Positions of the QSC within the six time intervals, 1995.57−1999, 1999−2002, 2002−2005.71, 2005.71−2010.9, 2013.24−2020 and 2020−2022.22. The blue plus sign is the median position of the QSC positions within the given time interval. The dashed blue line is the axis of the jet connecting the core and the median position of QSC. The dashed red line is the central axis of the jet, connecting the median position of QSC over the entire observation period 1995.57−2022.22 and the core. The sizes of the crosses correspond to QSC position errors in the directions toward of and across the core.