Umbriel . Uranus II . Umbriel [UM-bree-ul] is the darkest satellite of Uranus. It is about the same size as Ariel and has about the same density. The surface appears to be old with large craters and does not change much from one location to another....
Larissa . Neptune VII - 1989N2, 1981N1 . Larissa [LA-ree-suh] is only about 48,800 kilometers (30,300 miles) from Neptune's clouds, and circles the planet in 13 hours, 18 minutes. ... Larissa circles the planet in the same direction as Neptune rotates,...
Helene . Saturn XII - 1980S6 . Helene was discovered by P. Laques and J. Lecacheus in 1980 through ground based observations. Helene is called a Dione Trojan satellite because it shares the same orbit as Dione at about 60 degrees ahead of its larger...
Puck . Uranus XV - 1985U1 . Puck was named after a mischievous fairy in Shakespeare's play Midsummer Night's Dream . It is the tenth known satellite of Uranus and was discovered by Voyager 2 . Puck Statistics . Discovered by . ... Equatorial radius (km)...
Leda . Jupiter XIII . Leda [LEE-duh] is the ninth known and smallest satellite of Jupiter. Leda was the queen of Sparta and the mother of Helen and Pollux. The picture shown above is the discovery image of Leda. ... Leda Statistics . ... Mass (Earth = 1...
Proteus . Neptune VIII - 1989N1 . Proteus [PROH-tee-us], like all six of Neptune's newly discovered small satellites, is one of the darkest objects in the solar system -- "as dark as soot" is not too strong of a description. ... Topographic Map of...
Sinope . Jupiter IX . Sinope [sah-NOH-pee] is the outermost known satellite of Jupiter. Very little is known about Sinope. Sinope Statistics . ... Mass (Earth = 1) . ... Equatorial radius (km) . ... Equatorial radius (Earth = 1) . ... Mean density (gm...
Phoebe . Saturn IX . Phoebe [FEE-bee] is the last of the known satellites of Saturn, at a distance of 12.952 million kilometers (8 million miles). Phoebe orbits Saturn in a retrograde direction (opposite to the direction of the other satellites' orbits)...
Despina . Neptune V - 1989N3 . Despina, only 27,700 kilometers (17,200 miles) from Neptune's clouds, orbits every 8 hours. Its diameter is about 150 kilometers (90 miles). ... Despina circles the planet in the same direction as Neptune rotates, and...