16. Io

16. Io

Courtesy of NASA/JPL/University of Arizona/University of Colorado

http://photojournal.jpl.nasa.gov/catalog/PIA00583


Moon of Jupiter

Diameter: 3,630 km
Orbit Radius: 422,000 km
Orbital Period: 1.8 days
Rotational Period: 1.8 days
Average Temperature: -143°C
Max/Min Temperature: 27°C/-143°C
Composition: Rocky
Atmosphere: SO2
Atmospheric Pressure: 0.000000001 bars
Gravity (Earth=1): 0.184
Mass (Earth=1): 0.015
Magnetic Field: Unknown