PUBLIC INFORMATION OFFICE 
JET PROPULSION LABORATORY 
CALIFORNIA INSTITUTE OF TECHNOLOGY 
NATIONAL AERONAUTICS AND SPACE ADMINISTRATION 
PASADENA, CALIF. 91109. TELEPHONE (818) 354-5011

PHOTO CAPTION                                P-46506BC
                                             Tethys
                                             March 28, 1996

One of the most exciting features of Tethys (and of the whole 
Saturnian system as well) is Ithaca Chasma, a huge trench which 
extends from near the north pole down almost all the way to the 
south pole. It's average width is 100 kilometers (60 miles) and 
is 4-5 kilometers (2-3 miles) deep. This artist's rendering is 
drawn from the lip of the large chasm looking into it, with 
Saturn in the background. By Cassini is a joint mission of NASA, 
the European Space Agency and the Italian Space Agency. The 
mission is scheduled for launch in October 1997 and will reach 
Saturn in July 2004.   [Digital composition for NASA-JPL was 
created by Dave Seal of JPL.]

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