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Fig. 4

image

Processed images of comet 67P/C-G observed in R-band with the NOT show main evolution steps of the coma morphology. All images have celestial north pointing up and the direction of the Sun indicated with an arrow. A heliocentric distance r of the target and a spatial scale of the image at the moment of observation is presented in a right-hand corner of each image. The scale is given as the length of a 100-pixel-long white line projected to the distance of the target. Color scale is arbitrary and does not reflect the absolute brightness of the object.

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