Friday, August 26, 2011

Double Ring Impact Basin


This image shows a double ring impact basin with a smaller, younger crater superimposed on its rim. Larger impacts, such as the one that created this basin, form ring structures instead of central peaks.

Date acquired: June 02, 2011
Image Mission Elapsed Time (MET): 215511113
Image ID: 329264
Instrument: Narrow Angle Camera (NAC) of the Mercury Dual Imaging System (MDIS)
Center Latitude: -80.35°
Center Longitude: 212.0° E
Resolution: 255 meters/pixel
Scale: The large impact crater is ~165 km (102 mi) in diameter.
Incidence Angle: 81.6°
Emission Angle: 0.9°
Phase Angle: 82.2°

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

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