Object of the day ·
Moon
Io
Fun fact
Io is tidally locked: it spins once per orbit (42.5 hours), so the same face always points at its planet.
Worked out from the catalogue’s own measurements for Io.
Key stats
- Diameter
- 3,643 km
- From its planet
- 421,582 km
- Orbital period
- 42.5 hours
Explore the full record for Io
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