SPHERE/IRDIS and NACO astrometry of the detected companion relative to the primary star versus time. Position angle is measured from north over east. The grey ribbon shows the expected location of a non-moving background object, while the dashed lines indicate possible circular orbital motion assuming a face-on orbit for position angle and an edge-on orbit for separation independently (these are mutual exclusive orbits to illustrate the maximum expected change in separation and position angle for the circular case).