Saturnian Satellite Fact Sheet


[Montage of Saturn and some of its satellites]

Bulk parameters

                                 Mass         Radius       Mean density    Visual geometric albedo
                              (1020 kg)          (km)        (kg/m3)
Major Satellites
  Mimas (SI)                     0.379     208 x 197 x 191     1150                 0.6
  Enceladus (SII)                1.08      257 x 251 x 248     1610                 1.0
  Tethys (SIII)                  6.18      538 x 528 x 526      985                 0.8
  Dione (SIV)                   11.0       563 x 561 x 560     1480                 0.7
  Rhea (SV)                     23.1       765 x 763 x 762     1240                 0.7

  Titan (SVI)                1,345.5           2,575           1880                 0.22
  Hyperion (SVII)                0.056     180 x 133 x 103      550                 0.3
  Iapetus (SVIII)               18.1       746 x 746 x 712     1090             0.05 / 0.5

Lesser Satellites
  Pan (SXVIII, S/1981 S13)       0.00005     17 x 16 x 10       420                 0.5
  Daphnis (SXXXV, S/2005 S1)     0.000001   4.3 x 4.1 x 3.2     340                       
  Atlas (SXV, S/1980 S28)        0.00007     20 x 18 x 9        500                 0.8
  Prometheus (SXVI, S/1980 S27)  0.0016      68 x 40 x 30       480                 0.5
  Pandora (SXVII, S/1980 S26)    0.0014      52 x 41 x 32       490                 0.7
  Epimetheus (SXI, S/1980 S3)    0.0053      65 x 57 x 53       640                 0.8
  Janus (SX, S/1980 S1)          0.0190     102 x 93 x 76       630                 0.9

  Aegaeon (LIII, S/2008 S1)                        0.5
  Methone (SXXXII, S/2004 S1)                      1.6           
  Anthe (XLIX, S/2007 S4)                         ~1       
  Pallene (SXXXIII, S/2004 S2)              2.9 x 2.8 x 2.0
  Calypso (SXIV, S/1980 S25)     0.00004     15 x 12 x 7       1000                 1.0
  Telesto (SXIII, S/1980 S13)    0.00007     16 x 12 x 10      1000                 1.0
  Helene (SXII, S/1980 S6)       0.0003      22 x 19 x 13      1300                 0.7
  Polydeuces (SXXXIV, S/2004 S5)            1.5 x 1.2 x 1.0

  Kiviuq (SXXIV, S/2000 S5)                       ~7                                0.06
  Ijiraq (SXXII, S/2000 S6)                       ~5                                0.06
  Phoebe (SIX)                   0.083     109 x 109 x 102     1640                 0.08
  Paaliaq (SXX, S/2000 S2)                       ~10                                0.06
  Skathi (SXXVII, S/2000 S8)                      ~3                                0.06
  Albiorix (SXXVI, S/2000 S11)                   ~13                                0.06
  Bebhionn (XXXVII, S/2004 S11)                   ~3                      
  Erriapo (SXXVIII, S/2000 S10)                   ~4                                0.06
  Siarnaq (SXXIX, S/2000 S3)                     ~16                                0.06
  Skoll (XLVII, S/2006 S8)                        ~3    
  Tarvos (SXXI, S/2000 S4)                        ~7                                0.06
  Tarqeq (SLII, S/2007 S1)                        ~3                                            

  Greip (SLI, S/2006 S4)                          ~3                                                                                      
  Hyrrokkin (SXLIV, S/2004 S19)                   ~4                                                 
  Mundilfari (SXXV, S/2000 S9)                    ~3                                0.06
  Jarnsaxa (SL, S/2006 S6)                        ~3                                                
  Narvi (SXXXI, S/2003 S1)                        ~3                                0.06
  Bergelmir (XXXVIII, S/2004 S15)                 ~3                     
  Suttungr (SXXIII, S/2000 S12)                   ~3                                0.06
  Hati (XLIII, S/2004 S14)                        ~3                      
  Bestla (SXXXIX, S/2004 S18)                     ~3                     
  Farbauti (SXL, S/2004 S9)                       ~3                     
  Thrymr (SXXX, S/2000 S7)                        ~3                                0.06
  Aegir (SXXXVI, S/2004 S10)                      ~3                      
  Kari (SXLV, S/2006 S2)                          ~3                                                
  Fenrir (SXLI, S/2004 S16)                       ~2                       
  Surtur (SXLVIII, S/2006 S7)                     ~3                                                
  Loge (SXLVI, S/2006 S5)                         ~3                                                                                      
  Ymir (SXIX, S/2000 S1)                          ~9                                0.06
  Fornjot (SXLII, S/2004 S8)                      ~3  

  
Recently Discovered (Unnamed) Satellites

  S/2004 S07                                      ~3
  S/2004 S12                                      ~3                     
  S/2004 S13                                      ~3                      
  S/2004 S17                                      ~2                     

  S/2006 S1                                       ~3                                                     
  S/2006 S3                                       ~3                                                

  S/2007 S2                                       ~3
  S/2007 S3                                       ~3

  S/2009 S1                                        0.3


Orbital parameters

                                                                  Orbital   Rotation 
                                           Semimajor axis         Period*    Period    Inclination  Eccentricity
                                    (103 km)  (Saturnian Radii)   (days)     (days)     (degrees)
Major Satellites
  Mimas (SI)                         185.52        3.0783       0.9424218     S           1.53        0.0202
  Enceladus (SII)                    238.02        3.9494       1.370218      S           0.00        0.0045
  Tethys (SIII)                      294.66        4.8892       1.887802      S           1.86        0.0000
  Dione (SIV)                        377.40        6.2620       2.736915      S           0.02        0.0022
  Rhea (SV)                          527.04        8.7449       4.517500      S           0.35        0.0010
 
  Titan (SVI)                      1,221.83       20.273       15.945421      S           0.33        0.0292
  Hyperion (SVII)                  1,481.1        24.575       21.276609      C           0.43        0.1042
  Iapetus (SVIII)                  3,561.3        59.091       79.330183      S          14.72        0.0283

Lesser Satellites
  Pan (SXVIII, S/1981 S13)           133.583       2.2165       0.5750                    0.0         0.000
  Daphnis (XXXV, S/2005 S1)          136.500       2.26         0.594                     0.0         0.000
  Atlas (SXV, S/1980 S28)            137.670       2.2820       0.6019                    0.3         0.000
  Prometheus (SXVI, S/1980 S27)      139.353       2.2843       0.6130                    0.0         0.0024
  Pandora (SXVII, S/1980 S26)        141.700       2.3512       0.6285                    0.0         0.0042
  Epimetheus (SXI, S/1980 S3)        151.422       2.5099       0.6942        S           0.34        0.009
  Janus (SX, S/1980 S1)              151.472       2.5125       0.6945        S           0.14        0.007

  Aegaeon (LIII, S/2008 S1)          167.5         2.78         0.8081                    0.001       0.0002
  Methone (SXXXII, S/2004 S1)        194           3.22         1.01        
  Anthe (XLIX, S/2007 S4)            197.7         3.28         1.04                      0.1         0.001
  Pallene (SXXXIII, S/2004 S2)       211           3.50         1.14
  Calypso (SXIV, S/1980 S25)         294.66        4.8892       1.8878                    1.473       0.001
  Telesto (SXIII, S/1980 S13)        294.66        4.8892       1.8878                    1.158       0.001
  Helene (SXII, S/1980 S6)           377.40        6.262        2.7369                    0.0         0.005
  Polydeuces (SXXXIV, S/2004 S5)     377.40        6.26         2.74 

  Kiviuq (SXXIV, S/2000 S5)       11,110         184.            449                     48.7         0.334            
  Ijiraq (SXXII, S/2000 S6)       11,120         185.            451                     49.1         0.316           
  Phoebe (SIX)                    12,944         215.            548R        0.4        174.8         0.164
  Paaliaq (SXX, S/2000 S2)        15,200         252.            687                     47.2         0.364           
  Skathi (SXXVII, S/2000 S8)      15,540         258.            728R                   148.5         0.270
  Albiorix (SXXVI, S/2000 S11)    16,180         268.            783                     34.0         0.469
  Bebhionn (XXXVII, S/2004 S11)   17,120         284.            835                     35.0         0.469  
  Erriapo (SXXVIII, S/2000 S10)   17,340         288.            871                     34.6         0.474
  Siarnaq (SXXIX, S/2000 S3)      17,530         291.            896                     45.6         0.295
  Skoll (XLVII, S/2006 S8)        17,670         293.            878R                   161.2         0.464                 
  Tarvos (SXXI, S/2000 S4)        17,980         298.            926                     33.8         0.531
  Tarqeq (SLII, S/2007 S1)        18,010         299.            888                     46.1         0.160

  Greip (SLI, S/2006 S4)          18,210         302.            921R                   179.8         0.326 
  Hyrrokkin (SXLIV, S/2004 S19)   18,440         306.            932R                   151.4         0.333
  Mundilfari (SXXV, S/2000 S9)    18,690         310.            953R                   169.4         0.210
  Jarnsaxa (SL, S/2006 S6)        18,810         312.            965R                   163.3         0.216                          
  Narvi (SXXXI, S/2003 S1)        19,010         315.           1004R                   145.8         0.431
  Bergelmir (XXXVIII, S/2004 S15) 19,340         321.           1006R                   158.5         0.142  
  Suttungr (SXXIII, S/2000 S12)   19,460         323.           1017R                   175.8         0.114
  Hati (XLIII, S/2004 S14)        19,860         330.           1039R                   165.8         0.372  
  Bestla (SXXXIX, S/2004 S18)     20,130         334.           1084R                   145.2         0.521  
  Farbauti (SXL, S/2004 S9)       20,390         338.           1086R                   156.4         0.206  
  Thrymr (SXXX, S/2000 S7)        20,470         340.           1094R                   175.0         0.470
  Aegir (SXXXVI, S/2004 S10)      20,740         344.           1117R                   166.7         0.252  
  Kari (SXLV, S/2006 S2)          22,120         367.           1234R                   156.3         0.478                          
  Fenrir (SXLI, S/2004 S16)       22,450         373.           1260R                   164.9         0.136  
  Surtur (SXLVIII, S/2006 S7)     22,710         377.           1298R                   177.5         0.451       
  Ymir (SXIX, S/2000 S1)          23,040         383.           1312R                   173.1         0.335
  Loge (SXLVI, S/2006 S5)         23,070         383.           1313R                   167.9         0.187
  Fornjot (SXLII, S/2004 S8)      25,110         417.           1491R                   170.4         0.206   


Recently Discovered (Unnamed) Satellites

  S/2004 S07                      21,000         348.           1140R                   165.1         0.580      
  S/2004 S12                      19,890         330.           1046R                   164.0         0.401  
  S/2004 S13                      18,400         305.            933R                   167.4         0.273  
  S/2004 S17                      19,450         323.            986R                   166.6         0.259  

  S/2006 S1                       18,980         315.           1015R                   154.2         0.130                              
  S/2006 S3                       22,100         367.           1227R                   150.8         0.471                

  S/2007 S2                       16,730         278.            808R                   176.7         0.218
  S/2007 S3                       18,980         315.            978R                   177.2         0.130

  S/2009 S1                          117           1.94            0.4715                 0.0         0.000

*R indicates retrograde motion
S indicates synchronous rotation - the rotation period is the same as the orbital period
C indicates chaotic rotation

 Out from the shadows: Two new Saturnian moons - NASA press release (16 August 2004)
 Discovery of two new moons of Saturn announced - IAU circulars 7545 and 7548
 Discovery of four new moons of Saturn announced - IAU circulars 7538 and 7539
 Discovery of two new moons of Saturn announced - IAU circular 7521
 Discovery of four new moons of Saturn announced - Cornell University Press Release
 Ring plane crossings yield no new satellite discoveries
 Saturn's Known Satellites - Carnegie Institution, DTM

There are uncertainties in most radius values, most regular satellite values rounded from P.C. Thomas, Icarus, 208, 395-401, 2010


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Author/Curator:
Dr. David R. Williams, dave.williams@nasa.gov
NSSDC, 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, 13 July 1995
Last Updated: 22 February 2011, DRW