Details : Item 214

 MomSonBirdCatDaughterDadDog
Terrestrial planets
Gas giants
Gas giants 2
Ice giants
Dwarf planets
Others

Famille : Ice giants/Dad
Umbriel
Moon of Uranus
Covered by numerous impact craters reaching
210 km in diameter. Since the Voyager 2 flyby (1986)
no other spacecraft has ever visited Uranus or Umbriel.
Properties
Albedo0.26
Radius (km)584.7
Mass (kg)1.172x10+21
Density (g/cm3)1.39
Gravity (m/s2)0.2
Orbital period (days)4.144
Orbital speed (km/s)4.67
Temperature (K)75
Discovery date1851 (W. Lassell)