Io in 3D: live position and orbit

The innermost Galilean moon, shaped by intense volcanic activity driven by Jupiter tides.

Io is shown at its real position, computed from NASA/JPL ephemeris data. The view opens on Io; you can travel in time, switch between the educational overview and the true-scale voyage, and compare it with every other body of the solar system.

Orbits

Jupiter

Radius

1 821 km¹

Mass

8.93 × 10²² kg¹ (derived value)

Surface gravity

1.80 m/s²¹ (derived value)

Mean distance from Jupiter

421 800 km²

Orbital period

1.77 days²

Sidereal rotation

42.46 hours² (derived value)

Axial tilt

0.0°³ (derived value)

Missions

• Voyager
• Galileo
• Comet D/1993 F2 (Shoemaker-Levy 9) Collision into Jupiter
• Cassini-Huygens
• New Horizons
• Juno

Sources

1. NASA JPL Solar System Dynamics, Planetary Satellite Physical Parameters. read 2026-09-17. https://ssd.jpl.nasa.gov/sats/phys_par/
2. NASA NSSDCA, Planetary and Satellite Fact Sheets. read 2026-09-17. https://nssdc.gsfc.nasa.gov/planetary/planetfact.html
3. NASA NAIF, Generic PCK kernel (IAU rotational elements). read 2026-09-28. https://naif.jpl.nasa.gov/pub/naif/generic_kernels/pck/pck00011.tpc