Umbriel (moon)
Umbriel is a moon of Uranus discovered on October 24, 1851, by William Lassell. Covered by numerous impact craters reaching 210 km in diameter, Umbriel is the second most heavily cratered satellite of UranUS after Oberon. The moon is also designated Uranus II. It orbits Uranus at the distance of about 266,000 km, being the third farthest from the planet among its five...
