Saturday, August 10, 2013

Impact Craters and Low-Reflectance Materials


Despite the relatively low (1.6 km/pixel) resolution of this image, some clear differences are visible between the the relatively blue, low-reflectance material (LRM) and the nearby terrain. While one large crater near the center left of the image excavates LRM, another to the north has exposed a brighter, redder deposit, suggesting this region is home to compositions that are heterogeneous on a very local scale.

Date acquired: September 21, 2011
Image Mission Elapsed Time (MET): 225100792, 225100800, 225100794
Image ID: 788077, 788082, 788078
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: 22.29°
Center Longitude: 21.46° E
Resolution: 1587 meters/pixel
Scale: Image Width 567 km (350 mi)
Incidence Angle: 34.1°
Emission Angle: 0.2°
Phase Angle: 33.9°

Photo credit: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington

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