PIA00835: NIMS Observation of Hotspots on Io

Target Name: Io Is a satellite of: Jupiter Mission: Galileo Spacecraft: Galileo Orbiter Instrument: Near Infrared Mapping Spectrometer Product Size: 1525 samples x 1100 lines Produced By: JPL Producer ID: MRPS76947 Addition Date: 1998-03-26 Primary Data Set: Galileo EDRs Full-Res TIFF: PIA00835.tif (178 kB) Full-Res JPEG: PIA00835.jpg (74.71 kB)

Original Caption Released with Image: Io has been imaged by the Near Infrared Mapping Spectrometer (NIMS) on Galileo. The image on the right shows for the first time the distribution of volcanic hotspots on the surface of Io, as seen by NIMS. Three of these hotspots are new discoveries, only detectable with the NIMS instrument. This image was taken during the G1 encounter on June 29 1996. The image on the left shows the same view of Io as seen by the Voyager spacecraft in 1979. At least one dozen hotspots have been identified from this NIMS image. Most of the hotspot locations can be matched with volcanic features on the surface of Io, including the vent area of the active Prometheus plume. 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://galileo.jpl.nasa.gov. Image Credit: NASA/JPL