|
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:
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 |
| (136108) 2003 EL61 |
S/2005 (136108) 1
(Rudolph) |
|
~310 |
49,500 ± 400 |
49.12 |
2005 |
KBO satellite |
| (79360) 1997 CS29 |
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) |
| (82075) 2000 YW134 |
S/2005 (82075) 1 |
|
~237 |
1900 |
|
2005 |
SDO satellite |
| Neptune VII |
Larissa |
|
192
(216×204×164) |
73 500 |
0.555 |
1989 |
Inner satellite |
| 2001 QG298 |
S/2002 (2001 QG298) 1 |
|
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) |
| 2003 QY90 |
S/2003 (2003 QY90) 1 |
|
~178 |
10,000 |
|
2003 |
SDO satellite (Binary) |
| 2000 OJ67 |
S/2005 (2000 OJ67) 1 |
|
~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) |
| (136108) 2003 EL61 |
S/2005 (136108) 2 |
|
~170 |
39,300 ± 400 |
34.1 |
2005 |
KBO moon |
| Uranus XV |
Puck |
|
162 |
86,000 |
0.761833 |
1985 |
Inner satellite |
| (48639) 1995 TL8 |
S/2005 (48639) 1 |
|
~161 |
420 |
|
2005 |
SDO satellite |
| Neptune VI |
Galatea |
|
158
(204×184×144) |
62,000 |
0.429 |
1989 |
Inner satellite |
| 2001 QC298 |
S/2002 (2001 QC298) 1 |
|
~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 |
| (47171) 1999 TC36 |
S/2001 (47171) 1 |
|
~140 |
7,640 ± 460 |
|
2001 |
KBO satellite |
| (66652) 1999 RZ253 |
S/2003 (66652) 1 |
|
~137 |
4,660 ± 170 |
|
2003 |
KBO satellite (Binary) |
| Uranus XII |
Portia |
|
135 |
66,100 |
0.513196 |
1986 |
Inner satellite |
| 2000 CQ114 |
S/2004 (2000 CQ114) 1 |
|
~133 |
5,880 ± 200 |
|
2004 |
KBO satellite (Binary) |
| (80806) 2000 CM105 |
S/2005 (80806) 1 |
|
~129 |
2700 |
|
2005 |
KBO satellite |
| 88611 Teharonhiawako I |
Sawiskera |
|
~122 ± 14 |
27,300 ± 343 |
|
2002 |
KBO satellite |
| 2000 CF105 |
S/2001 (2000 CF105) 1 |
|
~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) |
| 1998 WW31 |
S/2000 (1998 WW31) 1 |
|
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) |
| 2003 UN284 |
S/2003 (2003 UN284) 1 |
|
~97 |
~60,000 |
|
2003 |
KBO satellite (Binary) |
| Uranus XI |
Juliet |
|
93 |
64 400 |
0.493065 |
1986 |
Inner satellite |
| 1999 OJ4 |
S/2005 (1999 OJ4) 1 |
|
~93 |
2,200 |
|
2005 |
KBO satellite |
| (26308) 1998 SM165 |
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) |
| 2001 QW322 |
S/2003 (2001 QW322) 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
6 to 10 km
1 to 5 km
|
|