HiRISE | Sunken and Pitted Ejecta (ESP_036182

NASA/JPL-Caltech/UArizona

Sunken and Pitted Ejecta
ESP_036182_2230 Science Theme: Impact Processes

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The objective of this observation was to examine the edge of impact ejecta from a crater to the north-west of this area (north is up, west is to the left). The ejecta visible in the top left of this image seems to be lower than the surrounding surface.

This is unusual because impact ejecta is laid down on top of existing ground. The ejecta also seems to have pits. Perhaps the hot ejecta fell on frozen ground and melted the underlying ice?

Written by: Veronica Bray (narration: Tre Gibbs) (30 April 2014)

Acquisition date
15 April 2014

Local Mars time
15:14

Latitude (centered)
42.521°

Longitude (East)
96.406°

Spacecraft altitude
299.1 km (185.9 miles)

Original image scale range
30.1 cm/pixel (with 1 x 1 binning) so objects ~90 cm across are resolved

Map projected scale
25 cm/pixel and North is up

Map projection
Equirectangular

Emission angle
7.1°

Phase angle
52.1°

Solar incidence angle
45°, with the Sun about 45° above the horizon

Solar longitude
116.9°, Northern Summer

For non-map projected images
North azimuth: 97°
Sub-solar azimuth: 355.7°

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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-Caltech/UArizona

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.