Single frame enhanced NavCam image taken on 17 August 2016, when Rosetta was 13.9 km from the centre of the nucleus of Comet 67P/Churyumov-Gerasimenko. The scale is 1.2 m/pixel and the image measures about 1.2 km across.
The original image and more information is available on the blog: CometWatch – late August round-up