This is a composite image of the small moons of Saturn.
Click on image for full size
Janus was discovered by A. Dollfus in 1966. Janus is the 5th closest moon to Saturn, with a standoff distance of 151,472 km. Janus is one of the small moons
, and is about the size of a county, at 110 x 80 km (75 x 53 miles) wide.
Janus and Epimetheus orbit Saturn together. They are only 50 km (33 miles) apart as they orbit Saturn, which is a little like having two moons in the same city. The fact that they are so close may mean that they are two pieces of what may once have been a single moon.
As a small moon, the composition and surface features of Janus are unknown.
Shop Windows to the Universe Science Store!
Our online store
on science education, classroom activities in The Earth Scientist
specimens, and educational games
You might also be interested in:
The small moons are too small to be seen, so not much is known about their surface or composition. With no knowledge of the composition, and no clues from the surface, little can be determined about the...more
The gas giant planet Saturn has a large group of // Call the moon count function defined in the document head print_moon_count('saturn'); moons. It also has the largest, most complex, and best-known ring...more
This is an image of the Earth's moon, shown in the lower left, with the much smaller icy moons of Saturn. The moons in order, starting from the top left are: Mimas, Enceladus, Tethys, Dione, Rhea, and...more
Dione was discovered by G. Cassini in 1684. Dione is the 7th farthest moon from Saturn, with a standoff distance of 377,400 km. It is a small icy moon, lightly cratered, with wispy white streaks across...more
The surface of Dione does not have many craters. Instead it has wispy white streaks similar to those found on Rhea extending for many kilometers over the entire surface. These two things indicate that...more
The surface of Enceladus does not have many craters. Instead it has grooves similar to those found on Ganymede. These grooves extend for many kilometers over the surface. The presence of grooves indicates...more
Helene was discovered by the French astronomers Pierre Laques, Raymond Despiau and J. Lecacheux on February 29, 1980. Even though Helene is so far away, they were able to make their discovery at an observatory...more
Hyperion was discovered by W. Bond in 1848. Hyperion is the 3rd farthest moon from Saturn, with a standoff distance of 1,481,000 km. Hyperion is 175 x 100 km (117 x 67 miles) in size. Its dimensions make...more