Io - Voyager 1

Image of Jupiter's moon Io from 438,000 km

Voyager 1 image of Jupiter's satellite Io from a distance of 450,000 km. The dark "heart-shaped" feature at upper left is Mafuike Patera, centered at 14 S, 260 W, with a diameter of about 110 km. The dark spot in the middle of this feature is the eruptive center, Pele. Io is so volcanically active that a volcanic plume from Pele was seen on another Voyager frame, and the appearance of Mafuike Patera had changed by the time Voyager 2 flew by 4 months later. Io is 3,600 km in diameter. North is at 1:00. (Voyager 1, FDS 16377.50)
Larger image: 334K

High resolution tiff file (1.0M)

Location & Time Information
Date/Time (UT): 1979-03-05
Distance/Range (km): 448,197.0
Central Latitude/Longitude (deg): - 16.79, 193.00
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: clear
Illumination Incidence Angle (deg): 43.00
Phase Angle (deg): 6.05
Instrument Look Direction: N/A
Surface Emission Angle (deg): 46.25

Ordering Information
CD-ROM Volume: VG_0018
NASA Image ID number: FDS 16377.50
Other Image ID number: Picno 1107J1-001
NSSDC Data Set ID (Photo): 77-084-01B
NSSDC Data Set ID (CD): 77-084A-01P
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