Saturnian Satellite Fact Sheet

[Montage of Saturn and some of its satellites]

128 new Saturnian satellite discoveries were announced in March, 2025, bringing the total number of confirmed moons to 274.
The list below contains information for the 146 previously 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: 18 March 2025, DRW