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The major moons of Uranus are airless bodies. For instance, Titania was shown to possess no atmosphere at a pressure larger than 10–20 nanobar. [42] The path of the Sun in the local sky over the course of a local day during Uranus's and its major moons' summer solstice is quite different from that seen on most other Solar System worlds.
The moons of the trans-Neptunian objects (other than Charon) have not been included, because they appear to follow the normal situation for TNOs rather than the moons of Saturn and Uranus, and become solid at a larger size (900–1000 km diameter, rather than 400 km as for the moons of Saturn and Uranus).
Mab orbits at the same distance from Uranus as the μ ring (formerly known as R/2003 U 1), a dusty ring discovered around the same time as Mab. The moon is nearly the optimal size for dust production, since larger moons can recollect the escaping dust and smaller moons have too small surface areas for supplying the ring via ring particle or ...
This discovery image shows the new Uranian moon S/2023 U1 using the Magellan telescope on November 4, 2023. Uranus (upper left) is just off the field of view.
As the below graph demonstrates, the maximum absolute magnitude (total inherent brightness, abbreviated H) of moons we have detected around planets occurs at H = 18 for Jupiter, H = 17 for Saturn, H = 14 for Uranus, and H = 12 for Neptune. Smaller moons may (and most likely do) exist around each of these planets, but are currently undetectable ...
Uranus's Frankensteinian moon Miranda looks like it’s been torn apart and stitched back together a thousand times. Miranda, the innermost of the planet's five major moons, has a bizarre surface.
Oberon is the second-largest and second-most massive of the Uranian moons after Titania, and the ninth-most massive moon in the Solar System. [ f ] It is the tenth-largest moon by size however, since Rhea , the second-largest moon of Saturn and the ninth-largest moon, is nearly the same size as Oberon although it is about 0.4% larger, despite ...
Among Uranus's five major moons, Ariel is the second closest to the planet, orbiting at the distance of about 190,000 km. [f] Its orbit has a small eccentricity and is inclined very little relative to the equator of Uranus. [3] Its orbital period is around 2.5 Earth days, coincident with its rotational period.