After a short drive the preceding day to get within arm's reach of the football-size rock, Curiosity put its Alpha Particle X-Ray Spectrometer (APXS) instrument in contact with the rock during the rover's 46th Martian day, or sol. The APXS is on a turret at the end of the rover's 7-foot (2.1-meter) arm. The Mars Hand Lens Imager (MAHLI), on the same turret, was used for close-up inspection of the rock. Both instruments were also used on Jake Matijevic on Sol 47 (Sept. 23).
The Chemistry and Camera (ChemCam) instrument, which shoots laser pulses at a target from the top of Curiosity's mast, also assessed what chemical elements are in the rock Jake Matijevic. Using both APXS and ChemCam on this rock provides a cross calibration of the two instruments.
With a final ChemCam laser testing of the rock on Sol 48 (Sept. 24), Curiosity finished its work on Jake Matijevic. The rover departed the same sol, with a drive of about 138 feet (42 meters), its longest yet. Sol 48, in Mars local mean solar time at Gale Crater, ended at 3:09 p.m. Sept. 24, PDT.
Curiosity landed on Mars seven weeks ago to begin a two-year mission using 10 instruments to assess whether a carefully chosen study area inside Gale Crater has ever offered environmental conditions favorable for microbial life.
More information about Curiosity is online at http://www.nasa.gov/msl and http://mars.jpl.nasa.gov/msl/ . You can follow the mission on Facebook at: http://www.facebook.com/marscuriosity and on Twitter at: http://www.twitter.com/marscuriosity .
Guy Webster / D.C. Agle 818-354-5011
Jet Propulsion Laboratory, Pasadena, Calif.
Guy.Webster@jpl.nasa.gov / Agle@jpl.nasa.gov