Comparison of three VLBA epochs at 8.4 GHz in 1995, 2007, and August 2017 (left to right). Images are spaced horizontally by a distance proportional to the time separation. Contours are traced at ±(1, 2, 3, 8, 16, …)×1.5 mJy beam⁻¹. The colored lines trace the central position of the NW jet (blue), SE jet (red), and core (green), respectively. All the images are convolved with the same circular beam (shown in the bottom left corner), whose full width at half-maximum is 1.2 mas.