This composite (click to enlarge in a new tab) shows the south side of Swann Hill, which stands at the head of Marathon Valley. These false-color images were created by Holger Isenberg from filtered Pancam images taken on sols 4081 to 4083 (July 18-20, 2015). Shooting into the Sun to record dark rocks is a photographic challenge, but the images reveal what appears to be a striated texture in many of the rocks. This may be etching by dust grains blown out of Endeavour Crater’s interior, which lies out of view, downslope to the right.
Opportunity raw images, its latest mission status, a location map. and atmospheric opacity, known as tau.