Patches of Snow
NASA/JPL/University of Arizona
Patches of Snow
ESP_053324_2570  Science Theme: Seasonal Processes
twitter  •  tumblr

HICLIP
1080p (MP4)
Audio (MP3)

WALLPAPER
800
1024
1152
1280
1440
1600
1920
2048
2560
2736
2880
4500
4K
8K
10K

HIFLYER
PDF (11 x 17)

HISLIDES
PowerPoint
Keynote
PDF

The North Pole of Mars is surrounded by a vast sea of sand dunes. In this dune field, the dunes are covered by a seasonal cap of dry ice in the winter.

In early Martian summer, at the time we acquired this image, the dunes are almost free of their seasonal ice cover. Only pockets of ice protected in the shade most of the day remain.

Written by: Candy Hansen (audio: Tre Gibbs)  (29 May 2018)

This is a stereo pair with ESP_053377_2570.
 
Acquisition date
11 December 2017

Local Mars time
13:54

Latitude (centered)
76.623°

Longitude (East)
89.543°

Spacecraft altitude
317.0 km (197.0 miles)

Original image scale range
33.3 cm/pixel (with 1 x 1 binning) so objects ~100 cm across are resolved

Map projected scale
25 cm/pixel

Map projection
Polarstereographic

Emission angle
18.6°

Phase angle
69.1°

Solar incidence angle
54°, with the Sun about 36° above the horizon

Solar longitude
99.5°, Northern Summer

For non-map projected images
North azimuth:  109°
Sub-solar azimuth:  320.2°
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   (702MB)

IRB color
map-projected   (413MB)

JP2 EXTRAS
Black and white
map-projected  (397MB)
non-map           (268MB)

IRB color
map projected  (168MB)
non-map           (231MB)

Merged IRB
map projected  (178MB)

Merged RGB
map-projected  (171MB)

RGB color
non map           (232MB)
ANAGLYPHS
Map-projected, reduced-resolution
Full resolution JP2 download
Anaglyph details page

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.