Central Peak Gullies of Lohse Crater
NASA/JPL-Caltech/UArizona
Central Peak Gullies of Lohse Crater
ESP_012926_1365  Science Theme: Fluvial Processes
This image is of the eastern half of the central peak of Lohse Crater located in the Southern Hemisphere.

The crater itself is highly degraded and is roughly 129 kilometers (80 miles) in diameter. Of specific interest are the pristine looking gullies that appear to have sourced from layers below the top of this uplifted region.

Smaller gullies appear to emanate in all directions from the uplifted region, but of special interest is the larger gully located on the northern most slope of the central peak. This gully has a larger alcove and a better developed debris apron than surrounding gullies. This implies that either this gully formed over a longer time period or that more fluid was involved in its formation.

Gullies are present on many slopes on Mars, especially between the latitudes of 30 and 70 degrees in both hemispheres. Gullies are formed by fluids and have three distinct parts to them: an eroded “alcove” at the top, a sometimes sinuous “channel” section, and finally a large “debris apron” where the material eroded by the gully is deposited.

Written by: Shawn D. Hart  (3 June 2009)

This is a stereo pair with ESP_013071_1365.
 
Acquisition date
29 April 2009

Local Mars time
15:16

Latitude (centered)
-43.337°

Longitude (East)
343.090°

Spacecraft altitude
254.4 km (158.1 miles)

Original image scale range
51.4 cm/pixel (with 2 x 2 binning) so objects ~154 cm across are resolved

Map projected scale
50 cm/pixel and North is up

Map projection
Equirectangular

Emission angle
9.3°

Phase angle
53.3°

Solar incidence angle
44°, with the Sun about 46° above the horizon

Solar longitude
256.3°, Northern Autumn

For non-map projected images
North azimuth:  96°
Sub-solar azimuth:  14.3°
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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:
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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.