Wide-field composite images of 252P from the multiband OAO data. In each panel, the observation date and 5′ scale bar are given at the top and bottom left, respectively. Denotations of arrows are identical with those in Fig. 2. North is up, and east is to the left. Green, blue, and red hues represent the fluxes in the g′, R_C, and I_C bands, respectively. We note that the applied photometric aperture size of 1000 km in radius during this period decreased from 33.6′′ to 2.5′′, which is much smaller than the field of view of each panel.