HiRISE | Fan and Dust Devil in Deuteronilus Mensa (ESP_023671

NASA/JPL/University of Arizona

Fan and Dust Devil in Deuteronilus Mensa
ESP_023671_2270 Science Theme: Landscape Evolution

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This image shows what appears to be a degraded alluvial fan at upper left and a dust devil at lower right.

An alluvial fan is deposited by a river flowing out onto a plain; if this feature was formed by water, the activity ceased long ago, based on the density of craters on the fan surface.

The dust devil, on the other hand, is an example of the ongoing processes that continue to shape the surface of Mars.

Written by: Ken Herkenhoff (7 September 2011)

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Acquisition date:	14 August 2011	Local Mars time:	2:01 PM
Latitude (centered):	46.628 degrees	Longitude (East):	20.657 degrees
Range to target site:	304.5 km (190.3 miles)	Original image scale range:	60.9 cm/pixel (with 2 x 2 binning) so objects ~183 cm across are resolved
Map projected scale:	50 cm/pixel and North is up	Map projection:	EQUIRECTANGULAR
Emission angle:	5.6 degrees	Phase angle:	56.1 degrees
Solar incidence angle:	59 degrees, with the Sun about 31 degrees above the horizon	Solar longitude:	344.8 degrees, Northern Winter
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North azimuth:	96 degrees	Sub-solar azimuth:	311.0 degrees
For map-projected products
North azimuth:	270 degrees	Sub solar azimuth:	126.3 degrees

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All of the images produced by HiRISE and accessible on this site are within the public domain: there are no restrictions on their usage by anyone in the public, including news or science organizations. We do ask for a credit line where possible: Image: NASA/JPL/University of Arizona

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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.