Margaret Uranian Satellite Fact Sheet

Uranian Satellite Fact Sheet


[Image of Uranus and some satellites]

Bulk parameters

                             Mass          Radius       Mean density    Visual geometric albedo
                          (1020 kg)         (km)          (kg/m3)
Major Satellites
  Miranda (UV)              0.66     240 x 234.2 x 232.9   1,200               0.27
  Ariel (UI)               13.5     581.1 x 577.9 x 577.7  1,670               0.35
  Umbriel (UII)            11.7             584.7          1,400               0.19
  Titania (UIII)           35.2             788.9          1,710               0.28
  Oberon (UIV)             30.1             761.4          1,630               0.25

Lesser Satellites
  Cordelia (UVI, S/1986 U7)                  20                                0.07
  Ophelia (UVII, S/1986 U8)                  21                                0.07
  Bianca (UVIII, S/1986 U9)                  26                                0.07
  Cressida (UIX, S/1986 U3)                  40                                0.07
  Desdemona (UX, S/1986 U6)                  32                                0.07
  Juliet (UXI, S/1986 U2)                    47                                0.07

  Portia (UXII, S/1986 U1)                   68                                0.07
  Rosalind (UXIII, S/1986 U4)                36                                0.07
  Cupid (S/2003 U2)                           5    
  Belinda (UXIV, S/1986 U5)                  40                                0.07
  Perdita (XXV, S/1986 U10)                  10
  Puck (UXV, S/1985 U1)                      81                                0.07
  Mab (S/2003 U1)                             5

  Francisco (XXII, S/2001 U3)                11
  Caliban (UXVI, S/1997 U1)                  36                                0.07
  Stephano (UXX, S/1999 U2)                  16                                0.07
  Trinculo (UXXI, S/2001 U1)                  9
  Sycorax (UXVII, S/1997 U2)                 75                                0.07

  Margaret (UXXIII, S/2003 U3)               10
  Prospero (UXVIII, S/1999 U3)               25                                0.07
  Setebos (UXIX, S/1999 U1)                  24                                0.07   
  Ferdinand (XXIV, S/2001 U2)                10                              



Orbital parameters

                                                          Orbital   Rotation 
                                      Semimajor axis        Period     Period   Inclination  Eccentricity
                               (103 km)  (Uranian Radii)    (days)     (days)    (degrees)
Major Satellites
  Miranda (UV)                   129.39      5.078         1.413479      S         4.22         0.0027
  Ariel (UI)                     191.02      7.481         2.520379      S         0.31         0.0034
  Umbriel (UII)                  266.30     10.41          4.144177      S         0.36         0.0050
  Titania (UIII)                 435.91     17.05          8.705872      S         0.14         0.0022
  Oberon (UIV)                   583.52     22.79         13.463239      S         0.10         0.0008

Lesser Satellites
  Cordelia (UVI, S/1986 U7)       49.77      1.947         0.335034                0.08         0.0003
  Ophelia (UVII, S/1986 U8)       53.79      2.104         0.376400                0.10         0.0099
  Bianca (UVIII, S/1986 U9)       59.17      2.315         0.434579                0.19         0.0009
  Cressida (UIX, S/1986 U3)       61.78      2.417         0.463570                0.01         0.0004
  Desdemona (UX, S/1986 U6)       62.68      2.452         0.473650                0.11         0.0001
  Juliet (UXI, S/1986 U2)         64.35      2.518         0.493065                0.07         0.0007

  Portia (UXII, S/1986 U1)        66.09      2.586         0.513196                0.06         0.0000
  Rosalind (UXIII, S/1986 U4)     69.94      2.736         0.558460                0.28         0.0001
  Cupid (S/2003 U2)               74.8       2.93          0.618   
  Belinda (UXIV, S/1986 U5)       75.26      2.944         0.623527                0.03         0.0001
  Perdita (XXV, S/1986 U10)       76.4       2.99          0.638                               
  Puck (UXV, S/1985 U1)           86.01      3.365         0.761833                0.32         0.0001
  Mab (S/2003 U1)                 97.7       3.82          0.923                                                

  Francisco (XXII, S/2001 U3)   4276.      167.3         266.6R                  145.2          0.146  
  Caliban (UXVI, S/1997 U1)     7230.      282.9         579.5R                  140.88         0.159
  Stephano (UXX, S/1999 U2)     8002.      313.1         676.5R                  144.06         0.230
  Trinculo (UXXI, S/2001 U1)    8571.      335.3         758.1R                  166.33         0.208
  Sycorax (UXVII, S/1997 U2)   12179.      476.5        1283.4R                  159.40         0.522

  Margaret (UXXIII, S/2003 U3) 14345.      561.3        1694.8                    56.6          0.661
  Prospero (UXVIII, S/1999 U3) 16418.      642.4        1992.8R                  151.91         0.443
  Setebos (UXIX, S/1999 U1)    17459.      683.1        2202.3R                  158.17         0.588
  Ferdinand (XXIV, S/2001 U2)  20900.      817.7        2823.4R                  169.8          0.368  
                          
R indicates retrograde motion
S indicates synchronous rotation - the rotation period is the same as the orbital period


 New Uranian Satellite Discovered (2002)
 New Uranian Satellite Discovered (1999)
 Two new Uranian Satellites Discovered (1997)
 Uranus' Known Satellites - Carnegie Institution, DTM


 Uranus Fact Sheet
 Uranus Home Page
bullet Notes on the Factsheets
 Directory to other Planetary Fact Sheets

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Author/Curator:
Dr. David R. Williams, dave.williams@nasa.gov
NSSDCA, Mail Code 690.1
NASA Goddard Space Flight Center
Greenbelt, MD 20771
+1-301-286-1258


NASA Official: Ed Grayzeck, edwin.j.grayzeck@nasa.gov
V1.0, 14 July 1995
Last Updated: 23 November 2007, DRW