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Io

[Image of Io]

Mean Radius:
1830 km

Mass:
8.94x1022 kg

Orbital Period:
1.769 Earth days

Rotation Period:
1.769 Earth days

Orbit:
422,600 km from Jupiter

Io one of the four Galilean moons of Jupiter. The other Galilean moons are Ganymede, Callisto, and Europa.

Web Pages with Information about Io

Astrogeology Research Program

Io's Aurorae: Images and observations about Cassini images of Io's visible aurorae during an eclipse
Jovian Satellites: Voyager and Galileo global image mosaics
Browse the Solar System: Interactive version of our popular poster Mapping the Solar System
Browse the Geologic Solar System: Interactive version of our popular poster Geology of the Solar System
Planetary Maps: Searchable comprehensive listing of published planetary maps, with links to digital versions when available.
Geologic Mapping: Download digital geologic maps, learn about our geologic mapping efforts, and access geologic mapping resources from the Planetary Geologic Mapping Program
Gazetteer of Planetary Nomenclature: Information about and access to the official International Astromical Union approved names for planetary features
Cartographic Coordinates and Rotational Elements of the Planets and Satellites - IAU Working Group: IAU CCRE Working Group, information, publications, and references, including tables of the accepted values for the size, shape, and rotations of the planets and satellites
NASA Planetary Photojournal: Images from various Solar System exploration programs
Geographic Information Systems (GIS) - GIS data, maps, tools, and discussion board on the PIGWAD Planetary Geographic Information Systems web site

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