Io - Galileo

Two black and white global images of Jupiter's satellite Io

Two Galileo images of Jupiter's moon Io reveal some of the surface topography. The active volcanic features such as Loki Patera, the horseshoe shaped feature on the left side of the left image, appear to have relatively flat topography. Other regions show evidence of higher relief. The dark butterfly-shaped spot surrounded by the gray circle at the lower part of both images is the volcanic area Pele. The surface has undergone substantial change since the Voyager images were taken in 1979. The left image was taken from a range of 600,000 km and the right from 563,000 km on Galileo's 7th orbit of Jupiter. Features as small as about 12 km can be resolved in both images. Io is 3640 km in diameter and north is up. (Galileo, MRPS-84583)
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High resolution tif file (746K)

Location & Time Information
Date/Time (UT): 1997-04-04
Distance/Range (km): 600,000.
Central Latitude/Longitude (deg): N/A
Orbit(s): Flyby, 7th orbit of Jupiter

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: N/A
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: MRPS-84583
Other Image ID number: N/A
NSSDC Data Set ID (Photo): NSD XD-12A
NSSDC Data Set ID (CD): N/A
Other ID: N/A


[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: Ed Grayzeck,

Last updated: 24 September 2015