Very late-time HST imaging of GW170817. Images are 5 arcsec per side and the filter and rest-frame days since GW170817 are indicated in each sub-figure. An isophotal elliptical model of the smooth galaxy light has been subtracted from each figure (see the text) and the images have been Gaussian-smoothed to aid the eye. Dashed circles, centered on the location of GW170817, from alignment with earlier HST epochs, are 0.″25 radius. North is up and east is left.