PIA00844: NIMS Callisto Global Mosaic
 Target Name:  Ganymede
 Is a satellite of:  Jupiter
 Mission:  Galileo
 Spacecraft:  Galileo Orbiter
 Instrument:  Near Infrared Mapping Spectrometer 
 Product Size:  1143 x 635 pixels (w x h)
 Produced By:  JPL
 Producer ID:  MRPS78716
 Addition Date:  1998-03-26
 Primary Data Set:  Galileo EDRs
 Full-Res TIFF:  PIA00844.tif (934.2 kB)
 Full-Res JPEG:  PIA00844.jpg (63.81 kB)

Click on the image above to download a moderately sized image in JPEG format (possibly reduced in size from original)

Original Caption Released with Image:

The Near Infrared Mapping Spectrometer (NIMS) acquired this global mosaic (right) at a spatial resolution of 100 km during Galileo's third orbit on November 4, 1996, roughly 7.5 hours prior to Callisto closest approach.

The lighter bluish area in the upper latitudes is the Asgard multi-ring structure (the second largest surface feature on Callisto) with crater Burr to the north and Tornasuk to the east. The bluish color indicates regions with more exposed water ice while the reddish/rusty color indicates surface areas rich in non-ice minerals.


  • Click on Asgard to view a sample spectrum of this region. This spectrum shows a higher abundance of ice between 1 and 2 microns.
  • Click on the dark terrain to view sample spectra of Callisto's surface which shows more "rocky" material and less ice.
  • Click here to compare the two spectra.

The Jet Propulsion Laboratory, Pasadena, CA manages the mission for NASA's Office of Space Science, Washington, DC.

This image and other images and data received from Galileo are posted on the World Wide Web, on the Galileo mission home page at URL http://www.jpl.nasa.gov/galileo/sepo.

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