PIA04129: Nilosyrtis Dunes
NASA's Mars Global Surveyor shows a rare patch of dark sand dunes in the Nilosyrtis Mensae region of Mars.
 Target Name:  Mars
 Is a satellite of:  Sol (our sun)
 Mission:  Mars Global Surveyor (MGS) 
 Spacecraft:  Mars Global Surveyor Orbiter
 Instrument:  Mars Orbiter Camera (MOC) 
 Product Size:  836 x 2248 pixels (w x h) 
 Produced By:  Malin Space Science Systems 
 Producer ID:  MOC2-1169  
 Full-Res TIFF:  PIA04129.tif (1.882 MB)
 Full-Res JPEG:  PIA04129.jpg (209.7 kB)  

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Original Caption Released with Image:

31 July 2005
This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows a rare patch of dark sand dunes in the Nilosyrtis Mensae region of Mars. The steepest slopes on these dunes, their slipfaces, point toward the south-southwest, indicating that the dominant winds that formed them came from the north-northeast (top/upper right).

Location near: 34.5°N, 295.1°W
Image width: width: ~3 km (~1.9 mi)
Illumination from: lower left
Season: Northern Autumn

Image Credit:
NASA/JPL/Malin Space Science Systems

Image Addition Date:
2005-07-31