A Martian Game Board
A Martian Game Board
ESP_060791_2550  Science Theme: Seasonal Processes
It’s spring in the Northern Hemisphere of Mars, and the polar region is still blanketed by seasonal carbon dioxide frost (dry ice). This image shows an area near the sand sea (called an “erg”) that is surrounding the water ice-rich layered deposits.

The many bumps are sand dunes less than 100 meters across that are mostly covered by seasonal frost, appearing in a manner that looks artificial but is a natural consequence of the wind patterns in this region. The smaller, darker spots are places where the seasonal frost has sublimed away, exposing the dark surface below. The combination of these features makes for an unearthly scene!

Written by: Ken Herkenhoff (audio: Tre Gibbs)  (14 October 2019)
Acquisition date
16 July 2019

Local Mars time

Latitude (centered)

Longitude (East)

Spacecraft altitude
317.4 km (197.2 miles)

Original image scale range
31.8 cm/pixel (with 1 x 1 binning) so objects ~95 cm across are resolved

Map projected scale
25 cm/pixel

Map projection

Emission angle

Phase angle

Solar incidence angle
58°, with the Sun about 32° above the horizon

Solar longitude
53.3°, Northern Spring

For non-map projected images
North azimuth:  103°
Sub-solar azimuth:  317.5°
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

Black and white
map-projected   (657MB)

IRB color
map-projected   (385MB)

Black and white
map-projected  (384MB)
non-map           (281MB)

IRB color
map projected  (146MB)
non-map           (223MB)

Merged IRB
map projected  (181MB)

Merged RGB
map-projected  (168MB)

RGB color
non map           (206MB)
B&W label
Color label
Merged IRB label
Merged RGB label
EDR products

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

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

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.