Sol 4200 (!), November 17, 2015. After a number of sols with only solar observations to measure dust opacity in the atmosphere, Opportunity returned to imaging its surroundings. Local time was late afternoon. Above is a three-frame Navcam view looking southeast (click to enlarge). At right, a false-color Pancam (Holger Isenberg), and at bottom is a Navcam pair examining the ground in front of the rover (click to enlarge).
Opportunity raw images, its latest mission status, a location map. and atmospheric opacity, known as tau.