Dune Gullies in Matara Crater
NASA/JPL/University of Arizona
Dune Gullies in Matara Crater
ESP_020058_1300  Science Theme: Aeolian Processes
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This image, and the associated subimage, show changing dunes and incised gullies in the southern Matara Crater.

Repeat imaging of the dunes in this crater shows that material towards the top of the gullies has moved downslope (towards the left in subimage), and the channel beds may have widened over time. Because this activity occurs during Martian Southern hemisphere winter, it is believed to be related to carbon dioxide frost that forms as the area grows colder. Scientists continue to monitor this region for changes in the gullies and the dunes themselves.

The subimage is approximately one kilometer (0.6 miles) across. Previous HiRISE images of this region include PSP_007650_1300, ESP_013834_1300, ESP_019069_1300, and ESP_019847_1300.

Written by: Kristin Block   (9 February 2011)

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Acquisition date
06 November 2010

Local Mars time:
15:55

Latitude (centered)
-49.463°

Longitude (East)
34.721°

Range to target site
254.6 km (159.2 miles)

Original image scale range
25.5 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:
8.7°

Phase angle:
64.6°

Solar incidence angle
72°, with the Sun about 18° above the horizon

Solar longitude
176.5°, Northern Summer

North azimuth:
98°

Sub-solar azimuth:
31.7°
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IRB: infrared-red-blue
RGB: red-green-blue
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Black & white is 5 km across; enhanced color about 1 km
For scale, use JPEG/JP2 black & white map-projected images

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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:
NASA/JPL/University of Arizona



Postscript
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.