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NASA's Mars Exploration Rover Opportunity used its panoramic camera in a super-resolution technique to record this eastward view of the horizon on the 2,298th Martian day, or sol, of the rover's work on Mars (July 11, 2010).

Rising highest above the horizon in the right half of the image is a portion of the western rim of Endeavour Crater including a ridge informally named "Cape Tribulation" (see Figure 1).

Super-resolution is an imaging technique combining information from multiple pictures of the same target in order to generate an image with a higher resolution than any of the individual images.

Endeavour Crater is about 22 kilometers (14 miles) in diameter. The rover team chose Endeavour as a long-term destination for Opportunity in mid-2008, after the rover had investigated the much-smaller Victoria Crater for two years. More than a year later, observations by the Compact Reconnaissance Imaging Spectrometer on NASA's Mars Reconnaissance Orbiter revealed clay minerals on Endeavour's western rim, making the destination even more enticing for Opportunity's investigation. Cape Tribulation is one location where the clay minerals are exposed.

Opportunity completed its three-month prime mission in April 2004 and has continued working in mission extensions since then.