Wednesday, March 6, 2013

Secondary Craters


This image above shows a common pattern of secondary craters. Secondary craters are formed when blocks of material are thrown out during the formation of an impact crater. The material that impacted the surface to form these secondaries likely originated from the creation of the crater Degas.

Date acquired: November 28, 2012
Image Mission Elapsed Time (MET): 262575756
Image ID: 3038775
Instrument: Narrow Angle Camera (NAC) of the Mercury Dual Imaging System (MDIS)
Center Latitude: 39.68°
Center Longitude: 231.8° E
Resolution: 24 meters/pixel
Scale: This image is ~27 km ( ~17 mi.) across.
Incidence Angle: 61.4°
Emission Angle: 16.6°
Phase Angle: 78.1°

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

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