Colorful Equatorial Gullies in Krupac Crater
NASA/JPL/University of Arizona
Colorful Equatorial Gullies in Krupac Crater
ESP_049488_1720  Science Theme: Mass Wasting Processes


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Although large gullies (ravines) are concentrated at higher latitudes, there are gullies on steep slopes in equatorial regions. An enhanced-color closeup shows part of the rim and inner slope of Krupac Crater located just 7.8 degrees south of the equator.

The colors of the gully deposits match the colors of the eroded source materials. Krupac is a relatively young impact crater, but exposes ancient bedrock. Krupac Crater also hosts some of the most impressive recurring slope lineae (RSL) on equatorial Mars outside of Valles Marineris.

Another close look shows some of RSL, flowing downhill (to the left). The RSL leave bright deposits when inactive from previous years; this year’s active RSL are the thin dark lines.

Written by: Alfred McEwen (audio: Tre Gibbs)  (2 May 2017)
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Acquisition date
15 February 2017

Local Mars time:
14:06

Latitude (centered)
-7.792°

Longitude (East)
86.044°

Range to target site
262.4 km (164.0 miles)

Original image scale range
26.3 cm/pixel (with 1 x 1 binning) so objects ~79 cm across are resolved

Map projected scale
25 cm/pixel and North is up

Map projection
Equirectangular

Emission angle:
8.6°

Phase angle:
23.7°

Solar incidence angle
32°, with the Sun about 58° above the horizon

Solar longitude
317.9°, Northern Winter

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  347.4°
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non-map           (298MB)

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IRB: infrared-red-blue
RGB: red-green-blue
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Black & white is 5 km across; enhanced color about 1 km
For scale, use JPEG/JP2 black & white map-projected images

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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.