The moon appears to be composed of equal parts water ice and rocky material, intermixed with small amounts of frozen methane.
Titania - Highest Resolution Voyager Picture Umbriel (“UM bree el”) is the thirteenth of Uranus’s known satellites and the third largest: orbit: 265,980 km from Uranus diameter: 1170 km mass: 1.27e21 kg.
The surface of Umbriel has far more and larger craters than do Ariel and Titania, ranging in diameter from a few kilometers to several hundred.
The bright ring near the moon's equator (at the top of the image), dubbed Wunda, is an enigmatic feature that appears to line the floor of an impact crater. Professor of Planetary Science, California Institute of Technology, Pasadena. A recent NASA Hubble Space Telescope view reveals Uranus surrounded by its four major rings and by 10 of its 17 known satellites. The mean radius of Uranus is 15,792 miles (25,362 kilometers), giving a diameter four times that of Earth. Uranus has five major moons: Miranda, Ariel, Umbriel, Titania, and Oberon. Umbriel has a diameter of 1,170 km (727 miles) and a The only images of Umbriel’s surface have come from the U.S. The prominent crater on the terminator (upper right) is about 110 km (70 mi) across and has a bright central peak. Umbriel (“UM bree el”) is the thirteenth of Uranus’s known satellites and the third largest:Umbriel and Oberon appear quite similar though Oberon is 35% larger. They range in diameter from 472 km for Miranda to 1578 km for Titania. Wunda has a large ring of bright material on its floor, which appears to be an impact deposit.
Umbriel juga tidak menunjukkan banyak aktivitas geologis.
It has a diameter of about 1,200 km (750 mi) and reflects only 16 percent of the light striking its surface; in the latter respect, Umbriel is similar to lunar highland areas. Umbriel was discovered in the year 1851 by William Lassell. Nyatanya, di antara satelit-satelit Uranus, hanya Oberon yang memiliki lebih banyak kawah tubrukan dibanding Umbriel.
Semua kawah Umbriel memiliki puncak di tengah, tapi tak memiliki sistem ray.
Umbriel (“UM bree el”) is the thirteenth of Uranus’s known satellites and the third largest: orbit: 265,980 km from Uranus diameter: 1170 km mass: 1.27e21 kg. Umbriel’s average diameter is 1,169.4 km or 727 miles with a mass of 1.2214 x 10 23 kg. 727 miles (1,170 km) 165,223 miles (265,970 km) 4.14 days.
Umbriel is the darkest of Uranus' larger moons and the one that appears to have experienced the lowest level of geological activity. All of Uranus’ large moons are a mixture of about 40-50% water ice with the rest rock, a somewhat larger fraction of rock than Saturn’s large moons such as Rhea.Umbriel is very dark; it reflects only about half as much light as Ariel, Uranus’ brightest satellite.The Nine Planets has been online since 1994 and was one of the first multimedia websites that appeared on the World Wide Web.Take an interactive tour of the solar system, or browse the site to find fascinating information, facts, and data about our planets, the solar system, and beyond. The strangest feature in this image (at top) is a curious bright ring, the most reflective area seen on Umbriel.
These moons range in diameter and mass from 472 km and 6.7 Ã- 1019 kg for Miranda to 1578 km and 3.5 Ã- 1021 kg for Titania. Lassell in 1851. It has a diameter of about 1,200 km (750 mi) and reflects only 16 percent of the light striking its surface; in the latter respect, Umbriel is similar to lunar highland areas. Diameter kawah yang diamati tercatat antara beberapa kilometer hingga 210 kilometer. Despite this, Umbriel is the darkest among the regular satellites of Uranus, with a geometric albedo of 0.26, half that of Ariel.
Mean Distance from Uranus.
It has a bright ring at its top (probably a crater floor) called a fluorescent cheerio.
Login Be on the lookout for your Britannica newsletter to get trusted stories delivered right to your inbox. Near Umbriel's equator lies the most prominent surface feature: Wunda crater, which has a diameter of about 131 km.
Umbriel is also the most heavily and uniformly cratered of the major Uranian moons, an indicator that its surface experienced little reworking by tectonic activity in the past. 4, top right) show a dark surface with a prominence of impact craters, ranging in size from a diameter of a few kilometers up to 200 km, many of them with central peaks. History at your fingertips
All these moons are relatively dark objects: their geometrical albedo varies between 30 and 50%, whereas their Bond albedo is between 10 and 23%.
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Its distance from Uranus is 266,000 km or 165,285 miles and takes 4.144 Earth days to make 1 complete orbit around the planet. Nearby, seen along the terminator, are the craters Vuver and Skynd, which lack bright rims but possess bright central peaks. This frame, taken through the clear-filter of Voyager's narrow-angle camera, is the most detailed image of Umbriel, with a resolution of about 10 km (6 mi).
Despite this, Umbriel is the darkest among the regular satellites of Uranus, with a geometric albedo of 0.26, half that of Ariel. Umbriel is the darkest moon and Ariel the brightest. Umbriel has a diameter of 1,170 km (727 miles) and a density of about 1.4 grams per cubic cm.
Orbital Period. Umbriel, along with another Uranian satellite Ariel, was discovered by William Lassell on October 24, 1851. Voyager 2 images (Fig.