Enceladus
Moon of Saturn
Facts
- Mean diameter
- 504 km
- Mean distance from the planet
- 238,400 km
- Orbital period
- 1.37 days
- Discovery
- William Herschel, 28 August 1789
Enceladus is a small moon of Saturn and the most reflective body in the Solar System. Jets of icy particles and gas stream out of its south pole, fed by a global ocean beneath the ice: the Cassini probe discovered them in 2005, and they supply Saturn's E ring.
At the south pole the ice shell may be only about 1 to 5 km thick. Enceladus has most of the chemical ingredients needed for life and probably hydrothermal vents on the ocean floor. It is named after a giant of Greek mythology.
Sources
- NASA/JPL Solar System Dynamics, Planetary Satellite Physical Parameters (radii from Archinal et al. 2018, Celest. Mech. 130, 22; Charon from Nimmo et al. 2017, Icarus 287, 12)
- NASA/JPL Solar System Dynamics, Planetary Satellite Mean Elements
- NASA/JPL Solar System Dynamics, Planetary Satellite Discovery Circumstances
- NASA Science, Enceladus