It's not in this image[0] which, judging from the PIA number, is either the same or a very close one (temporaly). My guess: since the one I linked has other co

It's not in this image[0] which, judging from the PIA number, is either the same or a very close one (temporaly). My guess: since the one I linked has other colouring artifacts (because Juno rotates, and the camera is a luminance sensor with filter wheels for colours), the thing you spotted is probably an artifact that ocurred when trying to better align the colour channels. [0] https://www.nasa.gov/sites/default/files/thumbnails/image/pia21380.jpg https://www.nasa.gov/sites/default/files/thumbnails/image/pi... Edit: in the top left region of Jupiters disc there are other, similar artifacts to the one you pointed out, which are missing from the "natural colour" image.