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List of moons by diameter

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The tables below of natural satellites in the solar system are ordered from largest to smallest by average diameter. Satellites that are large enough for their gravity to have given them a near-spherical or ellipsoidal shape have their names in bold. Each line is marked by a color corresponding to the primary:

Moon of Earth Satellites of Mars
Asteroid moons Satellites of Jupiter
Satellites of Jupiter trojans Satellites of Saturn
Satellites of Uranus Satellites of Neptune
Satellites of Pluto and KBOs Satellites of Eris and SDOs

350 to 6000 km

Primary and numeral Name Image Diameter
(km) 		Semi-major axis
(km) 		Orbital period
(d) 		Discovery Notes
Jupiter III Ganymede 5262.4 1 070 412 +7.154 552 96 1610 Main group satellite (Galilean)
Saturn VI Titan 5150 1,221,900 +15.945 42 1655 Main group satellite
Jupiter IV Callisto 4820.6 1 882 700 +16.689 018 4 1610 Main group satellite (Galilean)
Jupiter I Io 3660.0×3637.4
×3630.6 		421 700 +1.769 137 786 1610 Main group satellite (Galilean)
Earth I Moon 3476.2 384 401 +27.321 661 55 prehistoric
Jupiter II Europa 3121.6 671 079 +3.551 181 041 1610 Main group satellite (Galilean)
Neptune I Triton 2707 354 800 -5.877 1846 Main group satellite (retrograde)
Uranus III Titania 1577.8 436 300 8.705 872 1787 Main group satellite
Saturn V Rhea 1528
(1535 × 1525 × 1526) 		527 100 +4.518 212 1672 Main group satellite
Uranus IV Oberon 1522.8 583 500 13.463239 1787 Main group satellite
Saturn VIII Iapetus 1436
(1494 × 1498 × 1425) 		3 560 800 +79.3215 1671 Main group satellite
Pluto I Charon 1207±3 19 571 ± 4 6.387230 1978
Uranus II Umbriel 1169.4 266,000 4.144177 1851 Main group satellite
Uranus I Ariel 1157.8 190,900 2.520379 1851 Main group satellite
Saturn IV Dione 1118
(1128 × 1122 × 1121) 		377,400 +2.736915 1684 Main group satellite
Saturn III Tethys 1060
(1081 × 1062 × 1055) 		294,700 +1.887802 1684 Main group satellite
Saturn II Enceladus 499
(513 × 503 × 497) 		238,100 +1.370218 1789 Main group satellite
Uranus V Miranda 471 129,900 1.413479 1948 Main group satellite
Neptune VIII Proteus 416
(436 × 416 × 402) 		117,600 1.122 1989 Inner satellite
Saturn I Mimas 397
(415 × 394 × 381) 		185,600 +0.942422 1789 Main group satellite

100 to 350 km

Primary and numeral Name Image Diameter
(km) 		Semi-major axis
(km) 		Orbital period
(d) 		Discovery Notes
Neptune II Nereid 340 5 513 400 360.14 1949 Prograde irregular
S/2005 (136108) 1
(Rudolph) 		~310 49,500 ± 400 49.12 2005 KBO satellite
S/2005 (79360) 1 ~292 2300 2005 KBO satellite (Binary)
Saturn VII Hyperion 266 1 464 100 +21.27661 1848 Main group satellite
Saturn IX Phoebe 240
(230 × 220 × 210) 		12 944 300 -545.09 1898 Retrograde irregular (Norse)
S/2005 (82075) 1 ~237 1900 2005 SDO satellite
Neptune VII Larissa 192
(216×204×164) 		73 500 0.555 1989 Inner satellite
185
(265 × 160 × 150) 		400 2002 KBO satellite (Binary)
Jupiter V Amalthea 181
(262×146×134) 		181 366 0.49817905 1892 Inner moon (Amalthea)
Saturn X Janus 178
(193 × 173 × 137) 		151,500 +0.69466 1966 Inner satellite (co-orbital)
~178 10,000 2003 SDO satellite (Binary)
~175 2300 2005 KBO satellite
Eris I Dysnomia 175±75 37,370 ± 150 15.774 2005 SDO satellite
Jupiter VI Himalia 170 11 451 971 +250.37 1904 Prograde irregular (Himalia)
S/2005 (136108) 2 ~170 39,300 ± 400 34.1 2005 KBO moon
Uranus XV Puck 162 86,000 0.761833 1985 Inner satellite
S/2005 (48639) 1 ~161 420 2005 SDO satellite
Neptune VI Galatea 158
(204×184×144) 		62,000 0.429 1989 Inner satellite
~155 3,690 ± 70 2002 KBO satellite (Binary)
Uranus XVII Sycorax ~150 12,179,000 -1288.28** 1997 Retrograde irregular
Neptune V Despina 148
(180×150×130) 		52,500 0.335 1989 Inner satellite
S/2001 (47171) 1 ~140 7,640 ± 460 2001 KBO satellite
S/2003 (66652) 1 ~137 4,660 ± 170 2003 KBO satellite (Binary)
Uranus XII Portia 135 66,100 0.513196 1986 Inner satellite
~133 5,880 ± 200 2004 KBO satellite (Binary)
S/2005 (80806) 1 ~129 2700 2005 KBO satellite
88611 Teharonhiawako I Sawiskera ~122 ± 14 27,300 ± 343 2002 KBO satellite
~120 23,000 2001 KBO satellite
Saturn XI Epimetheus 119
(135 × 108 × 105) 		151,400 +0.69433 1980 Inner satellite (co-orbital)
617 Patroclus I Menoetius 113 ± 3 680 ± 20 4.283 2001 Satellite of a Jupiter Trojan (Binary)
90 Antiope S/2000 (90) 1 110 ± 16 170 0.69 2000 Asteroid moon (Binary)
110 ± 12 22,300 ± 800 2000 KBO satellite (Binary)

60 to 100 km

Primary and numeral Name Image Diameter
(km) 		Semi-major axis
(km) 		Orbital period
(d) 		Discovery Notes
Saturn XVI Prometheus 100
(119 × 87 × 61) 		139,400 +0.61299 1980 Inner satellite (shepherd)
Jupiter XIV Thebe 98.6 ± 4 221 889 0.6745 1980 Inner satellite (Amalthea)
S/2003 1 ~97 ~60,000 2003 KBO satellite (Binary)
Uranus XI Juliet 93 64 400 0.493065 1986 Inner satellite
S/2005 1 ~93 2,200 2005 KBO satellite
S/2001 (26308) 1 ~88 11,310 ± 110 2001 KBO satellite
Pluto III Hydra 61−167 64 780 38.206 2005
Pluto II Nix 46-137 48 675 24.856 2005
Jupiter VII Elara 86 11 740 000 +261.14 1905 Prograde irregular (Himalia)
S/2003 1 ~86 ~130,000 2001 KBO moon (Binary)
Saturn XVII Pandora 84
(103 × 80 × 64) 		141,700 +0.62850 1980 Inner satellite (shepherd)
Uranus XIV Belinda 80 75,300 0.623527 1986 Inner satellite
Uranus IX Cressida 80 61,800 0.463570 1986 Inner satellite
Neptune IV Thalassa 80
(108×100×52) 		50,100 0.311 1989 Inner satellite
Uranus XVI Caliban 72 7 231 000 -579.39 1997 Retrograde irregular
Uranus XIII Rosalind 72 69,900 0.558460 1986 Inner satellite
58534 Logos I Zoe ~66 8,010 ± 80 312 2001 KBO satellite (Binary)
Uranus X Desdemona 64 62,700 0.473650 1986 Inner satellite
Neptune IX Halimede 61 15,728,000 -1879.71 2003 Retrograde irregular

30 to 60 km

Primary and numeral Name Image Diameter
(km) 		Semi-major axis
(km) 		Orbital period
(d) 		Discovery Notes
Jupiter VIII Pasiphaë 60 24 094 770 -741.09 1908 Retrograde irregular (Pasiphae)
Neptune XIII Neso 60 48,387,000 -9373.99 2003 Retrograde irregular
Neptune III Naiad 58
(96×60×52) 		48,200 0.294 1989 Inner satellite
Uranus VIII Bianca 51 59,200 0.434579 1986 Inner satellite
Uranus XVIII Prospero 50 16,256,000 -1978.29 1999 Retrograde irregular
Uranus XIX Setebos 47 17,418,000 -2125.21 1999 Retrograde irregular
Jupiter XI Carme 46 23 197 992 -721.82 1938 Retrograde irregular (Carme)
Jupiter XVI Metis 43 127 974 0.294780 1980 Inner satellite (Amalthea)
Uranus VII Ophelia 42 53,800 0.376400 1986 Inner satellite (shepherd)
Uranus VI Cordelia 40 49,800 0.335034 1986 Inner satellite (shepherd)
Neptune XII Laomedeia 40 23,571,000 3167.85 2003 Prograde irregular
Neptune XI Sao 40 22,422,000 2914.07 2003 Prograde rregular
Saturn XXIX Siarnaq 40 17 531 000 +884.88 2000 Prograde irregular (Inuit)
Neptune X Psamathe 38 46,695,000 -9115.91 2003 Retrograde irregular
Jupiter IX Sinope 38 23 540 000 -762.33 1914 Retrograde irregular (Pasiphae)
22 Kalliope I Linus 38 ± 6 1065 ± 8 3.590 2001 Asteroid moon
Jupiter X Lysithea 36 11 740 560 +259.89 1938 Prograde irregular (Himalia)
Saturn XXVI Albiorix 32 16 182 000 +774.58 2000 Prograde irregular (Gallic)
Saturn XV Atlas 32
(46 × 38 × 19) 		137,400 +0.60169 1980 Inner satellite (shepherd)
Saturn XII Helene 32
(36 × 32 × 30) 		377,400 +2.736915 1980 Main group trojan
Uranus XX Stephano 32 8,004,000 -677.37 1999 Retrograde irregular

10 to 30 km

Primary and numeral Name Image Diameter
(km) 		Semi-major axis
(km) 		Orbital period
(d) 		Discovery Notes
Jupiter XII Ananke 28 21 454 952 -642.02 1951 Retrograde irregular (Ananke)
Saturn XIII Telesto 24
(29 × 22 × 20) 		294,700 +1.887802 1980 Main group trojan
Mars I Phobos 22.2
(26.8×21×18.4) 		9,377 0.31891023 1877
Saturn XX Paaliaq 22 15 200 000 +692.98 2000 Prograde irregular (Inuit)
Jupiter XV Adrastea 26×20×16 128,690 0.29826 1979 Inner satellite (Amalthea)
Uranus XXII Francisco 22 4 276 000 -266.56 2001 Retrograde irregular
Uranus XXIV Ferdinand 21 20 901 000 -2887.21 2001 Retrograde irregular
Jupiter XIII Leda 20 11 187 781 +241.75 1974 Prograde irregular (Himalia)
Uranus XXIII Margaret 20 14 345 000 +1687.01 2003 Prograde irregular
Saturn XVIII Pan 20
(35 × 35 × 23) 		133,600 +0.57505 1990 Inner satellite (shepherd)
Uranus XXV Perdita 20 76,420 0.638 1986 Inner satellite
762 Pulcova S/2000 (762) 1 ~20 ~810 2000 Asteroid moon
Saturn XIV Calypso 19
(30 × 23 × 14) 		294,700 +1.887802 1980 Main group trojan
Uranus XXI Trinculo 18 8 504 000 -749.24 2001 Retrograde irregular
Saturn XIX Ymir 18 23 040 000 -1254.15 2000 Retrograde irregular (Norse)
87 Sylvia I Romulus 18 ± 4 1356 ± 5 3.6496 2001 Asteroid moon
Saturn XXIV Kiviuq 16 11 111 100 +448.16 2000 Prograde irregular (Inuit)
Saturn XXI Tarvos 15 17 983 000 +944.23 2000 Prograde irregular (Gallic)
45 Eugenia I Petit-Prince 12.7 ± 0.8 1184 ± 12 4.766 1998 Asteroid moon
Mars II Deimos 12.6
(15×12×10.4) 		23,460 1.264 583 1877
Saturn XXII Ijiraq 12 11 124 000 +451.77 2000 Prograde irregular (Inuit)
121 Hermione S/2002 (121) 1 12 ± 4 768 ± 11 2.582 2002 Asteroid moon
283 Emma S/2003 (283) 1 ~12 596 ± 3 2003 Asteroid moon
107 Camilla S/2001 (107) 1 11 ± 2 1235 ± 16 3.710 2001 Asteroid moon
1313 Berna S/2004 (1313) 1 ~11 ~35 2004 Asteroid moon (Binary)

6 to 10 km

Primary and numeral Name Image Diameter
(km) 		Semi-major axis
(km) 		Orbital period
(d) 		Discovery Notes
Uranus XXVII Cupid 10 74,800 0.618 2003 Inner satellite
Saturn XXVIII Erriapus ~10 17 236 900 +844.89 2000 Prograde irregular (Gallic)
Uranus XXVI Mab 10 97,734 0.923 2003 Inner satellite
Jupiter XVII Callirrhoe 9 23 214 986 -722.62 2000 Retrograde irregular (Pasiphae)
809 Lundia S/2005 (809) 1 7 − 10 15 ± 5 0.64 2005 Asteroid moon (Binary)
1089 Tama S/2003 (1089) 1 ~9 ~20 0.6852 2003 Asteroid moon (Binary)
Jupiter XVIII Themisto 8 7 393 216 +129.87 2000 Prograde irregular
Saturn XLIV Hyrrokkin ~8 18 168 300 -914.29 2006 Retrograde irregular (Norse)
Saturn XXVII Skathi ~8 15 672 500 -732.52 2000 Retrograde irregular (Norse)
Jupiter XXVII Praxidike 7 20 823 948 -613.90 2001 Retrograde irregular (Ananke)
Saturn XXXV Daphnis 6 − 8 136,505 +0.59408 2005 Inner satellite (shepherd)
Saturn LII Tarqeq ~7 17 910 600 +894.86 2007 Prograde irregular (Inuit)
Saturn XXV Mundilfari ~7 18 725 800 -956.70 2000 Retrograde irregular (Norse)
Saturn XXXI Narvi ~7 19 395 200 -1008.45 2003 Retrograde irregular (Norse)
Saturn XXIII Suttungr ~7 19 579 000 -1022.82 2000 Retrograde irregular (Norse)
Saturn XXX Thrymr ~7 20 278 100 -1078.09 2000 Retrograde irregular (Norse)
Saturn XXXIX Bestla ~7 20 570 000 -1101.45 2004 Retrograde irregular (Norse)
Saturn XLV Kari ~7 22 321 200 -1245.06 2006 Retrograde irregular (Norse)
87 Sylvia II Remus 7 ± 2 706 ± 5 1.3788 2004 Asteroid moon
379 Huenna S/2003 (379) 1 ~7 3400 ± 10 80.8 2003 Asteroid moon
1139 Atami S/2005 (1139) 1 ~7 2005 Asteroid moon (Binary)
130 Elektra S/2003 (130) 1 6 ± 2 1252 ± 30 3.92 2003 Asteroid moon
Saturn S/2007 S 2 ~6 16 560 000 -792.96 2007 Retrograde irregular (Norse)
Saturn XXXVII Bebhionn ~6 17 153 520 +838.77 2004 Prograde irregular (Inuit)
Saturn XLVII Skoll ~6 17 473 800 -862.37 2006 Retrograde irregular (Norse)
Saturn S/2004 S 13 ~6 18 056 300 -905.85 2004 Retrograde irregular (Norse)
Saturn LI Greip ~6 18 065 700 -906.56 2006 Retrograde irregular (Norse)
Saturn L Jarnsaxa ~6 18 556 900 -943.78 2006 Retrograde irregular (Norse)
Saturn S/2006 S 1 ~6 18 930 200 -972.41 2006 Retrograde irregular (Norse)
Saturn XXXVIII Bergelmir ~6 19 104 000 -985.83 2004 Retrograde irregular (Norse)
Saturn XLIII Hati ~6 19 709 300 -1033.05 2004 Retrograde irregular (Norse)
Saturn XXXVI Aegir ~6 20 482 900 -1094.46 2004 Retrograde irregular (Norse)
Saturn S/2004 S 7 ~6 20 576 700 -1101.99 2004 Retrograde irregular (Norse)
Saturn S/2006 S 3 ~6 21 076 300 -1142.37 2006 Retrograde irregular (Norse)
Saturn XLVIII Surtur ~6 22 288 916 -1242.36 2006 Retrograde irregular (Norse)
Saturn XLVI Loge ~6 22 984 322 -1300.95 2006 Retrograde irregular (Norse)
Saturn XLII Fornjot ~6 24 504 879 -1432.16 2004 Retrograde irregular (Norse)

1 to 5 km

Primary and numeral Name Image Diameter
(km) 		Semi-major axis
(km) 		Orbital period
(d) 		Discovery Notes
Jupiter XIX Megaclite 5 24 687 239 -792.44 2001 Retrograde irregular (Pasiphae)
Jupiter XX Taygete 5 22 438 648 -686.67 2001 Retrograde irregular (Carme)
Jupiter XXIII Kalyke 5 23 180 773 -721.02 2001 Retrograde irregular (Carme)
Jupiter XXIV Iocaste 5 20 722 566 -609.43 2001 Retrograde irregular (Ananke)
Saturn S/2004 S 12 ~5 19 905 900 -1048.54 2004 Retrograde irregular (Norse)
Saturn XL Farbauti ~5 19 984 800 -1054.78 2004 Retrograde irregular (Norse)
Saturn S/2007 S 3 ~5 20 518 500 ~-1100 2007 Retrograde irregular (Norse)
Jupiter S/2000 J 11 4 12 570 424 +287.93 2001 Prograde irregular
Jupiter XXVIII Autonoe 4 24 264 445 -772.17 2002 Retrograde irregular (Pasiphae)
Jupiter XLI Aoede 4 23 044 175 -714.66 2003 Retrograde irregular (Pasiphae)
Jupiter XXI Chaldene 4 22 713 444 -699.33 2001 Retrograde irregular (Carme)
Jupiter XXVI Isonoe 4 23 800 647 -750.13 2001 Retrograde irregular (Carme)
Jupiter XLVII Eukelade 4 23 483 694 -735.20 2003 Retrograde irregular (Carme)
Jupiter S/2003 J 5 4 23 973 926 -758.34 2003 Retrograde irregular (Carme)
Jupiter XXII Harpalyke 4 21 063 814 -624.54 2001 Retrograde irregular (Ananke)
Jupiter XXIX Thyone 4 21 405 570 -639.80 2002 Retrograde irregular (Ananke)
Jupiter XXX Hermippe 4 21 182 086 -629.81 2002 Retrograde irregular (Ananke?)
Jupiter XLV Helike 4 20 540 266 -601.40 2003 Retrograde irregular (Ananke)
Saturn XXXIII Pallene 4 212,280 +1.15375 2004 Main group satellite
Saturn S/2004 S 17 ~4 19 099 200 -985.45 2004 Retrograde irregular (Norse)
Saturn XLI Fenrir ~4 21 930 644 -1212.53 2004 Retrograde irregular (Norse)
1509 Esclangona S/2003 (1509) 1 ~4 ~140 2003 Asteroid moon
Saturn S/2004 S 3 ~3−5 ~140,300 ~ +0.62 2004 Inner satellite (uncertain)
Saturn S/2004 S 6 ~3−5 140,130 2004 Inner satellite (uncertain)
Saturn S/2004 S 4 ~3−5 ~140,100 2004 Inner satellite (uncertain)
Saturn XXXIV Polydeuces 3.5 377,396 +2.736915 2004 Main group trojan
Jupiter XLVI Carpo 3 17 144 873 +458.62 2003 Prograde irregular
Jupiter XXXII Eurydome 3 23 230 858 -723.36 2002 Retrograde irregular (Pasiphae?)
Jupiter XXXIX Hegemone 3 23 702 511 -745.50 2003 Retrograde irregular (Pasiphae)
Jupiter XXV Erinome 3 22 986 266 -711.96 2001 Retrograde irregular (Carme)
Jupiter XXXI Aitne 3 22 285 161 -679.64 2002 Retrograde irregular (Carme)
Jupiter XLIII Arche 3 23 717 051 -746.19 2002 Retrograde irregular (Carme)
Jupiter XXXIII Euanthe 3 20 464 854 -598.09 2002 Retrograde irregular (Ananke)
Saturn XXXII Methone 3 194,440 +1.00957 2004 Main group moon
3782 Celle S/2003 (3782) 1 ~2.5 ~30 2003 Asteroid moon
4674 Pauling S/2004 (4674) 1 ~2.5 ~250 2004 Asteroid moon
Jupiter XXXVI Sponde 2 24 252 627 -771.60 2002 Retrograde irregular (Pasiphae)
Jupiter XLVIII Cyllene 2 23 396 269 -731.10 2003 Retrograde irregular (Pasiphae)
Jupiter XLIX Kore 2 23 345 093 -776.02 2003
Jupiter S/2003 J 4 2 23 570 790 -739.29 2003 Retrograde irregular (Pasiphae)
Jupiter S/2003 J 10 2 22 730 813 -700.13 2003 Retrograde irregular (Pasiphae?)
Jupiter S/2003 J 23 2 22 739 654 -700.54 2004 Retrograde irregular (Pasiphae)
Jupiter XXXVII Kale 2 22 409 207 -685.32 2002 Retrograde irregular (Carme)
Jupiter XXXVIII Pasithee 2 23 307 318 -726.93 2002 Retrograde irregular (Carme)
Jupiter XLIV Kallichore 2 23 111 823 -717.81 2003 Retrograde irregular (Carme?)
Jupiter S/2003 J 17 2 22 134 306 -672.75 2003 Retrograde irregular (Carme)
Jupiter S/2003 J 19 2 22 709 061 -699.12 2003 Retrograde irregular (Carme)
Jupiter XXXIV Euporie 2 19 088 434 -538.78 2002 Retrograde irregular (Ananke)
Jupiter XXXV Orthosie 2 20 567 971 -602.62 2002 Retrograde irregular (Ananke)
Jupiter XL Mneme 2 21 129 786 -627.48 2003 Retrograde irregular (Ananke)
Jupiter XLII Thelxinoe 2 20 453 753 -597.61 2004 Retrograde irregular (Ananke)
Jupiter S/2003 J 3 2 19 621 780 -561.52 2003 Retrograde irregular (Ananke)
Jupiter S/2003 J 15 2 22 720 999 -699.68 2003 Retrograde irregular (Ananke?)
Jupiter S/2003 J 16 2 20 743 779 -610.36 2003 Retrograde irregular (Ananke)
Jupiter S/2003 J 18 2 19 812 577 -569.73 2003 Retrograde irregular (Ananke)
Jupiter S/2003 J 2 2 30 290 846 -1077.02 2003 Retrograde irregular
Saturn XLIX Anthe   2 197 700 +1.03650 2007 Main group satellite
5905 Johnson S/2005 (5905) 1 ~2 2005 Asteroid moon
S/2004 (17246) 1 ~2 ~230 2004 Asteroid moon
3749 Balam S/2002 (3749) 1 ~1.5 310 ± 20 ~110 2002 Asteroid moon
S/2003 (22899) 1 ~1.5 ~170 2003 Asteroid moon
243 Ida I Dactyl 1.4
(1.6 × 1.4 × 1.2) 		108 1.54 1993 Asteroid moon
3703 Volkonskaya S/2003 (3703) 1 ~1.2 2003 Asteroid moon
11264 Claudiomaccone S/2003 (11264) 1 ~1.2 0.6296 2003 Asteroid moon
(5407) 1992 AX S/2001 (5407) 1 ~1.2 6.8 2001 Asteroid moon
S/2005 (76818) 1 ~1.1 2005 Asteroid moon
Jupiter S/2003 J 9 1 23 857 808 -752.84 2003 Retrograde irregular (Carme)
Jupiter S/2003 J 12 1 17 739 539 -482.69 2003 Retrograde irregular (Ananke)




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