HiRISE | Once in a Blue Dune (ESP_053894

NASA/JPL-Caltech/UArizona

Once in a Blue Dune
ESP_053894_2295 Science Theme: Seasonal Processes

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HIFLYER
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Sand dunes often accumulate in the floors of craters. In this region of Lyot Crater there is a field of classic barchan dunes.

Just to the south of the group of barchan dunes is one large dune with a more complex structure. This particular dune, appearing like turquoise blue in enhanced color*, is made of finer material and/or has a different composition than the surroundings.

*NB: “Enhanced color” is also the same as false color, which we use to show details we cannot see in black and white. The dune is not actually blue and it would not look that way to our eyes if we were there. See “About color products”

Written by: Candy Hansen (11 June 2018)

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   (1032MB)

IRB color
map-projected   (590MB)

JP2 EXTRAS
Black and white
map-projected (511MB)
non-map           (335MB)

IRB color
map projected (167MB)
non-map           (268MB)

Merged IRB
map projected (278MB)

Merged RGB
map-projected (265MB)

RGB color
non map           (279MB)

ANAGLYPHS
Map-projected, reduced-resolution
Full resolution JP2 download
Anaglyph details page

DIGITAL TERRAIN MODEL (DTM)
DTM details page

BONUS
4K (TIFF)
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10K (TIFF)

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-Caltech/UArizona

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.