[meteorite-list] Mars Odyssey THEMIS Image of the Rim of Henry Crater (April 2, 2002)

From: Ron Baalke <baalke_at_meteoritecentral.com>
Date: Thu Apr 22 09:50:22 2004
Message-ID: <200204021803.KAA10055_at_zagami.jpl.nasa.gov>

http://themis.asu.edu/zoom-20020402a.html

Mars 2001 Odyssey
Thermal Emission Imaging System (THEMIS)
Rim of Henry Crater (Released 02 April 2002)


This portion of the rim of Henry Crater has numerous dark streaks
located on the slopes of the inner crater wall. These dark slope
streaks have been suggested to have formed when the relatively
bright dust that mantles the slopes slides downhill, either
exposing a dust-free darker surface or creating a darker surface
by increasing its roughness. The topography in this region appears
muted, indicating the presence of regional dust mantling. The
materials on floor of the crater (middle to lower left) are layered,
with differing degrees of hardness and resistance to erosion producing
cliffs (resistant layers) and ledges (easily eroded layers). These
layered materials may have been originally deposited in water, although
deposition by other means, such as windblown dust and sand, is also
possible. Henry Crater, named after a 19th Century French astronomer,
is 170 km in diameter and is located at 10.9° N, 336.7°
W in a region called Arabia Terra.
----------------------------------------------------------------------------

Note: This 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
Received on Tue 02 Apr 2002 01:03:38 PM PST