Dune Gullies in Matara Crater
Dune Gullies in Matara Crater
ESP_020058_1300  Science Theme: Aeolian Processes
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  (4 January 2011)
Acquisition date
06 November 2010

Local Mars time

Latitude (centered)

Longitude (East)

Spacecraft altitude
250.5 km (155.7 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

Emission angle

Phase angle

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

Solar longitude
176.5°, Northern Summer

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  32.7°
Black and white
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IRB color
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Merged IRB
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Merged RGB
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RGB color
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Black and white
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IRB color
map-projected   (478MB)

Black and white
map-projected  (493MB)
non-map           (550MB)

IRB color
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non-map           (483MB)

Merged IRB
map projected  (210MB)

Merged RGB
map-projected  (187MB)

RGB color
non map           (430MB)
B&W label
Color label
Merged IRB label
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EDR products

IRB: infrared-red-blue
RGB: red-green-blue
About color products (PDF)

Black & white is 5 km across; enhanced color about 1 km
For scale, use JPEG/JP2 black & white map-projected images

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’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. The HiRISE camera was built by Ball Aerospace and Technology Corporation and is operated by the University of Arizona.