California Institue of Technology NASA Portal JPL Home Page JPL CalTech
skip navigational links
NASA Logo - Jet Propulsion Laboratory
Images News Missions Events Kids Education Science & Research About JPL
Mars Exploration Rover Image Release

Frost on Mars Rover Opportunity
Frost on Mars Rover Opportunity
Frost can form on surfaces if enough water is present and the temperature is sufficiently low. On each of NASA's Mars Exploration Rovers, the calibration target for the panoramic camera provides a good place to look for such events. A thin frost was observed by Opportunity's panoramic camera on the rover's 257th sol (Oct. 13, 2004) 11 minutes after sunrise (left image). The presence of the frost is most clearly seen on the post in the center of the target, particularly when compared with the unsegmented outer ring of the target, which is white. The post is normally black. For comparison, note the difference in appearance in the image on the right, taken about three hours later, after the frost had dissipated. Frost has not been observed at Spirit, where the amount of atmospheric water vapor is observed to be appreciably lower. Both images were taken through a filter centered at a wavelength of 440 nanometers (blue).

Release Date: 12/13/04
Image Credit: NASA/JPL/Cornell
Reference URL: http://photojournal.jpl.nasa.gov/catalog/PIA07108

+ Return to previous page

FIRST GOV