PIA26321: Mars Mysteries: Unveiling the Icy Craters
 Target Name:  Mars
 Is a satellite of:  Sol (our sun)
 Mission:  Mars Reconnaissance Orbiter (MRO)
 Spacecraft:  Mars Reconnaissance Orbiter (MRO)
 Instrument:  HiRISE
 Product Size:  2880 x 1800 pixels (w x h)
 Produced By:  University of Arizona/HiRISE-LPL
 Other  
Information: 
Other products from ESP_025840_2240
 Full-Res TIFF:  PIA26321.tif (12.88 MB)
 Full-Res JPEG:  PIA26321.jpg (730.7 kB)

Click on the image above to download a moderately sized image in JPEG format (possibly reduced in size from original)

Original Caption Released with Image:

Click here for larger image of PIA26321
Map Projected Browse Image
Click on image for larger version

Over the past two decades, HiRISE and the Context Camera on MRO have catalogued hundreds of new impact craters. Some of these recent craters, particularly in the mid- to high-latitudes, have excavated buried water-ice that typically is exposed within the crater cavity.

In some cases, these patchy icy deposits and meter-sized blocks of ice are thrown out of the crater and form part of the ejecta. This image shows one such example of a 13-meter (43 feet) diameter crater in Arcadia Planitia where ice was exposed both in the crater interior and ejecta.

The crater is accompanied by a dark blast zone, extending almost 850 meters (half a mile) from the center. Subsequent observations permit monitoring of the gradual sublimation of these ice exposures at high resolution. This provides details about sublimation rates at a given location over time and gives us important insights for understanding near-surface ice-stability and the present-day climate on Mars.

The ice exposed by such craters also helps scientists get an idea of the purity, amount, and the depth of buried ice that relates to the conditions when the ice was initially deposited.

The map is projected here at a scale of 25 centimeters (9.8 inches) per pixel. (The original image scale is 30.4 centimeters [12.0 inches] per pixel [with 1 x 1 binning]; objects on the order of 91 centimeters [35.8 inches] across are resolved.) North is up.

The University of Arizona, in Tucson, operates HiRISE, which was built by Ball Aerospace & Technologies Corp., in Boulder, Colorado. NASA's Jet Propulsion Laboratory, a division of Caltech in Pasadena, California, manages the Mars Reconnaissance Orbiter Project for NASA's Science Mission Directorate, Washington.

Image Credit:
NASA/JPL-Caltech/University of Arizona

Image Addition Date:
2024-03-26