Dust and Frost
NASA/JPL/University of Arizona
Dust and Frost
ESP_053129_2650  Science Theme: Seasonal Processes
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Sand dunes in the north polar regions of Mars show light coatings of pale orange dust blown partially across the dark basaltic sand. Around the edges of the dunes, patches of seasonal dry ice remain.

These patches will be gone soon as they sublimate (turn from ice to gas) in the summer sun. Some blocks of ice are visible at the foot of an alcove formed by a sand avalanche down the slipface of the dune.

Written by: Candy Hansen  (11 June 2018)
 
Acquisition date
26 November 2017

Local Mars time:
13:03

Latitude (centered)
84.695°

Longitude (East)
0.712°

Spacecraft altitude
320.0 km (200.0 miles)

Original image scale range
32.0 cm/pixel (with 1 x 1 binning) so objects ~96 cm across are resolved

Map projected scale
25 cm/pixel

Map projection
Polarstereographic

Emission angle:
0.9°

Phase angle:
60.5°

Solar incidence angle
60°, with the Sun about 30° above the horizon

Solar longitude
92.8°, Northern Summer

For non-map projected images
North azimuth:  122°
Sub-solar azimuth:  317.4°
JPEG
Black and white
map projected  non-map

IRB color
map projected  non-map

Merged IRB
map projected

Merged RGB
map projected

RGB color
non-map projected

JP2
Black and white
map-projected   (725MB)

IRB color
map-projected   (398MB)

JP2 EXTRAS
Black and white
map-projected  (451MB)
non-map           (336MB)

IRB color
map projected  (221MB)
non-map           (283MB)

Merged IRB
map projected  (197MB)

Merged RGB
map-projected  (187MB)

RGB color
non map           (272MB)
ADDITIONAL INFORMATION
B&W label
Color label
Merged IRB label
Merged RGB label
EDR products
HiView

NB
IRB: infrared-red-blue
RGB: red-green-blue
About color products (PDF)

Black & white is 5 km across; enhanced color about 1 km
For scale, use JPEG/JP2 black & white map-projected images

USAGE POLICY
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/University of Arizona

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.