Gullies and Lobate Material in a Crater in Nereidum Montes
Gullies and Lobate Material in a Crater in Nereidum Montes
ESP_023173_1405  Science Theme: Glacial/Periglacial Processes
This crater has gullies on its southwest-facing walls and rim, as well as and what appears to be two separate instances of lobate (ear-shaped) material associated to its interior gullies.

This observation is a “ride-along” with the CTX Camera, which has a much larger footprint, but lower resolution than the HiRISE camera.

With much better resolution than CTX, HiRISE may be able to provide insight into the relationship between the features.

This caption is based on the original science rationale.

Written by: HiRISE Science Team  (31 August 2011)

This is a stereo pair with ESP_022540_1405.
Acquisition date
07 July 2011

Local Mars time

Latitude (centered)

Longitude (East)

Spacecraft altitude
251.4 km (156.3 miles)

Original image scale range
26.1 cm/pixel (with 1 x 1 binning) so objects ~78 cm across are resolved

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25 cm/pixel and North is up

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Phase angle

Solar incidence angle
40°, with the Sun about 50° above the horizon

Solar longitude
323.8°, Northern Winter

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North azimuth:  98°
Sub-solar azimuth:  34.7°
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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.