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Ganymede Grooved Terrain as Seen by Juno's JIRAM

Oct. 30, 2023

Processed data from the Jovian InfraRed Auroral Mapper (JIRAM) spectrometer aboard NASA's Juno mission is superimposed on a mosaic of optical images from the agency's Galileo and Voyager spacecraft that shows grooved terrain on Jupiter's moon Ganymede.

This composite image covers a portion of Phrygia Suclus, northeast of Nanshe Catena, on Ganymede. The data was taken by Juno during its June 7, 2021, flyby of the icy moon.

The JIRAM data is represented by the colored line running from the upper left to lower right in the graphic. The line depicts an increase in intensity of the spectral signature of a non-ice compound, possibly ammonium chloride, in the groove at the lower right of the image.

JIRAM "sees" infrared light not visible to the human eye. It measures heat radiated from the planet at an infrared wavelengths.

NASA's Jet Propulsion Laboratory, a division of Caltech in Pasadena, California, manages the Juno mission for the principal investigator, Scott Bolton, of the Southwest Research Institute in San Antonio. Juno is part of NASA's New Frontiers Program, which is managed at NASA's Marshall Space Flight Center in Huntsville, Alabama, for the agency's Science Mission Directorate in Washington. The Italian Space Agency (ASI) funded the Jovian InfraRed Auroral Mapper. Lockheed Martin Space in Denver built and operates the spacecraft.

More information about Juno is at http://www.nasa.gov/juno and http://missionjuno.swri.edu.

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Mission
Target
  • Ganymede
Spacecraft
  • Juno
Instrument
  • JIRAM
Credit
NASA/JPL-Caltech/SwRI/ASI/INAF/JIRAM/Brown University

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