g – r color map (left panel) and polarization map in the r-sdss filter (right panel) of comet C/2011 KP36 (Spacewatch) observed on November 25, 2016 at the phase angle 9.6°. Corresponding scale bars in magnitude for the color map and in percentage for the polarization map are displayed at the top of the images. The location of the optocenter is marked by a black cross, jets by black lines, and the possible shell and arcs are indicated by white dotted lines. The arrows point in the direction to the Sun (⊙), north (N), east (E), and the negative velocity vector of the comet as seen in the observer’s plane of sky (V). Negative distance is in the solar direction, and positive distance is in the antisolar direction.