncertainty of ~0.3 yr.

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