Four-image montage comprising images taken by Rosetta’s navigation camera on 18 October from a distance of 9.8 km from the centre of Comet 67P/Churyumov-Gerasimenko (about 7.8 km from the surface). The image scale is 66.5 cm/pixel, so each 1024 x 1024 pixel frame making up the montage is about 680 metres across.
The individual image frames and more information is available via the blog: CometWatch – 18 October