Io - Galileo

Color image of the Loki-Pele hemisphere of Jupiter's satellite Io

This image of Io was taken by Galileo on its 6th orbit of Jupiter. Changes can be seen in the surface since the first orbit eight months earlier. The dark butterfly-shaped spot surrounded by the red circle at lower right is the volcanic complex Pele. The dark horseshoe-shaped feature left of center is Loki Patera, and the dark spot north of Loki is Amaterasu Patera, which has darkened noticeably since the first orbit. Ra Patera, below Loki has faded somewhat over this time. The varied colors are due to sulfur rich compounds, darker areas are thought to be more recent volcanic activity. Io is 3640 km in diameter and north is up. (Galileo, MRPS-84935)
Larger image (108K) jpg

High resolution tif file (1.2M)

Location & Time Information
Date/Time (UT): 1997-02-20
Distance/Range (km): 554,000.
Central Latitude/Longitude (deg): N/A
Orbit(s): Flyby, 6th 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: violet, green, near-infrared
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-84935
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