Overview of Callisto Facts
Callisto Quick-Look Statistics
Discovery: Jan 7, 1610 by Galileo Galilei Diameter (km): 4,806 Mass (kg): 1.077e23 Mass (Earth = 1) 1.807e-02 Surface Gravity (Earth = 1): 0.127 Mean Distance from Jupiter (km): 1,883,000 Mean Distance From Jupiter (Rj): 26.6 Mean Distance from Sun (AU): 5.203 Orbital period (days): 16.68902 Rotational period (days): 16.68902 Density (gm/cm?3) 1.86 Orbit Eccentricity: 0.007 Orbit Inclination (degrees): 0.281 Orbit Speed (km/sec): 8.21 Escape velocity (km/sec): 2.45 Visual Albedo: 0.19 Subsolar Temperature (K) 168 Equatorial Subsurface Temperature (K) 126 Surface Composition: Dirty Ice A Summary of Facts about Callisto
Latest Callisto Science Findings
Frequently Asked Questions about Callisto
Educational Activities and Resources
The Mythology of Jupiter and it's Satellites
The planets and moons in our solar system are all named for characters in Greek
and Roman mythology. Here are some stories and artwork about the namesakes
of Jupiter and the Galilean satellites.
USGS Callisto Nomenclature page
The Discovery of the Galilean Satellites
Find out how Galileo Galilei discovered the moons around Jupiter.
Frequently asked Questions (FAQs)
Links to Related Sites
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