PIA02543: Prometheus Silicates/Sulfur dioxide/NIMS
Target Name: Io
Is a satellite of: Jupiter
Mission: Galileo
Spacecraft: Galileo Orbiter
Instrument: Near Infrared Mapping Spectrometer
Product Size: 2000 x 2028 pixels (width x height)
Produced By: JPL
Producer ID: MRPS96236
Addition Date: 2000-05-18
Primary Data Set: Galileo EDRs
Full-Res TIFF: PIA02543.tif (4.722 MB)
Full-Res JPEG: PIA02543.jpg (347.4 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 Prometheus region of Jupiter's moon Io was imaged by the camera onboard NASA's Galileo spacecraft in July 1999 (A), and by the spacecraft's near-infrared mapping spectrometer during its October 10, 1999 flyby (B). The maps made from spectrometer data show the interplay between hot silicates on the surface and sulfur dioxide frost. Hot spots (active volcanoes) appear red in the spectrometer image (B), while sulfur dioxide frost appears blue. Hot spots known from prior observations are labeled 1 (Prometheus), 5 (Camaxtli), 7 (Tupan) and 8 (Culann). Hot spots labeled 2,3, 4, and 6 were first discovered in this observation. The color bar scale in (B) represents radiance in units of solar irradiance/pi. The sulfur dioxide deposition ring around Prometheus is clearly seen in the center of the image, formed as sulfur dioxide from the currently active plume condenses away from the vent. Image (C) is a map of the relative band-depth of the sulfur dioxide absorption band that is detected by the spectrometer. Image (D) is a qualitative map of the distribution of sulfur dioxide frost on the surface. The color bar in (D) represents the fractional area covered by sulfur dioxide frost. The area shown in each panel is about 1,300 km (800 miles) across.

The Jet Propulsion Laboratory, Pasadena, CA manages the mission for NASA's Office of Space Science, Washington, DC. JPL is a division of the California Institute of Technology, Pasadena, CA.

This image and other images and data received from Galileo are posted on the Galileo mission home page at http://solarsystem.nasa.gov/galileo/. Background information and educational context for the images can be found at http://galileo.jpl.nasa.gov/gallery/io.cfm.

Image Credit:
NASA/JPL

Image Addition Date:
2000-05-18