This region in Mercury's northern mid-latitudes shows the the rays of the crater Hokusai, along with the bright rays of a much smaller crater in the southeastern portion of the image. Rays are produced when material is excavated from a crater and "thrown" across the surface of a planet. The "butterfly" pattern of the smaller rayed crater is believed to be created during very low-angle impacts where material is ejected in an asymmetrical pattern.
Date acquired: February 01, 2013
Image Mission Elapsed Time (MET): 2001682, 2001674, 2001678
Image ID: 3436082, 3436080, 3436081
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: 47.96°
Center Longitude: 7.84° E
Resolution: 131 meters/pixel
Scale: The crater along the southwestern edge of the image is 12.3 km in diameter (7.6 miles).
Incidence Angle: 48.0°
Emission Angle: 0.1°
Phase Angle: 47.9°
Photo credit: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington
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