A Crater with a Surrounding Bench
NASA/JPL-Caltech/UArizona
A Crater with a Surrounding Bench
ESP_023593_1845  Science Theme: Sedimentary/Layering Processes
This observation shows a crater with a surrounding bench. The crater's original rim appears to have been eroded, but mainly above a resistant layer. It's this sort of layering that gives the crater such a distinctive, "double-ring" appearance.

The image shows fine layering in both the bench and the inner crater walls. The interior of the crater--itself ringed by darker material--appears relatively featureless except for the ripples caused by wind.

This caption is based on the original science rationale.



Written by: HiRISE Science Team (audio by Tre Gibbs)  (4 October 2011)

This is a stereo pair with ESP_023382_1845.
 
Acquisition date
08 August 2011

Local Mars time
14:12

Latitude (centered)
4.375°

Longitude (East)
356.588°

Spacecraft altitude
272.4 km (169.3 miles)

Original image scale range
28.2 cm/pixel (with 1 x 1 binning) so objects ~85 cm across are resolved

Map projected scale
25 cm/pixel and North is up

Map projection
Equirectangular

Emission angle
15.9°

Phase angle
20.1°

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

Solar longitude
341.6°, Northern Winter

For non-map projected images
North azimuth:  96°
Sub-solar azimuth:  344.7°
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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.