PUBLIC INFORMATION OFFICE
JET PROPULSION LABORATORY
CALIFORNIA INSTITUTE OF TECHNOLOGY
NATIONAL AERONAUTICS AND SPACE ADMINISTRATION 
PASADENA, CALIF. 91109. TELEPHONE (818) 354-5011
http://www.jpl.nasa.gov

PHOTO CAPTION                     MRPS #81958           
                                  July 22, 1997  (Sol 19)
                                  Sojourner & Yogi 

A close up of Sojourner as it placed its Alpha Proton X-Ray 
Spectrometer (APXS) upon the surface of the rock Yogi was taken 
by the Imager for Mars Pathfinder (IMP) over sols 8, 9 and 10.  
Distortion in the background is due to parallax.  Early results 
of Yogi show it to be low in quartz content, and more primitive 
than the rock Barnacle Bill, and appeared more like the common 
basalts found on Earth.  

Mars Pathfinder is the second in NASA's Discovery program of low-
cost spacecraft with highly focused science goals. The Jet 
Propulsion Laboratory, Pasadena, CA, developed and manages the 
Mars Pathfinder mission for NASA's Office of Space Science, 
Washington, D.C. JPL is an operating division of the California 
Institute of Technology (Caltech).  The Imager for Mars 
Pathfinder (IMP) was developed by the University of Arizona Lunar 
and Planetary Laboratory under contract to JPL. Peter Smith is 
the Principal Investigator.

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