A Mysterious Bright Streak on the South Polar Layered Deposits
NASA/JPL/University of Arizona
A Mysterious Bright Streak on the South Polar Layered Deposits
ESP_040667_0910  Science Theme: Polar Geology
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This locale was targeted to a bright, bow-shaped marking visible in a summertime image from MRO’s Context Camera. Our HiRISE image reveals a crater near the streak, perhaps from an impact event, although now too degraded to be certain of its origin.

This image also shows a lacy network of many fine channels associated with jets in the subliming carbon dioxide of the springtime. The bright streak might be due to topographic shading, although an anaglyph will help us determine that for certain. If it is topographic, then this portion of the layered deposits may have been folded under compressional stresses, perhaps from gravitational slumping.

Written by: Alfred McEwen (audio: Tre Gibbs)  (3 June 2015)

This is a stereo pair with ESP_032226_0910.
 
Acquisition date
31 March 2015

Local Mars time
18:15

Latitude (centered)
-88.999°

Longitude (East)
137.549°

Spacecraft altitude
246.0 km (152.9 miles)

Original image scale range
54.0 cm/pixel (with 2 x 2 binning) so objects ~162 cm across are resolved

Map projected scale
50 cm/pixel

Map projection
Polarstereographic

Emission angle
25.7°

Phase angle
88.7°

Solar incidence angle
73°, with the Sun about 17° above the horizon

Solar longitude
317.7°, Northern Winter

For non-map projected images
North azimuth:  147°
Sub-solar azimuth:  57.6°
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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.