Tuesday, March 19, 2013

Impact Crater Wall Terraces


Wall terraces are landforms common to impact craters and basins across Mercury. The fault-bound cliff in this image forms part of the wall of an unnamed peak-ring basin (which also hosts hollows). The low-angle lighting in the scene creates dramatic shadows at the base of the rim terrace, which is almost 1.5 km (1 mi.) high.

Date acquired: February 13, 2013
Image Mission Elapsed Time (MET): 3038847
Image ID: 3509826
Instrument: Narrow Angle Camera (NAC) of the Mercury Dual Imaging System (MDIS)
Center Latitude: 42.20°
Center Longitude: 292.10° E
Resolution: 22 meters/pixel
Scale: The field of view in this image is approximately 20 km (12 mi.) across
Incidence Angle: 73.6°
Emission Angle: 9.8°
Phase Angle: 63.8°
(North is down in this image.)

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

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