Azimuthally averaged surface brightness profiles of comets with V-filter images. Quantities represented by symbols and lines are the same as in Fig. 1. The telescope tracking for the 43P/Wolf–Harrington image was superior to that of its R-filter counterpart. The V-filter brightness profile is unambiguously more diffuse than the background PSF, indicating an active nucleus. Comets 133P/Elst–Pizarro and 143P/Kowal–Mrkos display a stellar-like appearance, consistent with their R-filter images.