Moon of Saturn
Rhea
Rhea is a moon. It orbits Saturn. It is about 1,527 km across – smaller than our Moon. Rhea is Saturn's second-largest moon after Titan.
Fact file
- Type
- Moon of Saturn
- Diameter
- 1,527 km
- Distance from Saturn
- 527,100 km
- Orbital period
- 4.5 days
- Temperature
- -174 °C on average
Rhea orbits Saturn.
Interesting facts about Rhea
- Rhea is Saturn's second-largest moon after Titan.
- Its surface is mostly water ice and heavily cratered.
- Rhea may have a thin, partial ring of ice particles – a unique find for a moon.
Frequently asked questions about Rhea
How big is Rhea?
Rhea has a diameter of 1,527 km. That is about 44% of the diameter of our Moon.
How far is Rhea from Saturn?
Rhea orbits Saturn at an average distance of 527,100 km.
How long does Rhea take to orbit Saturn?
Rhea orbits Saturn once every 4.5 days.
How cold or warm is it on Rhea?
On Rhea the average temperature is −174 °C.
Formation
Rhea formed from Saturn's disc and is essentially a mixture of ice and rock.
Atmosphere
An extremely thin exosphere of oxygen and carbon dioxide was detected by Cassini.
Exploration
Mapped in detail by the Cassini probe (2004-2017).
Compared with Earth
Rhea is about 45% the size of our Moon.
Other moons of Saturn
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