Rim of Elongated Crater
NASA/JPL/UArizona
Rim of Elongated Crater
PSP_009665_1525  Science Theme: Impact Processes
This scene captures about half of a crater with an elongated rim. When craters form, they typically have a circular shape. This crater has been modified since it formed, possibly by tectonic processes or excavation, although its raised rim indicates that these processes have not heavily eroded the rim since formation.

The terrain surrounding the crater consists of megaripples, degraded craters, and rough terrain, possibly due to ancient lava flows from the nearby Hadriaca Patera.

Determining the age of these features and the processes that formed them may be possible; one such process is the interaction between the ripples and bedrock. The transverse aeolian ripples (TARs)with a N-S wind direction appear to be lithified because the rugged bedrock, impact craters, and ejecta overlay the ripples, indicating that the ripples are older. In the larger craters, brighter (possibly newer) ripples suggest a dominant wind direction from the northwest.



Written by: Kelly Kolb/Circe Verba  (29 October 2008)
 
Acquisition date
18 August 2008

Local Mars time
15:35

Latitude (centered)
-27.069°

Longitude (East)
91.538°

Spacecraft altitude
255.0 km (158.5 miles)

Original image scale range
51.0 cm/pixel (with 2 x 2 binning) so objects ~153 cm across are resolved

Map projected scale
50 cm/pixel and North is up

Map projection
Equirectangular

Emission angle
0.3°

Phase angle
72.2°

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

Solar longitude
114.5°, Northern Summer

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  44.7°
JPEG
Black and white
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IRB color
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Merged IRB
map projected

Merged RGB
map projected

RGB color
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JP2
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map-projected   (214MB)

IRB color
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JP2 EXTRAS
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map-projected  (89MB)
non-map           (137MB)

IRB color
map projected  (33MB)
non-map           (111MB)

Merged IRB
map projected  (202MB)

Merged RGB
map-projected  (201MB)

RGB color
non map           (102MB)
ADDITIONAL INFORMATION
B&W label
Color label
Merged IRB label
Merged RGB label
EDR products
HiView

NB
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

USAGE POLICY
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
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.