Dione

Moon

An icy moon of Saturn with bright, wispy cliffs of fractured ice.

Facts

TypeMoon
OrbitsSaturn
Distance from parent body377,400 km
Diameter1,123 km
Mass1.09 × 10^21 kg
Surface gravity0.233 m/s²
Temperature-186°C
Orbital period3 days
Apparent magnitude10.4
Redshift0
Discovered1684

Dione in context

At 1,123 km across, Dione is 32 percent of the diameter of Earth's Moon.

Its mass is less than a thousandth of the mass of Earth.

It orbits Saturn at 377,400 km, closer in than the Moon orbits Earth.

A single orbit takes 2.7 days.

An average temperature of 87 K works out at -186 degrees Celsius, colder than the 15 degrees Earth averages.

It has been on record since 1684.

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