IO.
A world of active volcanoes.
SCHEMATIC / NOT A SURFACE MAP
01 /
The measured world
- Mean radius
- 1,821.6 km
- Mean diameter
- 3,643.2 km
- Gravity
- 1.796 m/s²
- Orbit around Jupiter
- 1.769 Earth days
Rounded reference values. Rotation is sidereal and differs from the solar day. Giant planets have no solid surface; temperature and gravity use atmospheric reference levels. Some moon counts are omitted because discoveries change them.
Compare with Earth