Saturday, March 10, 2012

Bright Rayed Crater


This image, taken with the Wide Angle Camera (WAC), shows a bright rayed crater in Mercury's southern hemisphere. The rays, created when target material was ejected out onto the surface during the impact that formed the crater, will gradually fade over time due to the effects of Mercury's harsh space environment. The crater is deep enough that the local surface layers were penetrated, exposing low reflectance material (LRM) beneath.

Date acquired: February 06, 2012
Image Mission Elapsed Time (MET): 237000734
Image ID: 1359421
Instrument: Wide Angle Camera (WAC) of the Mercury Dual Imaging System (MDIS)
WAC filter: 9 (996 nanometers)
Center Latitude: -17.70°
Center Longitude: 67.69° E
Resolution: 414 meters/pixel
Scale: The central rayed crater is 24 km (15 miles) in diameter.
Incidence Angle: 41.2°
Emission Angle: 12.0°
Phase Angle: 52.3°

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

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