A huge annular feature with an outer diameter of approximately 440
kilometers (273 miles) appears in this image taken with Cassini's Titan
radar mapper. It resembles a large crater or part of a ringed basin,
either of which could be formed when a comet or asteroid tens of
kilometers in size slammed into Titan. This is the first impact feature
identified in radar images of Titan.
The surface of Titan appears to be very young compared to other Saturnian
satellites. In Titan's case, debris raining down from the atmosphere or
other geologic processes may mask or remove the craters. The pattern of
brightness suggests that there is topography associated with this feature;
for example, in the center of the image there appear to be mounds each
about 25 kilometers (15 miles) across. Since they are dark on their lower
edges that face away from the radar and bright on the opposite face, they
must be elevated above the surrounding terrain.
This image is a part of a larger swath acquired on Feb. 15, 2005, on
Cassini's second opportunity to map Titan's surface via radar. Seams
between radar segments are visible as horizontal, sawtooth-shaped lines.
The Cassini-Huygens mission is a cooperative project of NASA, the
European Space Agency and the Italian Space Agency. The Jet Propulsion
Laboratory, a division of the California Institute of Technology in
Pasadena, manages the Cassini-Huygens mission for NASA's Science Mission
Directorate, Washington, D.C. The Cassini orbiter and its two onboard
cameras were designed, developed and assembled at JPL. The radar
instrument team is based at JPL, working with team members from the
United States and several European countries.
For more information about the Cassini-Huygens mission visit http://saturn.jpl.nasa.gov.
