PIA07000: VIMS Iapetus Two Shooter

VIMS Iapetus Two Shooter


These two color composite images of Saturn's moon Iapetus from Cassini's visual and infrared mapping spectrometer were obtained on Dec. 31, 2004, an hour and a half before the New Year, at a distance of 121,000 kilometers (75,186 miles), with a spatial resolution of about 60 kilometers (37 miles).

The three colors used in the left mosaic correspond to 1.01, 1.51, and 2 microns, while the right mosaic is comprised of images at 3.0, 3.21, and 4.60 microns. The two images show the vast difference in the composition of the bright and dark regions of Iapetus. As one moves from the near infrared 1 to 2 micron spectral region (left image) to the 3 to 5 micron spectral region (right image) the bright, ice-rich region on Iapetus turns dark and the dark region rich in organics turns bright.

Background Info:

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 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 visible and infrared mapping spectrometer team is based at the University of Arizona, Tucson.

For more information about the Cassini-Huygens mission visit, http://saturn.jpl.nasa.gov . For more information about the visual and infrared mapping spectrometer visit http://wwwvims.lpl.arizona.edu/ .

Cataloging Keywords:

Name Value Additional Values
Target Iapetus
System Saturn
Target Type Satellite
Mission Cassini-Huygens
Instrument Host Cassini Orbiter
Host Type Orbiter
Instrument Visual and Infrared Mapping Spectrometer (VIMS)
Extra Keywords Color, Infrared, Visual
Acquisition Date
Release Date 2005-01-10
Date in Caption 2004-12-31
Image Credit NASA/JPL/University of Arizona
Source photojournal.jpl.nasa.gov/catalog/PIA07000
Identifier PIA07000