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October 4, 2012
Date acquired: August 20, 2012 Image Mission Elapsed Time (MET): 253964972, 253964964, 253964968 Image ID: 2426454, 2426452, 2426453 Instrument: Wide Angle Camera (WAC) of the Mercury Dual Imaging System (MDIS) WAC filters: 9, 7, 6 (996, 748, 433 nanometers) in red, green, and blue Center Latitude: 26.78° Center Longitude: 301.6° E Resolution: 166 meters/pixel Scale: The flooded crater towards the upper left of the image is approximately 25 km (16 mi.) across. Incidence Angle: 61.7° Emission Angle: 0.2° Phase Angle: 61.6° Of Interest: This enhanced-color scene lies on the edge of Praxiteles, a peak-ring basin approximately 200 km in diameter. The high-reflectance, redder areas are irregularly shaped pits likely formed by volcanic activity, and the high-reflectance, bluer areas are hollows. Pits and hollows are often found together on Mercury. Their relationship to one another is the subject of ongoing investigation by the MESSENGER team. This image was acquired as part of MDIS's high-resolution 3-color imaging campaign. The 3-color campaign is a major mapping activity in MESSENGER's extended mission. It complements the 8-color base map (at an average resolution of 1 km/pixel) acquired during MESSENGER's primary mission by imaging Mercury's surface in a subset of the color filters at the highest resolution possible. The three narrow-band color filters are centered at wavelengths of 430 nm, 750 nm, and 1000 nm, and image resolutions generally range from 100 to 400 meters/pixel in the northern hemisphere. The MESSENGER spacecraft is the first ever to orbit the planet Mercury, and the spacecraft's seven scientific instruments and radio science investigation are unraveling the history and evolution of the Solar System's innermost planet. Visit the Why Mercury? section of this website to learn more about the key science questions that the MESSENGER mission is addressing. During the one-year primary mission, MESSENGER acquired 88,746 images and extensive other data sets. MESSENGER is now in a yearlong extended mission, during which plans call for the acquisition of more than 80,000 additional images to support MESSENGER's science goals. Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington


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