Radial distances r(t) of the moving components C1 to C4. The top panel shows the distances for all the components. The bottom panel shows the same information, but zoomed in smaller regions of time and radial distances to highlight C1 and C2. The empty circles represent model-fit but not uniquely identified components in both panels (see Sect. 3.2). The dashed green and red lines display linear models of r(t) fit to the data of C1 and C2, respectively. The light and dark gray regions indicate the timing of the ejection of C2 from the VLBI core (C0), MJD 59384.1±34.5, and the passage of C1 through C2, MJD 59575.53±50.41. The vertical dashed dark line corresponds to the timing of IceCube-211208A.