Jovian Satellite Fact Sheet


[Montage of Jupiter and the Galilean Satellites]

Bulk parameters

                                  Mass       Radius     Mean density    Visual geometric albedo
                               (1020 kg)      (km)        (kg/m3)
Galilean Satellites
  Io (JI)                         893.2       1821.6        3530                 0.62
  Europa (JII)                    480.0       1560.8        3010                 0.68
  Ganymede (JIII)                1481.9       2631.2        1940                 0.44
  Callisto (JIV)                 1075.9       2410.3        1830                 0.19

Lesser Satellites
  Metis (JXVI, S/1979 J3)       0.001           20                               0.06
  Adrastea (JXV, S/1979 J1)     0.0002     13 x 10 x 8                           0.10
  Amalthea (JV)                 0.075     131 x 73 x 67     3100                 0.09
  Thebe (JXIV, S/1979 J2)       0.008        55 x 45                             0.05

  Themisto (JXVIII, S/1975 J1)                   4                               0.04

  Leda (JXIII)                  0.00006          5                               0.07
  Himalia (JVI)                 0.095           85                               0.03
  Lysithea (JX)                 0.0008          12                               0.06
  Elara (JVII)                  0.008           40                               0.03

  S/2000 J11                                     2.0                             0.04

  Carpo (XLVI, S/2003 J20)                       3.0
  Euporie (JXXXIV, S/2001 J10)                   1.0                                     
  Orthosie (JXXXV, S/2001 J9)                    1.0                                    
  Euanthe (JXXXIII, S/2001 J7)                   1.5                                     
  Thyone (JXXIX, S/2001 J2)                      2.0                                    
  Mneme (JXL, S/2003 J21)                        2.0
  Harpalyke (JXXII, S/2000 J5)                   2.2                             0.04
  Hermippe (JXXX, S/2001 J3)                     2.0                                    
  Praxidike (JXXVII, S/2000 J7)                  3.4                             0.04
  Thelxinoe (XLII, S/2003 J22)                   2.0
  Helike (XLV, S/2003 J6)                        4.0
  Iocaste (JXXIV, S/2000 J3)                     2.6                             0.04
  Ananke (JXII)                 0.0004          10                               0.06
 
  Herse (L, S/2003 J17)                          2.0
  Eurydome (JXXXII, S/2001 J4)                   1.5                                    
  Arche (XLIII, S/2002 J1)                       1.5
  Autonoe (JXXVIII, S/2001 J1)                   2.0                                    
  Pasithee (JXXXVIII, S/2001 J6)                 1.0                                    
  Chaldene (JXXI, S/2000 J10)                    1.9                             0.04
  Kale (JXXXVII, S/2001 J8)                      1.0                                    
  Isonoe (JXXVI, S/2000 J6)                      1.9                             0.04
  Aitne (JXXXI, S/2001 J11)                      1.5                                     
  Erinome (JXXV, S/2000 J4)                      1.6                             0.04
  Taygete (JXX, S/2000 J9)                       2.5                             0.04
  Carme (JXI)                   0.001           15                               0.06
  Sponde (JXXXVI, S/2001 J5)                     1.0                                    
  Kalyke (JXXIII, S/2000 J2)                     2.6                             0.04
  Pasiphae (JVIII)              0.003           18                               0.10
  Eukelade (XLVII, S/2003 J1)                    4.0
  Megaclite (JXIX, S/2000 J8)                    2.7                             0.04
  Sinope (JIX)                  0.0008          14                               0.05
  Hegemone (JXXXIX, S/2003 J8)                   3.0
  Aoede (XLI, S/2003 J7)                         4.0
  Kallichore (XLIV, S/2003 J11)                  2.0

  Callirrhoe (JXVII, S/1999 J1)                  4                               0.04
  Cyllene (XLVIII, S/2003 J13)                   2.0
  Kore (XLIX, S/2003 J14)                        2.0  


Recently Discovered Unnamed Satellites

                                  Mass       Radius     Mean density    Visual geometric albedo
                               (1020 kg)      (km)        (kg/m3)

  S/2003 J2                                      2.0
  S/2003 J3                                      2.0
  S/2003 J4                                      2.0
  S/2003 J5                                      4.0
  S/2003 J9                                      1.0
  S/2003 J10                                     2.0
  S/2003 J12                                     1.0
  S/2003 J15                                     2.0
  S/2003 J16                                     2.0
  S/2003 J18                                     2.0
  S/2003 J19                                     2.0
  S/2003 J23                                     2.0
  S/2010 J1                                      2.0
  S/2010 J2                                      2.0
  S/2011 J1                                      2.0
  S/2011 J2                                      2.0



Orbital parameters

                                                            Orbital   Rotation 
                                      Semimajor axis        Period*    Period    Inclination  Eccentricity
                                 (103 km)  (Jovian Radii)    (days)     (days)    (degrees)
Galilean Satellites
  Io (JI)                          421.6       5.91         1.769138      S         0.04        0.004
  Europa (JII)                     670.9       9.40         3.551181      S         0.47        0.0101
  Ganymede (JIII)                 1070.4      14.97         7.154553      S         0.21        0.0015
  Callisto (JIV)                  1882.7      26.33        16.689018      S         0.51        0.007

Lesser Satellites
  Metis (JXVI, S/1979 J3)          128.0       1.79         0.294779      S         0.06        0.0002
  Adrastea (JXV, S/1979 J1)        129.0       1.80         0.298260      S         0.03        0.0015
  Amalthea (JV)                    181.4       2.54         0.498179      S         0.40        0.003
  Thebe (JXIV, S/1979 J2)          221.9       3.11         0.6745                  0.8         0.018

  Themisto (JXVIII, S/1975 J1)    7507       105.00       130.02                   45.67        0.242

  Leda (JXIII)                   11170       156.2        240.92                   27.47        0.164
  Himalia (JVI)                  11460       160.3        250.5662       0.4       27.63        0.162
  Lysithea (JX)                  11720       163.9        259.22                   27.35        0.112
  Elara (JVII)                   11740       164.2        259.6528       0.5       24.77        0.217

  S/2000 J11                     12560       175.7        287.0                    28.2         0.248

  Carpo (XLVI, S/2003 J20)       16990       237.6        456.1                    51.4         0.430
  Euporie (JXXXIV, S/2001 J10)   19390       271.2        553.1R                  147.0         0.156      
  Orthosie (JXXXV, S/2001 J9)    20720       289.8        622.6R                  145.9         0.281      
  Euanthe (JXXXIII, S/2001 J7)   20800       290.9        620.6R                  148.9         0.232        
  Thyone (JXXIX, S/2001 J2)      20940       292.9        627.3R                  148.5         0.229       
  Mneme (JXL, S/2003 J21)        21070       294.7        620.0R                  148.6         0.227
  Harpalyke (JXXII, S/2000 J5)   21110       295.3        623.3R                  148.7         0.227
  Hermippe (JXXX, S/2001 J3)     21130       295.6        633.9R                  150.7         0.210       
  Praxidike (JXXVII, S/2000 J7)  21150       295.8        625.3R                  148.7         0.220 
  Thelxinoe (XLII, S/2003 J22)   21160       296.0        628.1R                  151.4         0.221
  Helike (XLV, S/2003 J6)        21260       297.4        634.8R                  154.8         0.156
  Iocaste (JXXIV, S/2000 J3)     21270       297.5        631.5R                  159.7         0.218
  Ananke (JXII)                  21280       297.7        629.8R                  148.9         0.244

  Eurydome (JXXXII, S/2001 J4)   22870       319.9        717.3R                  150.3         0.276       
  Arche (XLIII, S/2002 J1)       22930       320.7        723.9R                  165.0         0.259
  Autonoe (JXXVIII, S/2001 J1)   23040       322.3        762.7R                  152.9         0.334       
  Herse (L, S/2003 J17)          23097       323.1        715.4R                  164.2         0.200
  Pasithee (JXXXVIII, S/2001 J6) 23100       323.1        716.3R                  165.4         0.288       
  Chaldene (JXXI, S/2000 J10)    23180       324.2        723.8R                  165.4         0.238
  Kale (JXXXVII, S/2001 J8)      23220       324.8        729.5R                  165.0         0.260       
  Isonoe (JXXVI, S/2000 J6)      23220       324.8        725.5R                  165.0         0.261
  Aitne (JXXXI, S/2001 J11)      23230       324.9        730.2R                  165.1         0.264        
  Erinome (JXXV, S/2000 J4)      23280       325.6        728.3R                  164.9         0.270
  Taygete (JXX, S/2000 J9)       23360       326.7        732.2R                  165.2         0.251
  Carme (JXI)                    23400       327.3        734.2R                  164.9         0.253
  Sponde (JXXXVI, S/2001 J5)     23490       328.6        748.3R                  151.0         0.312     
  Kalyke (JXXIII, S/2000 J2)     23580       329.8        743.0R                  165.2         0.243
  Pasiphae (JVIII)               23620       330.4        743.6R                  151.4         0.409
  Eukelade (XLVII, S/2003 J1)    23660       330.9        746.4R                  165.5         0.272
  Megaclite (JXIX, S/2000 J8)    23810       333.0        752.8R                  152.8         0.421 
  Sinope (JIX)                   23940       334.9        758.9R                  158.1         0.250
  Hegemone (JXXXIX, S/2003 J8)   23950       335.0        739.6R                  155.2         0.328
  Aoede (XLI, S/2003 J7)         23980       335.4        761.5R                  158.3         0.432
  Kallichore (XLIV, S/2003 J11)  24040       336.3        764.7R                  165.5         0.264

  Callirrhoe (JXVII, S/1999 J1)  24100       337.1        758.8R                  147.1         0.283
  Cyllene (XLVIII, S/2003 J13)   24350       340.6        737.8R                  149.3         0.319
  Kore (XLIX, S/2003 J14)        24540       343.3        779.2R                  152.4         0.325  


Recently Discovered Unnamed Satellites

                                                          Orbital   Rotation 
                                    Semimajor axis        Period*    Period    Inclination  Eccentricity
                                (103 km)  (Jovian Radii)   (days)     (days)    (degrees)

  S/2003 J2                      28570       399.6        982.5R                  151.8         0.380
  S/2003 J3                      18340       256.5        504.0R                  143.7         0.241
  S/2003 J4                      23260       325.4        723.2R                  144.9         0.204
  S/2003 J5                      24080       336.8        759.7R                  165.0         0.210
  S/2003 J9                      22440       313.9        683.0R                  164.5         0.269
  S/2003 J10                     24250       339.2        767.0R                  164.1         0.214
  S/2003 J12                     19000       265.8        533.3R                  145.8         0.376
  S/2003 J15                     22000       307.7        668.4R                  140.8         0.110
  S/2003 J16                     21000       293.7        595.4R                  148.6         0.270
  S/2003 J18                     20700       289.5        606.3R                  146.5         0.119
  S/2003 J19                     22800       318.9        701.3R                  162.9         0.334
  S/2003 J23                     24060       336.5        759.7R                  149.2         0.309        
  S/2010 J1                      23314       326.1        723.2R                  163.2         0.320
  S/2010 J2                      20307       284.0        588.1R                  150.4         0.307
  S/2011 J1                      20155       281.9        580.7R                  162.8         0.296   
  S/2011 J2                      23330       326.3        726.8R                  151.9         0.387    

*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
S/2000 J11 had not been seen since 2000, but was recovered in 2012


 New satellites of Jupiter discovered in 2003
 New Jupiter satellite S/2002 J1 (2002)
 Eleven new Jovian moons discovered (2002)
 Eleven new Jovian moons discovered (2000)
 Jovian moon "rediscovered" after 25 years
 Jupiter's Known Satellites - Carnegie Institution, DTM

 Galilean Satellite Fact Table
 Jupiter Fact Sheet
 Jupiter Home Page
bullet Notes on the Factsheets
 Directory to other Planetary Fact Sheets


[NASA Logo]
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: 08 November 2012, DRW