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Fig. 1

image

OSIRIS NAC images used in this work. All the images are oriented North up and east to the left. The lower labels in each image indicates the observation date. All images are 30 × 35 pixels. Their spatial dimensions at the comet can be calculated using the spatial resolution indicated in the last column of Table 1. The straight features near the diagonals in the uppermost first and third panels from the left are artifacts.

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