Separation (left) and position angle (right) of 2M0103(AB)b relative to the AB barycenter as functions of time. Triangles are data points from Delorme et al. (2013) and the square in each panel is the astrometry from our AstraLux image. Red lines correspond to the motion that 2M0103(AB)b would exhibit if it were a static background star, which can be firmly excluded. There is also significant orbital motion between the first epoch in 2002 and the later epochs.