Uranus' Moons


Cordelia (Uranus VI)
Cordelia is the innermost of Uranus' known satellites.

Orbit:49,752 km from Uranus
Diameter:26 km
Mass:?
Discovered by:Voyager 2 in 1986.

Cordelia appears to be the inner shepherding satellite for Uranus's Epsilon ring.
Cordelia and Ophelia orbit inside the synchronous orbit radius.
Ophelia (Uranus VII)
Ophelia is the second of Uranus' known satellites.

Orbit:53,764 km from Uranus
Diameter:32 km
Mass:?
Discovered by:Voyager 2 in 1986.

Ophelia appears to be the outer shepherding satellite for Uranus's Epsilon ring.
Bianca (Uranus VIII)
Bianca is the third of Uranus' known satellites.

Orbit:59,165 km from Uranus
Diameter:44 km
Mass:?
Discovered by:Voyager 2 in 1986.

Cressida (Uranus IX)
Cressida is the fourth of Uranus' known satellites.

Orbit:61,767 km from Uranus
Diameter:66 km
Mass:?
Discovered by: Voyager 2 in 1986.

Desdemona(Uranus X)
Desdemona is the fifth of Uranus' known satellites.

Orbit:,/font>62,659 km from Uranus
Diameter:58 km
Mass:?
Discovered by:Voyager 2 in 1986.

Juliet (Uranus XI)
Juliet is the sixth of Uranus' known satellites.

Orbit:64,358 km from Uranus
Diameter:84 km
Mass:?
Discovered by:Voyager 2 in 1986.

Portia (Uranus XII)
Portia is the seventh of Uranus' known satellites.

Orbit:66,097 km from Uranus
Diameter:110 km
Mass:?
Discovered by: Voyager 2 in 1986.

Rosalind (Uranus XIII)
Rosalind is the eighth of Uranus' known satellites.

Orbit:69,927 km from Uranus
Diameter:54 km
Mass:?
Discovered by:Voyager 2 in 1986.

Belinda (Uranus XIV)
Belinda is the ninth of Uranus' known satellites.

Orbit:75,255 km from Uranus
Diameter:68 km
Mass:?
Discovered by:Voyager 2 in 1986.

Puck (Uranus XV)
Puck is the tenth of Uranus' known satellites.

Orbit:86,006 km from Uranus
Diameter:154 km
Mass:?
Discovered by:Voyager 2 in 1986.

Of the 10 new Uranian moons discovered by Voyager 2, only Puck was discovered soon enough that the observation schedule could be adjusted to get images. Puck and the other small moons are very dark (albedo less than 0.1).


  • Difficulties;-
    1-Cressida and Bianca are within the Roche limit; are they stable or will they be disrupted?

    2-These small moons are all very dark; Uranus' larger moons are much brighter. Why?

    3-We know next to nothing about these moons. Even the basic orbital and size data are not very accurate

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    Last Modified : 5 Sep. 2001
    Created By#C0115361 Team