HiRISE | Russell Crater Dunes, Defrosted (PSP_004038

NASA/JPL/University of Arizona

Russell Crater Dunes, Defrosted
PSP_004038_1255 Science Theme: Seasonal Processes

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The Russell Crater dune field is covered seasonally by carbon dioxide frost, and this image shows the dune field after the frost has sublimated (evaporated directly from solid to gas). There are just a few patches left of the bright seasonal frost.

Numerous dark dust devil tracks can be seen meandering across the dunes. The face of the largest dune is lined with gullies. The source of the gullies is unclear but could involve erosion by the seasonal carbon dioxide ice.
Written by: Candy Hansen (20 October 2010)

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Acquisition date:	07 June 2007	Local Mars time:	3:20 PM
Latitude (centered):	-54.269 degrees	Longitude (East):	12.948 degrees
Range to target site:	253.0 km (158.1 miles)	Original image scale range:	25.3 cm/pixel (with 1 x 1 binning) so objects ~76 cm across are resolved
Map projected scale:	25 cm/pixel and North is up	Map projection:	EQUIRECTANGULAR
Emission angle:	6.1 degrees	Phase angle:	53.4 degrees
Solar incidence angle:	48 degrees, with the Sun about 42 degrees above the horizon	Solar longitude:	252.7 degrees, Northern Autumn
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North azimuth:	96 degrees	Sub-solar azimuth:	24.5 degrees
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North azimuth:	270 degrees	Sub solar azimuth:	197.1 degrees

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For information about NASA and agency programs on the Web, visit: http://www.nasa.gov. NASA's Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, Calif., manages the Mars Reconnaissance Orbiter for NASA's Science Mission Directorate, Washington. Lockheed Martin Space Systems is the prime contractor for the project and built the spacecraft. The HiRISE camera was built by Ball Aerospace and Technology Corporation and is operated by the University of Arizona. The image data were processed using the U.S. Geological Survey’s ISIS3 software.