Rachmaninoffs Ejecta
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Rachmaninoff's Ejecta

August 20, 2013
Date acquired: August 03, 2012 Image Mission Elapsed Time (MET): 252467209, 252467201, 252467205 Image ID: 2319964, 2319962, 2319963 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: 21.46° Center Longitude: 48.83° E Resolution: 180 meters/pixel Scale: Image Width: 242 km (150 mi) Incidence Angle: 33.9° Emission Angle: 0.2° Phase Angle: 34.0° Of Interest:This image is located just off the edge of Rachmaninoff's ejecta blanket, and many of the craters in this image formed as secondary craters when Rachmaninoff's ejecta impacted the surrounding terrain. A chain of small secondary craters is also present along the bright swath at the top right; these are most likely from a smaller, more distant impact to the north. This image was acquired as part of MDIS's high-resolution 3-color imaging campaign. The map produced from this campaign 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. During the first two years of orbital operations, MESSENGER acquired over 150,000 images and extensive other data sets. MESSENGER is capable of continuing orbital operations until early 2015. Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington

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