Saturnian Satellite Fact Sheet


[Montage of Saturn and some of its satellites]

146 Confirmed Moons

Bulk parameters
  Mass
(1020 kg)
Radius
(km)
Mean density
(kg/m3)
Visual
geometric albedo
   
Major Satellites  
  Mimas (I) 0.379 208 x 197 x 191 1150 0.6
  Enceladus (II) 1.08 257 x 251 x 248 1610 1.0
  Tethys (III) 6.18 538 x 528 x 526 985 0.8
  Dione (IV) 11.0 563 x 561 x 560 1480 0.7
  Rhea (V) 23.1 765 x 763 x 762 1240 0.7
 
  Titan (VI) 1,345.5 2,575 1880 0.22
  Hyperion (VII) 0.056 180 x 133 x 103 550 0.3
  Iapetus (VIII) 18.1 746 x 746 x 712 1090 0.05 / 0.5
 
Lesser Satellites  
  S/2009 S1   0.3  
  Pan (XVIII, S/1981 S13) 0.00005 17 x 16 x 10 420 0.5
  Daphnis (XXXV, S/2005 S1) 0.000001 4.3 x 4.1 x 3.2 340  
  Atlas (XV, S/1980 S28) 0.00007 20 x 18 x 9 500 0.8
  Prometheus (XVI, S/1980 S27) 0.0016 68 x 40 x 30 480 0.5
  Pandora (XVII, S/1980 S26) 0.0014 52 x 41 x 32 490 0.7
  Epimetheus (XI, S/1980 S3) 0.0053 65 x 57 x 53 640 0.8
  Janus (X, S/1980 S1) 0.0190 102 x 93 x 76 630 0.9
 
  Aegaeon (LIII, S/2008 S1)   0.5    
  Methone (XXXII, S/2004 S1)   1.6    
  Anthe (XLIX, S/2007 S4)   1    
  Pallene (XXXIII, S/2004 S2)   2.9 x 2.8 x 2.0    
  Calypso (XIV, S/1980 S25) 0.00004 15 x 12 x 7 1000 1.0
  Telesto (XIII, S/1980 S13) 0.00007 16 x 12 x 10 1000 1.0
  Polydeuces (XXXIV, S/2004 S5)   1.5 x 1.2 x 1.0  
  Helene (XII, S/1980 S6) 0.0003 22 x 19 x 13 1300 0.7
 
  Kiviuq (XXIV, S/2000 S5)   7   0.06
  Ijiraq (XXII, S/2000 S6)   5   0.06
  S/2019 S1   1.5  
  Phoebe (IX) 0.083 109 x 109 x 102 1640 0.08
  Paaliaq (XX, S/2000 S2)   10   0.06
  Skathi (XXVII, S/2000 S8)   3   0.06
  S/2007 S2   3  
  S5605a2 (S/2004 S37)   4  
  Albiorix (XXVI, S/2000 S11)   13   0.06
  Bebhionn (XXXVII, S/2004 S11)   3  
  Erriapus (XXVIII, S/2000 S10)   4   0.06
  T522499 (S/2004 S31)   4  
  S2428b (LX, S/2004 S29)   4  
  Siarnaq (XXIX, S/2000 S3)   16   0.06
  Skoll (XLVII, S/2006 S8)   3  
  Tarvos (XXI, S/2000 S4)   7   0.06
 
  Tarqeq (LII, S/2007 S1)   3  
  Greip (LI, S/2006 S4)   3  
  Hyrrokkin (XLIV, S/2004 S19)   4  
  S/2004 S13   3  
  Mundilfari (XXV, S/2000 S9)   3   0.06
  S/2006 S1   3  
  Jarnsaxa (L, S/2006 S6)   3  
  Narvi (XXXI, S/2003 S1)   3   0.06
  Gridr (LIV, S/2004 S20)   4  
  Bergelmir (XXXVIII, S/2004 S15)   3  
  S/2007 S3   3  
  Suttungr (XXIII, S/2000 S12)   3   0.06
  Eggther (LIX, S/2004 S27)   4  
  Hati (XLIII, S/2004 S14)   3  
  S/2004 S17   2  
  S/2004 S12   3  
 
  Bestla (XXXIX, S/2004 S18)   3  
  Angrboda (LV, S/2004 S22)   3  
  Farbauti (XL, S/2004 S9)   3  
  Beli (LXI, S/2004 S30)   3  
  Thrymr (XXX, S/2000 S7)   3   0.06
  Gerd (LVII, S/2004 S25)   3  
  Aegir (XXXVI, S/2004 S10)   3  
  S/2006 S3   3  
  Skrymir (LVI, S/2004 S23)   4  
  Gunnlod (LXII, S/2004 S32)   4  
  S/2004 S07   3  
  S8386a (S/2004 S28)   4  
  Alvaldi (LXV, S/2004 S35)   4  
 
  Kari (XLV, S/2006 S2)   3  
  Fenrir (XLI, S/2004 S16)   2  
  Surtur (XLVIII, S/2006 S7)   3  
  S64454x (S/2004 S39)   2  
  Geirrod (LXVI, S/2004 S38)   4  
  Ymir (XIX, S/2000 S1)   9   0.06
  Loge (XLVI, S/2006 S5)   3  
  S8881b (S/2004 S24)   3  
  S5593a2 (S/2004 S36)   3  
  Thiazzi (LXIII, S/2004 S33)   4  
  S5602a (S/2004 S21)   3  
  S5613a2 (LXIV, S/2004 S34)   3  
  Fornjot (XLII, S/2004 S8)   3  
  S8353a (LVIII, S/2004 S26)   4  

See bottom of page for a list of satellites announced in 2023.


Orbital parameters
  Semi-major
axis
(103km)
Semi-major
axis
(Saturnian Radii)
Orbital
Period*
(days)
Rotation
Period
(days)
Inclination
(degrees)
Eccentricity
   
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) 1,221.87 20.273 15.945421 S 0.33 0.0292
  Hyperion (VII) 1,500.93 24.575 21.276609 C 0.43 0.1042
  Iapetus (VIII) 3,560.85 59.091 79.330183 S 14.72 0.0283
 
Lesser Satellites  
  S/2009 S1 117 1.94 0.4715   0.0 0.000
  Pan (XVIII, 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 (XV, S/1980 S28) 137.670 2.2820 0.6019   0.3 0.000
  Prometheus (XVI, S/1980 S27) 139.353 2.2843 0.6130   0.0 0.00204
  Pandora (XVII, S/1980 S26) 141.700 2.3512 0.6285   0.0 0.0042
  Epimetheus (XI, S/1980 S3) 151.422 2.5099 0.6942 S 0.34 0.009
  Janus (X, 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 (XXXII, S/2004 S1) 194 3.22 1.01  
  Anthe (XLIX, S/2007 S4) 197.7 3.28 1.04   0.1 0.001
  Pallene (XXXIII, S/2004 S2) 211 3.50 1.14  
  Calypso (XIV, S/1980 S25) 294.72 4.8892 1.8878   1.473 0.001
  Telesto (XIII, S/1980 S13) 294.72 4.8892 1.8878   1.158 0.001
  Polydeuces (XXXIV, S/2004 S5) 377.22 6.26 2.74  
  Helene (XII, S/1980 S6) 377.44 6.262 2.7369   0.0 0.005
 
  Kiviuq (XXIV, S/2000 S5) 11,110 184. 449   48.7 0.334
  Ijiraq (XXII, S/2000 S6) 11,120 185. 451   49.1 0.316
  S/2019 S1 11,250 187. 446   44.4 0.623
  Phoebe (IX) 12,944 215. 548R 0.4 174.8 0.164
  Paaliaq (XX, S/2000 S2) 15,200 252. 687   47.2 0.364
  Skathi (XXVII, S/2000 S8) 15,540 258. 728R   148.5 0.270
  S/2007 S2 15,850 263. 808R   176.7 0.218
  S5605a2 (S/2004 S37) 16,003 266. 753R   164.0 0.506
  Albiorix (XXVI, S/2000 S11) 16,180 268. 783   34.0 0.469
  Bebhionn (XXXVII, S/2004 S11) 17,120 284. 835   35.0 0.469
  Erriapus (XXVIII, S/2000 S10) 17,340 288. 871   34.6 0.474
  T522499 (S/2004 S31) 17,403 289. 854   48.11 0.242
  S2428b (LX, S/2004 S29) 17,471 290. 859   44.43 0.472
  Siarnaq (XXIX, 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 (XXI, S/2000 S4) 17,980 298. 926   33.8 0.531
 
  Tarqeq (LII, S/2007 S1) 18,010 299. 888   46.1 0.160
  Greip (LI, S/2006 S4) 18,210 302. 921R   179.8 0.326
  Hyrrokkin (XLIV, S/2004 S19) 18,440 306. 932R   151.4 0.333
  S/2004 S13 18,540 308. 933R   167.4 0.273
  Mundilfari (XXV, S/2000 S9) 18,690 310. 953R   169.4 0.210
  S/2006 S1 18,740 311. 1015R   154.2 0.130
  Jarnsaxa (L, S/2006 S6) 18,810 312. 965R   163.3 0.216
  Narvi (XXXI, S/2003 S1) 19,010 315. 1004R   145.8 0.431
  Gridr (LIV, S/2004 S20) 19,211 319. 990R   163.1 0.204
  Bergelmir (XXXVIII, S/2004 S15) 19,340 321. 1006R   158.5 0.142
  S/2007 S3 19,440 323. 1012R   176.6 0.143
  Suttungr (XXIII, S/2000 S12) 19,460 323. 1017R   175.8 0.114
  Eggther (LIX, S/2004 S27) 19,777 328. 1033R   167.1 0.120
  Hati (XLIII, S/2004 S14) 19,860 330. 1039R   165.8 0.372
  S/2004 S17 19,900 330. 986R   166.6 0.259
  S/2004 S12 19,910 330. 1046R   164.0 0.401
 
  Bestla (XXXIX, S/2004 S18) 20,130 334. 1084R   145.2 0.521
  Angrboda (LV, S/2004 S22) 20,380 338. 1080R   177.4 0.257
  Farbauti (XL, S/2004 S9) 20,390 338. 1086R   156.4 0.206
  Beli (LXI, S/2004 S30) 20,424 339. 1084R   156.3 0.113
  Thrymr (XXX, S/2000 S7) 20,470 340. 1094R   175.0 0.470
  Gerd (LVII, S/2004 S25) 20,545 341. 1095R   173.3 0.457
  Aegir (XXXVI, S/2004 S10) 20,740 344. 1117R   166.7 0.252
  S/2006 S3 21,410 355. 1227R   150.8 0.471
  Skrymir (LVI, S/2004 S23) 21,427 356. 1164R   177.7 0.399
  Gunnlod (LXII, S/2004 S32) 21,564 358. 1175R   158.5 0.262
  S/2004 S07 21,610 359. 1140R   165.1 0.580
  S8386a (S/2004 S28) 21,791 362. 1197R   171.0 0.133
  Alvaldi (LXV, S/2004 S35) 21,953 364. 1208R   176.4 0.182
 
  Kari (XLV, S/2006 S2) 22,120 367. 1234R   156.3 0.478
  Fenrir (XLI, S/2004 S16) 22,450 373. 1260R   164.9 0.136
  Surtur (XLVIII, S/2006 S7) 22,710 377. 1298R   177.5 0.451
  S64454x (S/2004 S39) 22,790 378. 1278R   167.6 0.081
  Geirrod (LXVI, S/2004 S38) 23,006 382. 1296R   155.0 0.381
  Ymir (XIX, S/2000 S1) 23,040 383. 1312R   173.1 0.335
  Loge (XLVI, S/2006 S5) 23,070 383. 1313R   167.9 0.187
  S8881b (S/2004 S24) 23,231 385. 1318   36.78 0.049
  S5593a2 (S/2004 S36) 23,699 393. 1354R   147.6 0.667
  Thiazzi (LXIII, S/2004 S33) 23,765 394. 1362R   161.5 0.417
  S5602a (S/2004 S21) 23,810 395. 1365R   154.6 0.312
  S5613a2 (LXIV, S/2004 S34) 24,359 404. 1413R   165.7 0.267
  Fornjot (XLII, S/2004 S8) 25,110 417. 1491R   170.4 0.206
  S8353a (LVIII, S/2004 S26) 26,738 444. 1624R   171.3 0.148
 

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

Satellites Announced in 2023

  Designation     Semimajor   Inclination   Magnitude   Diameter
                Axis (103 km)   (deg)                   est. (km)
   S/2005 S4        11333        52.46         25          4     
   S/2020 S1        11370        47.01         26          2    
   S/2006 S20       13199       174.8          25.5        3     
   S/2006 S9        14492       174.1          26          2      
   S/2007 S7        15861       169.3          26          2                
   S/2007 S5        15942       160.3          26          2               
   S/2004 S47       16044       159.7          26          2                  
   S/2004 S40       16189       169.8          26          2                   
   S/2019 S2        16613       176.1          26          2                 
   S/2007 S8        17040        37.83         25.8        2     
   S/2019 S3        17171       164.2          26          2               
   S/2020 S7        17283       160.8          26.5        2     
   S/2004 S41       17970       168.3          26          2               
   S/2020 S3        17980        47.10         26          2                
   S/2019 S4        18005       169.5          26          2              
   S/2019 S14       18053        50.09         26          2                
   S/2020 S2        18120       173.2          26          2              
   S/2020 S4        18165        43.40         27          2      
   S/2004 S42       18168       165.8          26          2                
   S/2020 S5        18470        49.40         26          2                 
   S/2007 S6        18614       165.8          26          2              
   S/2006 S10       18888       161.5          26          2               
   S/2004 S43       18969       172.0          26          2               
   S/2019 S5        18970       155.6          26          2               
   S/2004 S44       19531       169.0          25.4        3     
   S/2006 S11       19576       172.0          26          2                 
   S/2006 S12       19890        39.03         26          2                
   S/2019 S6        20050        46.30         25.8        2     
   S/2004 S45       20091       150.1          25.5        3      
   S/2006 S13       20127       164.8          25.8        2      
   S/2004 S46       20268       176.0          26          2                
   S/2019 S8        20364       173.9          26          2                
   S/2019 S7        20530       172.9          26          2              
   S/2019 S11       20574       150.6          26          2                  
   S/2007 S9        20603       156.7          25.5        2     
   S/2019 S9        20661       161.7          26          2              
   S/2019 S10       20974       161.2          26          2               
   S/2019 S12       20985       166.9          26          2                 
   S/2019 S13       21016       178.6          26          2                
   S/2005 S5        21087       172.5          25.8        2       
   S/2020 S6        21216       169.3          26          2                 
   S/2006 S14       21235       164.4          26          2                 
   S/2019 S15       21303       157.5          26.5        2      
   S/2006 S15       21638       161.3          25.7        2      
   S/2020 S8        21859       163.3          26          2              
   S/2006 S16       22050       165.2          26          2               
   S/2004 S50       22070       164.8          25.8        2     
   S/2004 S48       22422       159.9          25.5        3      
   S/2006 S17       22590       165.5          25.5        3       
   S/2004 S49       22920       158.3          25.7        2      
   S/2006 S19       23255       174.1          25.5        2     
   S/2019 S17       23300       156.3          25.5        3     
   S/2006 S18       23319       171.6          25.5        3      
   S/2019 S19       23535       146.8          26          2               
   S/2019 S20       23547       156.2          26.5        2     
   S/2019 S18       23619       148.4          26          2                
   S/2019 S16       23741       160.7          26          2                
   S/2004 S53       23828       161.0          25.8        2     
   S/2020 S10       25113       163.7          26.5        2     
   S/2004 S51       25840       169.6          25.5        3     
   S/2020 S9        26070       161.1          26          2              
   S/2019 S21       26146       171.5          26          2              
   S/2004 S52       26160       162.9          26          2               

New Jupiter and Saturn Satellites Reveal New Moon Dynamical Families - Publication on discovery of new Jovian and Saturnian satellites (May 2023)
Saturn Surpasses Jupiter After The Discovery Of 20 New Moons... - Carnegie DTM press release (15 October 2019)
Out from the shadows: Two new Saturnian moons - NASA press release (16 August 2004)
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


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

NASA
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: Dave Williams, david.r.williams@nasa.gov
V1.0, 13 July 1995
Last Updated: 6 December 2023, DRW