Umbriel

A moon from the planet Uranus.

General Information about Umbriel

Umbriel orbits around Uranus. It is one of the smallest of the moons from its planet. It has the largest craters of any of the moons. There has been confirmed CO2 found and traces of water. It is named after a character from a play written by Alexander Pope. It is Uninhabitable for any life because of the poisonous gasses. It also has a very icy outer shell

Discovery and Other Information About Umbriel

It was discovered in the year 1851 by a scientist named William Lassell. Voyager 2 was the first to photograph it in 1986. Umbriel is about a fourth of the size our our moon. When Voyager 2 photographed the moon, it did on its flyby of Uranus. Voyager 2 is the only spacecraft to photograph the moon. When it did photograph the moon, it was approximately 201,000 miles away.

Other Interesting Facts about Umbriel.

Umbriel has a relatively bright crater named the Fluorescent Cheerio. It also has a very extreme seasonal cycle because the way it is tipped, it contains 42 years of straight either darkness or sunlight for the North or South pole. It is the darkest of the moons, it also has a dirt/rock made surface. It also has one of the oldest surfaces of the moons from the planet.

Size, Mass, and Orbit of Umbriel

Ariel and Umbriel are nearly the same size, with diameters of 1,158 kilometers and 1,170 km. Astronomers believe that the majority of the planet consists of water ice, with a dense non-ice component making around 40% of its mass. The time it takes Umbriel to orbit Uranus is about 4.1 days. It is the 3rd farthest away from the planet out of all the moons.
Uranus Moon - Umbriel

Sources

Hamilton, C. J. (2011). Uranus' Moon Umbriel. Retrieved December 3, 2015, from http://solarviews.com/eng/umbriel.htm


Jackson, F. (1998). Uranus. In The Outer Planets (Vol. 4, Outer Space, pp. 43-44). Danbury, Connecticut: Groiler Incorperated.


Williams, M. (2015, June 5). Uranus' Moon Umbriel. Retrieved December 3, 2015, from http://www.universetoday.com/57061/umbriel/


The World Book (5th ed., Vol. 20, The World Book, p. 219). (2013). Chicago, Illinios: World Book.