Io - Galileo

Color image of Jupiter's satellite Io

This Galileo image mosaic of Jupiter's moon Io was made of pictures taken from 130,000 km, during Galileo's closest flyby of Io on 3 July 1999. The color is approximately what the human eye would see. Dark gray and bright red colors denote volcanic features, and many bright colored flows can be seen. Large scale changes in the appearance of the surface have been observed from earlier Voyager and galileo images of Io, which is considered to be the most volcanically active body in the solar system. Io is 3640 km in diameter, features as small as about 3 km can be resolved. North is up. (Galileo, P-50548)
Larger image (196K) jpg

High resolution tif file ( 16M)

Location & Time Information
Date/Time (UT): 1999-07-03
Distance/Range (km): 130,000.
Central Latitude/Longitude (deg): N/A
Orbit(s): Flyby

Imaging Information
Area or Feature Type: global view
Instrument: Solid State Imaging CCD Camera
Instrument Resolution (pixels): 800 x 800, 8 bit
Instrument Field of View (deg): 0.46 x 0.46
Filter: near-infrared, green, violet
Illumination Incidence Angle (deg): N/A
Phase Angle (deg): N/A
Instrument Look Direction: N/A
Surface Emission Angle (deg): N/A

Ordering Information
CD-ROM Volume: N/A
NASA Image ID number: P-50548
Other Image ID number: N/A
NSSDC Data Set ID (Photo): NSD XD-12A
NSSDC Data Set ID (CD): N/A
Other ID: MRPS95196


[NASA Logo] Authors/Curators:

Dave Williams,, (301) 286-1258
Code 690.1, NASA Goddard Space Flight Center
Greenbelt, MD 20771, USA

Jay Friedlander,, (301) 286-7172
Code 612.4, NASA Goddard Space Flight Center
Greenbelt, MD 20771, USA

NASA Official: Dr. David R. Williams,

Last updated: 24 September 2015