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Uranus Family
This montage of images of the Uranian system was prepared from an assemblage of images taken by the Voyager 2 spacecraft during its Uranus encounter in January 1986. This artist's view shows Ariel in the forefront, Uranus rising behind, Umbriel off to the left, Miranda in the foreground to the right, Titania fading in the distance at the far right, and Oberon in its distant orbit at the top.
The following table summarizes the radius, mass, distance from the planet center, discoverer and the date of discovery of each of the moons of Uranus:

                Radius Mass      Distance
Moon       #    (km)   (kg)      (km)       Discoverer   Date
-------------------------------------------------------------
Cordelia   VI    13    ?          49,750    Voyager 2    1986
Ophelia    VII   16    ?          53,760    Voyager 2    1986
Bianca     VIII  22    ?          59,160    Voyager 2    1986
Cressida   IX    33    ?          61,770    Voyager 2    1986
Desdemona  X     29    ?          62,660    Voyager 2    1986
Juliet     XI    42    ?          64,360    Voyager 2    1986
Portia     XII   55    ?          66,100    Voyager 2    1986
Rosalind   XIII  27    ?          69,930    Voyager 2    1986
Belinda    XIV   34    ?          75,260    Voyager 2    1986
Puck       XV    77    ?          86,010    Voyager 2    1985
Miranda    V    235.8  6.33e+19  129,780    G. Kuiper    1948
Ariel      I    578.9  1.27e+21  191,240    W. Lassell   1851
Umbriel    II   584.7  1.27e+21  265,970    W. Lassell   1851
Titania    III  788.9  3.49e+21  435,840    W. Herschel  1787
Oberon     IV   761.4  3.03e+21  582,600    W. Herschel  1787