Relative astrometry of WISE J0720−0846 after conversion of the positions from DSS, SSS, DENIS, CMC, and WISE to a common system represented by 2MASS (points with error bars; see Table 1 and text) and the combined proper motion and parallax solution (curve, see Table 2). Dashed lines show the displacements of observed positions relative to the fit. The panels show (from top to bottom) observations from 1955, 1981−1990, 1998−2004, and 2010, respectively.