Status Report

NASA Mars Odyssey THEMIS Image: Complex Crater

By SpaceRef Editor
July 19, 2005
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Medium image for 20050719a

Image Context:

Context image for 20050719a
Context image credit: NASA/Mars Orbiter Laser Altimeter (MOLA) Team
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ParameterValue ParameterValue
Latitude36.6 &nbsp InstrumentVIS
Longitude329.5E (30.5W) &nbsp Resolution (m)38
Image Size (pixels)1684×739 &nbsp Image Size (km)64.3×28.2

The crater in today’s image is larger and more complex

than the craters in yesterday’s image. In large craters, the

simple bowl shape is modified during crater formation. Flat

floors, central peaks, and in this case, central pits are formed

by rebound and heating of the impacted surface. Crater rims

collapse due to gravity forming step-like slump blocks on the

interior side of the rim. This crater also appears to be

shedding material from the rims onto the crater floor in the

form of fans and landslides. Finally, the presence of dunes

in the lower left part of the crater indicates that wind activity

has played a part in modifying this crater interior.

[Source: ASU THEMIS Science Team]

Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.

NASA’s Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA’s Office of Space Science, Washington, D.C. The Thermal Emission Imaging System (THEMIS) was developed by Arizona State University, Tempe, in collaboration with Raytheon Santa Barbara Remote Sensing. The THEMIS investigation is led by Dr. Philip Christensen at Arizona State University. Lockheed Martin Astronautics, Denver, is the prime contractor for the Odyssey project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL, a division of the California Institute of Technology in Pasadena.

Image Credit: NASA/JPL/Arizona State University

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