Io
Jupiter 501 Io
📋 A written introduction is coming — for now this page shows official values only.
Physical data
- Mean radius
- 1,821.49 km
- GM
- 5,959.9155 km³/s²
- Density
- 3.5276 g/cm³
Source:NASA JPL Solar System Dynamics · checked 2026-11-02 ↗
Orbit
- Semi-major axis
- 421,800 km
- Eccentricity
- 0.004
- Inclination
- 0°
- Orbital period
- 1.7627 days
- Retrograde
- No
Source:NASA JPL Solar System Dynamics · checked 2026-11-02 ↗
Related
Parent body
In everyday life
- Its diameter is about 29% of Earth's (radius 1,821 km ÷ Earth's 6,371 km).
- One orbit takes about 1.8 Earth days.
- About 421,800 km from Jupiter on average — 1,055 drives along the 400 km Seoul–Busan expressway.