Astronomy Picture of the Day
May 16, 2014

Unnamed Northern Impact Crater with Dunefield and Residual Water-Ice Frost
Unnamed Northern Impact Crater with Dunefield and Residual Water-Ice Frost

Credits: NASA/JPL/Arizona State University (ASU) - Credits for the additional process. and color.: Dr Paolo C. Fienga/Lunar Explorer Italia/IPF

In this VIS image, taken by the NASA - Mars Odyssey Orbiter on March, 5th, 2014, and during its 54.218th orbit around the Red Planet, we can see, once again, a so-called "Sand Sheet" with Dark Surface Duneforms (actually, it is a small and, most likely, Migrating Dunefield) that partly surrounds the (extremely small) Central Peak of an Unnamed Impact Crater located at a very high Latitude, in the proximities of the North Pole of Mars.

If you look at the picture very cerefully, wou will be able to see traces of Residual Water-Ice Frost both on the Northern Upper Side of the Crater's Rim and - but in this case these traces are just barely visible - on its Southern Inner Slopes, as well as on the top part of the Southern Upper Side of its Rim

Latitude (centered): 71,9875° North
Longitude (centered): 344,5200° East
Instrument: VIS

This image (which is a crop taken from an Original Mars Odyssey Orbiter b/w and Map-Projected frame published on the NASA - Planetary Photojournal with the ID n. PIA 18250) has been additionally processed, magnified to aid the visibility of the details, contrast enhanced, Gamma corrected and then colorized in Absolute Natural Colors (such as the colors that a human eye would actually perceive if someone were onboard the NASA - Mars Odyssey Orbiter and then looked down, towards the Surface of Mars), by using an original technique created - and, in time, dramatically improved - by the Lunar Explorer Italia Team.

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