PIA01667: Io's Pele Hemisphere After Pillan Changes


Io’s Pele Hemisphere After Pillan Changes

Caption:

This global view of Jupiter's moon, Io, was obtained during the tenth orbit of Jupiter by NASA's Galileo spacecraft. Io, which is slightly larger than Earth's moon, is the most volcanically active body in the solar system. In this enhanced color composite, deposits of sulfur dioxide frost appear in white and grey hues while yellowish and brownish hues are probably due to other sulfurous materials. Bright red materials, such as the prominent ring surrounding Pele, and "black" spots with low brightness mark areas of recent volcanic activity and are usually associated with high temperatures and surface changes. One of the most dramatic changes is the appearance of a new dark spot (upper right edge of Pele), 400 kilometers (250 miles) in diameter which surrounds a volcanic center named Pillan Patera. The dark spot did not exist in images obtained 5 months earlier, but Galileo imaged a 120 kilometer (75 mile) high plume erupting from this location during its ninth orbit.

North is to the top of the picture which was taken on September 19, 1997 at a range of more than 500,000 kilometers (310,000 miles) by the Solid State Imaging (SSI) system on NASA's Galileo spacecraft.

Background Info:

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

Background information and educational context for the images can be found at http://www.jpl.nasa.gov/galileo/sepo .

Cataloging Keywords:

Name Value Additional Values
Target Io Earth, Jupiter
System Jupiter Earth
Target Type Satellite Earth, Planet
Mission Galileo
Instrument Host Galileo Orbiter
Host Type Orbiter Probe
Instrument Solid-State Imaging (SSI)
Detector
Extra Keywords Atmosphere, Color, Plume, Storm, Volcano
Acquisition Date
Release Date 1999-01-18
Date in Caption 1997-09-19
Image Credit NASA/JPL/University of Arizona
Source photojournal.jpl.nasa.gov/catalog/PIA01667
Identifier PIA01667