Jovian Satellite Fact Sheet

Jupiter and the Galilean Satellites

95 Confirmed Moons

Bulk parameters
  Mass
(1020 kg)		 Radius
(km)		 Mean density
(kg/m3)		 Visual
geometric albedo
   
Galilean Satellites  
  Io (I) 893.2 1821.5 3530 0.62
  Europa (II) 480.0 1560.8 3010 0.68
  Ganymede (III) 1481.9 2631.2 1940 0.44
  Callisto (IV) 1075.9 2410.3 1830 0.19
 
Lesser Satellites  
  Metis (XVI, S/1979 J3) 0.001 30 x 20 x 17   0.06
  Adrastea (XV, S/1979 J1) 0.0002 10 x 8 x 7   0.10
  Amalthea (V) 0.075 125 x 73 x 64 3100 0.09
  Thebe (XIV, S/1979 J2) 0.008 58 x 49 x 42   0.05
 
  Themisto (XVIII, S/1975 J1)   4.5   0.04
 
  Leda (XIII) 0.00006 9   0.07
  Himalia (VI) 0.095 85   0.03
  Ersa (LXXI, S/2018 J1)   1.5  
  S/2018 J2   1.5  
  Pandia (LXV, S/2017 J4)   1.5  
  Lysithea (X) 0.0008 12   0.06
  Elara (VII) 0.008 40   0.03
  S/2011 J3   1.5  
  Dia (LIII, S/2000 J11)   2.0   0.04
 
  S/2018 J4   1.0  
  Carpo (XLVI, S/2003 J20)   1.5  
  Valetudo (LXII, S/2016 J2)   0.5  
  Euporie (XXXIV, S/2001 J10)   1.0  
 
  S/2003 J18 (LV)   2.0  
  S/2010 J2 (LII)   2.0  
  S/2003 J16   2.0  
  S/2003 J2   2.0  
  S/2017 J7 (LXVIII)   1.0  
  S/2016 J1 (LIV)   0.5  
  S/2017 J3 (LXIV)   1.0  
  Orthosie (XXXV, S/2001 J9)   1.0  
  S/2021 J1   0.5  
  Euanthe (XXXIII, S/2001 J7)   1.5  
  Thyone (XXIX, S/2001 J2)   2.0  
 
  S/2022 J3   1.0  
  Mneme (XL, S/2003 J21)   2.0  
  Harpalyke (XXII, S/2000 J5)   2.2   0.04
  Hermippe (XXX, S/2001 J3)   2.0  
  Praxidike (XXVII, S/2000 J7)   3.4   0.04
  Thelxinoe (XLII, S/2003 J22)   2.0  
  S/2021 J2   0.5  
  Eupheme (LX, S/2003 J3)   2.0  
  Helike (XLV, S/2003 J6)   4.0  
  Iocaste (XXIV, S/2000 J3)   2.6   0.04
  Ananke (XII) 0.0004 14   0.06
  S/2017 J9 (LXX)   1.5  
  S/2021 J3   1.0  
  S/2003 J12   1.0  
 
  S/2022 J1   1.0  
  S/2003 J4   2.0  
  S/2016 J3   1.0  
  S/2017 J6 (LXVII)   1.0  
  S/2011 J1 (LXXII)   1.0  
  S/2022 J2   1.0  
  S/2003 J19 (LXI)   2.0  
  Philophrosyne (LVIII, S/2003 J15)   1.0  
  Eurydome (XXXII, S/2001 J4)   1.5  
  S/2018 J3   0.5  
  S/2021 J5   1.0  
  S/2003 J10   2.0  
  Arche (XLIII, S/2002 J1)   1.5  
 
  S/2021 J4   0.5  
  Autonoe (XXVIII, S/2001 J1)   2.0  
  Pasithee (XXXVIII, S/2001 J6)   1.0  
  Herse (L, S/2003 J17)   2.0  
  S/2003 J24   1.0  
  Chaldene (XXI, S/2000 J10)   1.9   0.04
  Kale (XXXVII, S/2001 J8)   1.0  
  Isonoe (XXVI, S/2000 J6)   1.9   0.04
  Aitne (XXXI, S/2001 J11)   1.5  
  S/2017 J5 (LXVI)   1.0  
  S/2017 J8 (LXIX)   0.5  
  Erinome (XXV, S/2000 J4)   1.6   0.04
  S/2017 J2 (LXIII)   1.0  
  S/2010 J1 (LI)   1.0  
  Taygete (XX, S/2000 J9)   2.5   0.04
  Carme (XI) 0.001 23   0.06
  S/2011 J2 (LVI)   0.5  
  Sponde (XXXVI, S/2001 J5)   1.0  
  S/2021 J6   0.5  
  S/2017 J1 (LIX)   1.0  
  Kalyke (XXIII, S/2000 J2)   2.6   0.04
  Pasiphae (VIII) 0.003 29   0.10
  Eukelade (XLVII, S/2003 J1)   2.0  
  S/2016 J4   0.5  
  Eirene (LVII, S/2003 J5)   2.0  
  Megaclite (XIX, S/2000 J8)   2.7   0.04
  Sinope (IX) 0.0008 19   0.05
  Hegemone (XXXIX, S/2003 J8)   3.0  
  Aoede (XLI, S/2003 J7)   4.0  
 
  Kallichore (XLIV, S/2003 J11)   2.0  
  Callirrhoe (XVII, S/1999 J1)   3.5   0.04
  S/2003 J9   1.0  
  Cyllene (XLVIII, S/2003 J13)   2.0  
  Kore (XLIX, S/2003 J14)   2.0  
  S/2003 J23   2.0  
 

Orbital parameters
  Semi-major
axis
(103km)		 Semi-major
axis
(Jovian Radii)		 Orbital
Period*
(days)		 Rotation
Period
(days)		 Inclination
(degrees)		 Eccentricity
   
Galilean Satellites  
  Io (I) 421.8 5.91 1.769138 S 0.04 0.004
  Europa (II) 671.1 9.40 3.551181 S 0.47 0.009
  Ganymede (III) 1070.4 14.97 7.154553 S 0.18 0.001
  Callisto (IV) 1882.7 26.33 16.689017 S 0.19 0.007
 
Lesser Satellites  
  Metis (XVI, S/1979 J3) 128.0 1.79 0.294779 S 0.02 0.001
  Adrastea (XV, S/1979 J1) 129.0 1.80 0.298260 S 0.05 0.002
  Amalthea (V) 181.4 2.54 0.498179 S 0.38 0.003
  Thebe (XIV, S/1979 J2) 221.9 3.11 0.6745 S 1.08 0.018
 
  Themisto (XVIII, S/1975 J1) 7507 105.00 130.02   43.08 0.242
 
  Leda (XIII) 11165 156.2 240.92   27.46 0.164
  Himalia (VI) 11461 160.3 250.5662 0.4 27.50 0.162
  Ersa (LXXI, S/2018 J1) 11483 160.6 252.0   30.61 0.094
  S/2018 J2 11490 160.7 252.0   29.4 0.118
  Pandia (LXV, S/2017 J4) 11525 161.2 252.1   28.15 0.180
  Lysithea (X) 11717 163.9 259.22   28.30 0.112
  Elara (VII) 11741 164.2 259.6528 0.5 26.63 0.217
  S/2011 J3 11829 165.5 263.0   28.7 0.176
  Dia (LIII, S/2000 J11) 12118 169.5 287.0   28.2 0.211
 
  S/2018 J4 16549 231.5 434.7   53.2 0.057
  Carpo (XLVI, S/2003 J20) 16989 237.6 456.1   51.4 0.430
  Valetudo (LXII, S/2016 J2) 18980 264.4 533.3   34.0 0.222
  Euporie (XXXIV, S/2001 J10) 19302 270.0 550.7R   145.8 0.144
 
  S/2003 J18 (LV) 20274 283.6 588.0R   146.4 0.105
  S/2010 J2 (LII) 20307 284.0 588.1R   150.4 0.307
  S/2003 J16 20567 287.7 598.6R   151.1 0.333
  S/2003 J2 20610 288.3 602.3R   149.2 0.278
  S/2017 J7 (LXVIII) 20627 288.5 602.6R   143.4 0.215
  S/2016 J1 (LIV) 20651 287.7 602.7R   139.8 0.141
  S/2017 J3 (LXIV) 20694 289.5 606.3R   147.9 0.148
  Orthosie (XXXV, S/2001 J9) 20721 289.8 622.6R   145.9 0.281
  S/2021 J1 20723 289.9 606.4R   149.8 0.246
  Euanthe (XXXIII, S/2001 J7) 20799 290.9 620.6R   148.9 0.232
  Thyone (XXIX, S/2001 J2) 20940 292.9 627.3R   148.5 0.229
 
  S/2022 J3 20968 293.3 617.3R   144.5 0.272
  Mneme (XL, S/2003 J21) 21069 294.7 620.0R   148.6 0.227
  Harpalyke (XXII, S/2000 J5) 21105 295.3 623.3R   148.6 0.226
  Hermippe (XXX, S/2001 J3) 21131 295.6 633.9R   150.7 0.210
  Praxidike (XXVII, S/2000 J7) 21147 295.8 625.3R   149.0 0.230
  Thelxinoe (XLII, S/2003 J22) 21162 296.0 628.1R   151.4 0.221
  S/2021 J2 21198 296.5 627.8R   150.1 0.341
  Eupheme (LX, S/2003 J3) 21200 296.5 627.8R   148.0 0.253
  Helike (XLV, S/2003 J6) 21263 297.4 634.8R   154.8 0.156
  Iocaste (XXIV, S/2000 J3) 21269 297.5 631.5R   149.4 0.216
  Ananke (XII) 21276 297.6 610.5R   148.9 0.244
  S/2017 J9 (LXX) 21487 300.6 639.2R   152.7 0.229
  S/2021 J3 21553 301.5 642.8R   150.1 0.356
  S/2003 J12 21615 302.3 646.0R   154.7 0.365
 
  S/2022 J1 22074 308.8 668.4R   165.4 0.192
  S/2003 J4 22110 309.3 668.0R   149.4 0.497
  S/2016 J3 22273 311.5 675.7R   164.1 0.236
  S/2017 J6 (LXVII) 22455 314.1 683.0R   155.2 0.557
  S/2011 J1 (LXXII) 22462 314.2 686.6R   163.3 0.233
  S/2022 J2 22473 314.3 686.7R   165.4 0.182
  S/2003 J19 (LXI) 22757 318.3 697.6R   166.7 0.257
Philophrosyne (LVIII, S/2003 J15) 22820 319.2 701.3R   143.6 0.194
  Eurydome (XXXII, S/2001 J4) 22865 319.8 717.3R   150.3 0.276
  S/2018 J3 22888 320.1 704.9R   164.9 0.273
  S/2021 J5 22893 320.2 704.9R   163.2 0.200
  S/2003 J10 22918 320.6 704.9R   163.0 0.270
  Arche (XLIII, S/2002 J1) 22931 320.7 723.9R   165.0 0.259
  S/2021 J4 22950 321.0 708.6R   164.5 0.159
 
  Autonoe (XXVIII, S/2001 J1) 23039 322.3 762.7R   152.9 0.334
  Pasithee (XXXVIII, S/2001 J6) 23096 323.1 719.5R   165.1 0.267
  Herse (L, S/2003 J17) 23097 323.1 715.4R   164.2 0.200
  S/2003 J24 23150 323.8 715.9R   162.1 0.255
  Chaldene (XXI, S/2000 J10) 23179 324.2 723.8R   165.2 0.251
  Kale (XXXVII, S/2001 J8) 23217 324.7 729.5R   165.0 0.260
  Isonoe (XXVI, S/2000 J6) 23217 324.7 725.5R   165.2 0.246
  Aitne (XXXI, S/2001 J11) 23231 324.9 730.2R   165.1 0.264
  S/2017 J5 (LXVI) 23232 325.0 719.5R   164.3 0.284
  S/2017 J8 (LXIX) 23233 325.0 719.6R   164.7 0.312
  Erinome (XXV, S/2000 J4) 23279 325.6 728.3R   164.9 0.266
  S/2017 J2 (LXIII) 23303 326.0 723.1R   166.4 0.236
  S/2010 J1 (LI) 23314 326.1 723.2R   163.2 0.320
  Taygete (XX, S/2000 J9) 23360 326.7 732.2R   165.2 0.252
  Carme (XI) 23404 327.4 702.3R   164.9 0.253
  S/2011 J2 (LVI) 23464 328.2 730.5R   148.8 0.332
  Sponde (XXXVI, S/2001 J5) 23487 328.5 748.3R   151.0 0.312
  S/2021 J6 23490 328.6 734.1R   166.5 0.363
  S/2017 J1 (LIX) 23547 329.4 734.2R   149.2 0.397
  Kalyke (XXIII, S/2000 J2) 23583 329.9 743.0R   165.2 0.245
  Pasiphae (VIII) 23624 330.4 743.6R   151.4 0.409
  Eukelade (XLVII, S/2003 J1) 23661 330.9 746.4R   165.5 0.272
  S/2016 J4 23728 331.9 743.7R   146.3 0.199
  Eirene (LVII, S/2003 J5) 23732 332.0 759.7R   163.1 0.220
  Megaclite (XIX, S/2000 J8) 23806 333.0 752.8R   152.8 0.421
  Sinope (IX) 23939 334.9 724.5R   158.1 0.250
  Hegemone (XXXIX, S/2003 J8) 23947 335.0 739.6R   155.2 0.328
  Aoede (XLI, S/2003 J7) 23981 335.4 761.5R   158.3 0.432
 
  Kallichore (XLIV, S/2003 J11) 24043 336.3 764.7R   165.5 0.264
  Callirrhoe (XVII, S/1999 J1) 24102 337.1 758.8R   147.1 0.283
  S/2003 J9 24234 339.0 766.5R   166.3 0.170
  Cyllene (XLVIII, S/2003 J13) 24349 340.6 737.8R   149.3 0.319
  Kore (XLIX, S/2003 J14) 24543 343.3 779.2R   152.4 0.325
  S/2003 J23 24750 346.2 759.7R   146.1 0.321

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

Themisto (S/1975 J1) was also designated S/2000 J1
Jovian equatorial radius used = 71,492 km

New Jupiter and Saturn Satellites Reveal New Moon Dynamical Families - Publication on discovery of new Jovian and Saturnian satellites (May 2023)
Jupiter's Known Satellites - Carnegie Institution, DTM
Jupiter back on top as "moon king" (10 February 2023)
A Dozen New Moons of Jupiter Discovered (16 July 2018)

Galilean Satellite Fact Table
Jupiter Fact Sheet
Jupiter 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