A Small, Double-Ringed Crater
NASA/JPL/University of Arizona
A Small, Double-Ringed Crater
ESP_028162_2310  Science Theme: Impact Processes
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This small, 230-meter crater formed by the impact of an asteroid onto a lobate flow deposit on Mars.

These deposits are surmised to have formed by the flow of glacial material on the surface of the planet. Ground-penetrating radar data from SHARAD, the radar sounder aboard MRO, show that a large abundance of ice is under the surface.

The impact penetrated through the material and into the substrate and formed this "double crater" as it excavated material from these two layers of different strengths.

Written by: Eldar Noe (audio by Tre Gibbs)   (19 September 2012)

This is a stereo pair with ESP_028083_2310.

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Acquisition date
29 July 2012

Local Mars time:
15:18

Latitude (centered)
50.889°

Longitude (East)
175.058°

Range to target site
307.0 km (191.9 miles)

Original image scale range
30.7 cm/pixel (with 1 x 1 binning) so objects ~92 cm across are resolved

Map projected scale
25 cm/pixel and North is up

Map projection
Equirectangular

Emission angle:
2.4°

Phase angle:
52.5°

Solar incidence angle
55°, with the Sun about 35° above the horizon

Solar longitude
147.0°, Northern Summer

North azimuth:
97°

Sub-solar azimuth:
340.2°
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ADDITIONAL INFORMATION
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Black & white is 5 km across; enhanced color about 1 km
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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
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.