HiRISE | Small Impacts at Slope Streak Apexes (PSP_003259

NASA/JPL/University of Arizona

Small Impacts at Slope Streak Apexes
PSP_003259_1850 Science Theme: Fluvial Processes

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This image shows some dark slope streaks where small impact craters are visible at their apexes. These craters have little splashes of dark ejecta, which indicate that they were throwing up the same dark-toned material that the slope streak has revealed.

These dark slope streaks and the medium-toned one to the left show longitudinal ridges that are indicators of the flow of material during the slope streak event. Older, almost completely faded slope streaks can be seen to source off of the crater in the upper right corner of this portion of the image.Written by: Ross A. Beyer (30 October 2007)

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Acquisition date:	07 April 2007	Local Mars time:	3:36 PM
Latitude (centered):	5.0 degrees	Longitude (East):	32.7 degrees
Range to target site:	271.3 km (169.6 miles)	Original image scale range:	54.3 cm/pixel (with 2 x 2 binning) so objects ~163 cm across are resolved
Map projected scale:	50 cm/pixel and North is up	Map projection:	EQUIRECTANGULAR
Emission angle:	0.7 degrees	Phase angle:	57.6 degrees
Solar incidence angle:	57 degrees, with the Sun about 33 degrees above the horizon	Solar longitude:	214.6 degrees, Northern Autumn
For non-map projected products:
North azimuth:	97 degrees	Sub-solar azimuth:	345.8 degrees
For map-projected products
North azimuth:	270 degrees	Sub solar azimuth:	159.7 degrees

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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: Image: 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.