Four-image montage comprising images taken by Rosetta’s navigation camera on 15 October from a distance of 9.9 km from the centre of Comet 67P/Churyumov-Gerasimenko. The image scale is about 0.63 metres/pixel, so each 1024 x 1024 pixel frame making up the montage is about 650 metres across.
The individual image frames and more information is available via the blog: CometWatch at 10 km.