Is That an Impact Crater?
NASA/JPL/University of Arizona
Is That an Impact Crater?
ESP_049075_0995  Science Theme: Polar Geology


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This image was acquired to take a closer look at a circular feature that might be an impact structure on the South Polar layered deposits.

Measuring the sizes and frequency of impact craters provides a constraint on the age of the landscape. However, craters in icy terrain are modified by processes that flatten and change them in such a manner that it is hard to say for sure if it had an impact origin.

Written by: Alfred McEwen (audio: Tre Gibbs)  (3 April 2017)
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Acquisition date
14 January 2017

Local Mars time:
15:24

Latitude (centered)
-80.546°

Longitude (East)
223.805°

Range to target site
249.1 km (155.7 miles)

Original image scale range
49.8 cm/pixel (with 2 x 2 binning) so objects ~150 cm across are resolved

Map projected scale
50 cm/pixel

Map projection
Polarstereographic

Emission angle:
5.3°

Phase angle:
59.5°

Solar incidence angle
62°, with the Sun about 28° above the horizon

Solar longitude
299.0°, Northern Winter

For non-map projected images
North azimuth:  109°
Sub-solar azimuth:  54.5°
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RGB: red-green-blue
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Black & white is 5 km across; enhanced color about 1 km
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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
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.