Lobate Flow Features East of Hellas Region
NASA/JPL/UArizona
Lobate Flow Features East of Hellas Region
ESP_029035_1455  Science Theme: Mass Wasting Processes
Lobate (or tongue-shaped) flow features such as those seen emanating from the hill at the north end of this image are common in this region east of the Hellas Basin.

These features are considered to be a depositional sink for water ice-rich deposits falling from the atmosphere during periods of high obliquity in the past several million years.

Most of the ice is likely sublimated away, but moraine-like ridges at the flows' borders are still apparent. The surfaces of these features also have polygonal textures, another signal for the presence of ice just beneath the surface.



Written by: Dan Berman  (17 October 2012)

This is a stereo pair with ESP_029457_1455.
 
Acquisition date
05 October 2012

Local Mars time
15:48

Latitude (centered)
-34.316°

Longitude (East)
113.903°

Spacecraft altitude
252.5 km (156.9 miles)

Original image scale range
51.0 cm/pixel (with 2 x 2 binning) so objects ~153 cm across are resolved

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50 cm/pixel and North is up

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Equirectangular

Emission angle
8.2°

Phase angle
55.2°

Solar incidence angle
62°, with the Sun about 28° above the horizon

Solar longitude
183.5°, Northern Autumn

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North azimuth:  98°
Sub-solar azimuth:  25.3°
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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.