PIA05466: Heading for Humphrey
 Target Name:  Mars
 Is a satellite of:  Sol (our sun)
 Mission:  Mars Exploration Rover (MER)
 Spacecraft:  Spirit
 Instrument:  Navigation Camera
 Product Size:  600 x 600 pixels (w x h)
 Produced By:  JPL
 Full-Res TIFF:  PIA05466.tif (358 kB)
 Full-Res JPEG:  PIA05466.jpg (50.53 kB)

Click on the image above to download a moderately sized image in JPEG format (possibly reduced in size from original)

Original Caption Released with Image:

This image of the rock called "Humphrey" was taken by the navigational camera on the Mars Exploration Rover Spirit during its 54th sol on Mars. The rock's name was inspired by Humphries Peak - the tallest peak in Arizona and part of the San Francisco volcanic complex. Standing approximately .6 meters (about 2 feet) tall, "Humphrey" is one of the largest blocks of what scientists believe is ejected material from one of the rover's long-term targets, the crater dubbed "Bonneville." Likely a basaltic rock, the fractures in "Humphrey" are thought to have been caused by the impact as it was hurled from the crater to its current resting place. Scientists are eager to investigate ejecta rocks, as they give a glimpse of the composition of materials that lie beneath the martian surface. Spirit's engineering and science teams are preparing to brush and then grind "Humphrey" with Spirit's rock abrasion tool. The hope is to remove as much dust as possible so they can examine the coating before grinding, and then study the exposed undersurface after grinding with the cameras and the miniature thermal emission spectrometer.

Image Credit:

Image Addition Date: