Dione is one of the moons of Saturn, the sixth planet from the Sun

Discovery: Dione was discovered by the Italian-French astronomer Giovanni Domenico Cassini in 1684. It was named after one of the Titanesses from Greek mythology.

Orbit: Dione orbits Saturn in a prograde (forward) direction, along with many other moons of Saturn. Its average distance from Saturn is about 377,400 kilometers (234,500 miles). Dione takes approximately 2.7 days to complete one orbit around Saturn.

Size and Shape: Dione has a mean radius of approximately 561 kilometers (349 miles), making it one of the larger moons of Saturn. It has a predominantly spherical shape, although there are some variations in its surface due to impact craters and other geological features.

Surface Features: Dione's surface is characterized by a mixture of heavily cratered regions, linear cliffs (known as "chasmata"), and some smooth plains. The prominent features on Dione's surface suggest a combination of geological processes such as tectonic activity and impact cratering.

Composition: Dione is composed mostly of water ice, along with a smaller amount of rock. Its icy surface reflects sunlight, giving it a bright appearance.

Interaction with Saturn's Rings: Dione is known to interact with Saturn's rings, particularly the outermost E ring. It is believed to be a significant source of material for the E ring through processes such as surface eruptions and micrometeoroid impacts.