Io - Voyager 1

Jupiter's moon Io, with Jupiter in the background

Voyager 1 image of Io against the background of Jupiter's clouds. Io is 3,600 km in diameter, about the size the Earth's Moon. The surface is coated with sulfur compounds, making it six times brighter than the Moon. The brightness variations seen may represent compositional and/or age differences. North is up. (Voyager 1, P-21162)
Larger image: 195K

High resolution tiff file (1.0M)

Location & Time Information
Date/Time (UT): 1979-02-27 T 10:00
Distance/Range (km): 7,000,000
Central Latitude/Longitude (deg): 00.,180.
Orbit(s): Flyby

Imaging Information
Area or Feature Type: global view
Instrument: Narrow Angle Vidicon Camera
Instrument Resolution (pixels): 800 x 800, 8 bit
Instrument Field of View (deg): .424 x .424
Filter: ultraviolet
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-21162
Other Image ID number: N/A
NSSDC Data Set ID (Photo): 77-084A-01c
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