Exploring the Planets

The Moons of Saturn


Montage of Saturnian System constructed from Voyager 1 imagery.
NASA Press Release #P23209
Credit: NASA Planetary Photojournal

Like Jupiter, Saturn has several icy moons and small asteroid-like objects in orbit around the planet. Their sizes range from 5150 kilometers (3200 miles) down to 20 kilometers (12 miles) in diameter, although smaller satellites are likely to exist.

Both the orbital dynamics of these moons and their distinctly different compositions make the Saturnian satellites a small-scale analog of our solar system.

Six of Saturn's moons are shown in the image at left. Dione is in foreground, Tethys and Mimas to the right of Saturn, Enceladus and Rhea off Saturn's rings to the left, and Titan at top right.

Saturn's Moons

Name Discoverer Diameter Distance from Saturn Orbital Period (days)
Mimas Herschel, 1789 390 km/242 mi 185,520 km/115,280 mi .94
Enceladus Herschel, 1789 500 km/311 mi 238,020 km/147,900 mi 1.37
Tethys Cassini, 1684 1,060 km/659 mi 294,660 km/183,000 mi 1.89
Dione Cassini, 1684 1,120 km/696 mi 377,400 km/234,500 mi 2.74
Rhea Cassini, 1672 1,530 km/951 mi 527,040 km/327,500 mi 4.52
Titan Huygens, 1655 5,150 km/3,200 mi 1,221,850 km/759,200 mi 15.95
Hyperion Bond, 1971 255 km/159 mi 1,481,000 km/920,300 mi 21.28
Iapetus Cassini, 1671 1,460 km/907 mi 3,561,300 km/2,212,900 mi 79.33

Saturn has more than 50 moons. To see a listing of all of Saturn’s moons, check out JPL's Planetary Satellite page here.