Properties of the planetary satellites of the solar system

compiled by Wm. Robert Johnston
last updated 8 June 2015

planetsatellitediameter/semiaxes
(see note)
densitymean distance from planetorbital periodorbital eccentricityorbital inclinationdate discovered
numbernameprovisonal des.kmkg/m3kmdaysdegrees
EarthIMoon3,477 x 3,476 x 3,4753,344384,40027.3216620.05490023.43N/A
MarsIPhobos27 x 22 x 181,8729,3760.318910230.01511.0811 AUG 1877
IIDeimos15 x 12 x 101,47123,4581.2624410.00031.7917 AUG 1877
JupiterXVIMetisS/1979 J360 x 40 x 40?128,1000.29478020.00120.0194 MAR 1979
XVAdrasteaS/1979 J120 x 16 x 14?128,9000.29826140.00180.0548 JUL 1979
VAmalthea250 x 146 x 128849181,3660.498179050.00320.379 SEP 1892
XIVThebeS/1979 J2116 x 98 x 84?221,8890.67450.01761.085 MAR 1979
IIo3,659 x 3,639 x 3,6313,528421,8001.7691380.00410.0368 JAN 1610
IIEuropa3,128 x 3,122 x 3,1223,013671,1003.5511810.00940.4668 JAN 1610
IIIGanymede5,265 x 5,264 x 5,2651,9421,070,4007.1545530.00130.1777 JAN 1610
IVCallisto4,819 x 4,818 x 4,8191,8341,882,70016.6890180.00740.1927 JAN 1610
XVIIIThemistoS/1975 J19?7,507,0001300.24243.0830 SEP 1975
XIIILeda22?11,165,000240.50.16427.4610 SEP 1974
VIHimalia180 x 150?11,461,000249.60.16227.53 NOV 1904
XLysithea42?11,717,000257.90.11228.36 JUL 1938
VIIElara80?11,741,000258.90.21726.632 JAN 1905
LIIIDiaS/2000 J114?12,118,0002870.21128.235 DEC 2000
XLVICarpoS/2003 J203?16,989,000456.10.4351.49 FEB 2003
S/2003 J32?18,339,9005040.241143.75 FEB 2003
S/2003 J121?19,002,500533.30.376145.85 FEB 2003
XXXIVEuporieS/2001 J102?19,302,000550.70.144145.811 DEC 2001
S/2011 J11?20,155,300580.70.296162.827 SEP 2011
LIIS/2010 J21?20,307,200588.10.307150.48 SEP 2010
S/2003 J182?20,700,000606.30.119146.56 FEB 2003
XXXVOrthosieS/2001 J92?20,721,000622.60.281145.911 DEC 2001
XXXIIIEuantheS/2001 J73?20,799,000620.60.232148.911 DEC 2001
XXIXThyoneS/2001 J24?20,940,000627.30.229148.511 DEC 2001
S/2003 J162?21,000,000595.40.27148.66 FEB 2003
XLMnemeS/2003 J212?21,069,0006200.227148.66 FEB 2003
XXIIHarpalykeS/2000 J54?21,105,000623.30.226148.623 NOV 2000
XXXHermippeS/2001 J34?21,131,000633.90.21150.712 DEC 2001
XXVIIPraxidikeS/2000 J77?21,147,000625.30.2314923 NOV 2000
XLIIThelxinoeS/2003 J222?21,162,000628.10.221151.49 FEB 2003
XLVHelikeS/2003 J64?21,263,000634.80.156154.86 FEB 2003
XXIVIocasteS/2000 J35?21,269,000631.50.216149.423 NOV 2000
XIIAnanke29?21,276,000626.60.244148.8929 SEP 1951
S/2003 J152?22,000,000668.40.11140.86 FEB 2003
S/2003 J91?22,441,7006830.269164.56 FEB 2003
S/2003 J192?22,800,000701.30.334162.927 FEB 2003
XXXIIEurydomeS/2001 J43?22,865,000717.30.276150.39 DEC 2001
XLIIIArcheS/2002 J13?22,931,000723.90.25916531 OCT 2002
XXVIIIAutonoeS/2001 J14?23,039,000762.70.334152.910 DEC 2001
XXXVIIIPasitheeS/2001 J62?23,096,000719.50.267165.111 DEC 2001
LHerseS/2003 J172?23,097,000715.40.2164.26 FEB 2003
XXIChaldeneS/2000 J104?23,179,000723.80.251165.226 NOV 2000
XXVIIsonoeS/2000 J64?23,217,000725.50.246165.226 NOV 2000
XXXVIIKaleS/2001 J82?23,217,000729.50.261659 DEC 2001
XXXIAitneS/2001 J113?23,231,000730.20.264165.19 DEC 2001
S/2003 J42?23,257,920723.20.204144.99 FEB 2003
XXVErinomeS/2000 J43?23,279,000728.30.266164.923 NOV 2000
LIS/2010 J12?23,314,300723.20.32163.27 SEP 2010
S/2011 J21?23,329,700726.80.387151.927 SEP 2011
XXTaygeteS/2000 J95?23,360,000732.20.252165.223 NOV 2000
XICarme47?23,404,000722.90.253164.9130 JUL 1938
XXXVISpondeS/2001 J52?23,487,000748.30.3121519 DEC 2001
XXIIIKalykeS/2000 J27?23,583,0007430.245165.225 NOV 2000
VIIIPasiphae58?23,624,000740.20.409151.4327 JAN 1908
XLVIIEukeladeS/2003 J14?23,661,000746.40.272165.55 FEB 2003
XIXMegacliteS/2000 J85?23,806,000752.80.421152.825 NOV 2000
IXSinope35?23,939,0007430.25158.1121 JUL 1914
XXXIXHegemoneS/2003 J83?23,947,000739.60.328155.28 FEB 2003
XLIAoedeS/2003 J74?23,981,000761.50.432158.35 FEB 2003
XLIVKallichoreS/2003 J112?24,043,000764.70.264165.56 FEB 2003
S/2003 J232?24,055,500759.70.309149.28 FEB 2003
S/2003 J54?24,084,200759.70.211656 FEB 2003
XVIICallirrhoeS/1999 J110?24,102,000758.80.283147.119 OCT 1999
S/2003 J102?24,249,6007670.214164.18 FEB 2003
XLVIIICylleneS/2003 J132?24,349,000737.80.319149.39 FEB 2003
XLIXKoreS/2003 J142?24,543,000779.20.3251458 FEB 2003
S/2003 J22?28,570,400982.50.38151.85 FEB 2003
SaturnS/2009 S10.3?117,0000.47140.00.016 JUL 2009
XVIIIPanS/1981 S1328420133,5840.575050730.00003480.00116 JUL 1990
XXXVDaphnisS/2005 S18340136,5050.59410.00.01 MAY 2005
XVAtlasS/1980 S2837 x 34 x 27460137,6700.601690750.00120.003OCT 1980
XVIPrometheusS/1980 S27148 x 100 x 68480139,3800.6129860.00220.008OCT 1980
XVIIPandoraS/1980 S26110 x 88 x 62490141,7200.62850.00420.05OCT 1980
XIEpimetheusS/1980 S3138 x 110 x 110640151,4100.69430.00980.35114 DEC 1976
XJanusS/1966 S2194 x 190 x 154630151,4600.69470.00680.16315 DEC 1966
LIIIAegaeonS/2008 S10.6?167,5000.8080.00.015 AUG 2008
IMimas415 x 394 x 3811,150185,5390.9424220.01961.57218 JUL 1789
XXXIIMethoneS/2004 S13?194,4401.0097140.00010.00721 JUN 2004
XLIXAntheS/2007 S42?197,7001.03510.0010.130 MAY 2007
XXXIIIPalleneS/1981 S145?212,2801.153750.0040.1811 JUN 2004
IIEnceladus513 x 503 x 4971,608238,0371.3702180.00470.00928 AUG 1789
IIITethys1,081 x 1,062 x 1,055973294,6721.8878020.00011.09121 MAR 1684
XIIITelestoS/1980 S1330 x 25 x 15?294,7101.8878020.00021.188 APR 1980
XIVCalypsoS/1980 S2530 x 16 x 16?294,7101.8878020.00051.49913 MAR 1980
XXXIVPolydeucesS/2004 S53?377,2002.73690.01920.177421 OCT 2004
IVDione1,128 x 1,122 x 1,1211,476377,4152.7369150.00220.02821 MAR 1684
XIIHeleneS/1980 S635?377,4202.73690.00710.2131 MAR 1980
VRhea1,534 x 1,525 x 1,5261,233527,0684.5175000.0010.33123 DEC 1672
VITitan5,1511,8821,221,86515.9454210.02880.3125 MAR 1655
VIIHyperion328 x 260 x 2145441,500,93421.2766090.0230.6216 SEP 1848
VIIIIapetus1,495 x 1,495 x 1,4251,0833,560,85179.3301830.02838.3125 OCT 1671
XXIVKiviuqS/2000 S516?11,111,000449.20.33445.717 AUG 2000
XXIIIjiraqS/2000 S612?11,124,000451.40.31646.4423 SEP 2000
IXPhoebe217 x 215 x 2031,63812,947,913549.60.163175.2416 AUG 1898
XXPaaliaqS/2000 S222?15,200,000686.90.36445.137 AUG 2000
XXVIISkathiS/2000 S88?15,541,000728.20.27152.623 SEP 2000
XXVIAlbiorixS/2000 S1129?16,182,000783.50.47833.989 NOV 2000
S/2007 S26?16,560,0008000.218176.730 MAY 2007
XXXVIIBebhionnS/2004 S116?17,119,000834.80.46935.0112 DEC 2004
XXVIIIErriapusS/2000 S1010?17,343,000871.20.47434.6223 SEP 2000
XXIXSiarnaqS/2000 S339?17,531,000895.60.29545.5623 SEP 2000
XLVIISkollS/2006 S86?17,665,000878.30.464161.25 JAN 2006
XXITarvosS/2000 S415?17,983,000926.20.53133.8223 SEP 2000
LIITarqeqS/2007 S17?18,009,000887.50.1646.0930 MAY 2007
LIGreipS/2006 S46?18,206,000921.20.326179.85 JAN 2006
XLIVHyrokkinS/2004 S198?18,437,000931.80.333151.412 DEC 2004
S/2004 S136?18,450,0009060.273167.412 DEC 2004
S/2004 S174?18,600,0009860.259166.613 DEC 2004
XXVMundilfariS/2000 S97?18,685,000952.60.21167.323 SEP 2000
LJarnsaxaS/2006 S66?18,811,000964.70.216163.35 JAN 2006
S/2006 S16?18,981,1009700.13154.24 JAN 2006
XXXINarviS/2003 S17?19,007,0001,003.90.431145.85 FEB 2003
XXXVIIIBergelmirS/2004 S156?19,338,0001,005.90.142158.512 DEC 2004
XXIIISuttungrS/2000 S127?19,459,0001,016.70.114175.823 SEP 2000
S/2004 S125?19,650,0001,0480.40116412 DEC 2004
S/2004 S76?19,800,0001,1030.58165.112 DEC 2004
XLIIIHatiS/2004 S146?19,856,0001,038.70.372165.812 DEC 2004
XXXIXBestlaS/2004 S187?20,129,0001,083.60.521145.213 DEC 2004
XLFarbautiS/2004 S95?20,390,0001,086.10.206156.412 DEC 2004
XXXThrymrS/2000 S77?20,474,0001,094.30.4717623 SEP 2000
S/2007 S34?20,518,5001,1000.13177.230 MAY 2007
XXXVIAegirS/2004 S106?20,735,0001,116.50.252166.712 DEC 2004
S/2006 S35?21,132,0001,1420.471150.85 JAN 2006
XLVKariS/2006 S27?22,118,0001,233.60.478156.34 JAN 2006
XLIFenrirS/2004 S164?22,453,0001,260.30.136164.913 DEC 2004
XLVIIISurturS/2006 S76?22,707,0001,297.70.451177.55 JAN 2006
XIXYmirS/2000 S118?23,040,0001,315.40.335173.17 AUG 2000
XLVILogeS/2006 S56?23,065,0001,3120.187167.95 JAN 2006
XLIIFornjotS/2004 S86?25,108,0001,490.90.206170.412 DEC 2004
UranusVICordeliaS/1986 U740?49,8000.3350330.00030.08520 JAN 1986
VIIOpheliaS/1986 U843?53,8000.3764040.00990.10420 JAN 1986
VIIIBiancaS/1986 U951?59,1660.4345770.00090.1823 JAN 1986
IXCressidaS/1986 U380?61,7670.463570.00040.049 JAN 1986
XDesdemonaS/1986 U664?62,6590.4736510.00010.113 JAN 1986
XIJulietS/1986 U294?64,3580.4930660.00070.053 JAN 1986
XIIPortiaS/1986 U2135?66,0970.5131960.00010.033 JAN 1986
XIIIRosalindS/1986 U472?69,9260.5584590.00010.0913 JAN 1986
XXVIICupidS/2003 U210?74,3920.6180.0010.125 AUG 2003
XIVBelindaS/1986 U581?75,2560.6235250.00010.03113 JAN 1986
XXVPerditaS/1986 U1020?76,4170.6380180.0030.0718 JAN 1986
XVPuckS/1985 U1162?86,0040.7618320.00010.31930 DEC 1985
XXVIMabS/2003 U110?97,7360.92290.0030.1325 AUG 2003
VMiranda481 x 468 x 4661,214129,9001.4134790.00184.34116 FEB 1948
IAriel1,162 x 1,156 x 1,1561,592190,9002.5203790.00120.04224 OCT 1851
IIUmbriel1,1691,459266,0004.14417720.0040.13324 OCT 1851
IIITitania1,5781,662436,3008.7058720.00120.0811 JAN 1787
IVOberon1,5231,559583,50013.4632390.00130.06911 JAN 1787
XXIIFranciscoS/2001 U322?4,282,900266.60.132147.2513 AUG 2001
XVICalibanS/1997 U172?7,231,100579.70.181141.536 SEP 1997
XXStephanoS/1999 U332?8,007,400677.40.225143.8218 JUL 1999
XXITrinculoS/2001 U110?8,505,2007590.219166.9713 AUG 2001
XVIISycoraxS/1997 U2150?12,179,4001,288.300.522159.426 SEP 1997
XXIIIMargaretS/2003 U320?14,146,7001,694.800.67757.3729 AUG 2003
XVIIIProsperoS/1999 U250?16,276,8001,977.300.445151.8318 JUL 1999
XIXSetebosS/1999 U130?17,420,4002,234.800.591158.2418 JUL 1999
XXIVFerdinandS/2001 U221?20,901,0002,823.400.368169.7913 AUG 2001
NeptuneIIINaiadS/1989 N666?48,2270.29439560.0003284.7382AUG 1989
IVThalassaS/1989 N582?50,0750.31148460.0001560.2054AUG 1989
VDespinaS/1989 N3176?52,5260.42874510.000120.07JUL 1989
VIGalateaS/1989 N4148?61,9530.33465520.0001390.05JUL 1989
VIILarissaS/1989 N2208 x 178?73,5480.55465380.0013860.2008JUL 1989
S/2004 N118?105,3000.9360.00.0JUL 2013
VIIIProteusS/1981 N1436 x 416 x 402?117,6471.1223160.0004380.0392JUN 1989
ITriton2,7072,059354,7595.8768540.000016156.8710 OCT 1846
IINereid340?5,513,818360.60.75017.091 MAY 1949
IXHalimedeS/2002 N162?15,728,0001,879.70.571134.114 AUG 2002
XISaoS/2002 N244?22,422,0002,914.10.29348.5114 AUG 2002
XIILaomedeiaS/2002 N342?23,571,0003,167.90.42434.7413 AUG 2002
XPsamatheS/2003 N140?46,695,0009,115.90.45137.429 AUG 2003
XIIINesoS/2002 N460?48,387,0009,3740.495132.614 AUG 2002
PlutoICharonS/1978 P11,2091,72019,5736.3872270.00000.0013 APR 1978
VStyxS/2012 (134340) 118?42,49020.16170.00340.0826 JUN 2012
IINixS/2005 P293<168048,84024.854940.00230.115 MAY 2005
IVKerberosS/2011 (134340) 129?57,73032.168020.00310.42628 JUN 2011
IIIHydraS/2005 P1115<88064,74038.201690.00660.30415 MAY 2005
HaumeaIINamakaS/2005 (2003 EL61) 2160?25,66018.27830.24913.4126 JAN 2005
IHi'iakaS/2005 (2003 EL61) 1320?49,88049.4620.0510.030 JUN 2005
ErisIDysnomiaS/2005 (UB313) 1510?37,60015.790.017?10 SEP 2005

Note: for satellites with measurably non-spherical shapes, "diameter/semiaxes" column gives semiaxes of the best fit triaxial ellipsoid.

© 2001-2013, 2015 by Wm. Robert Johnston.
Last modified 8 June 2015.
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