Four-image montage comprising images taken by Rosetta’s navigation camera on 8 October from a distance of 16.9 km from the centre of Comet 67P/Churyumov-Gerasimenko. The image scale is about 1.25 metres/pixel, so each 1024 x 1024 pixel frame making up the montage is nearly 1.3 km square.
The individual image frames and more information is available via the blog: CometWatch checks up on Cheops