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This is a partial list of Solar System objects by size, arranged in descending order of mean volumetric radius, and subdivided into several size classes. These lists can also be sorted according to an object's mass and, for the largest objects, volume, density and surface gravity, insofar as these values are available. This list contains the Sun, the planets, dwarf planets, many of the larger small Solar System bodies (which includes the asteroids), all named natural satellites, and a number of smaller objects of historical or scientific interest, such as comets and near-Earth objects.

The ordering may be different depending on whether one chooses radius or mass, because some objects are denser than others. For instance, Uranus is larger than Neptune but less massive, and although Ganymede and Titan are larger than Mercury, they have less than half Mercury's mass. This means some objects in the lower tables, despite their smaller radii, may be more massive than objects in the upper tables because they have a higher density.

Many trans-Neptunian objects (TNOs) have been discovered, and their approximate locations in this list are shown, even though there can be a large uncertainty in their measurement.

Solar System objects more massive than 1021 kilograms (one yottagram [Yg]) are known or expected to be approximately spherical. Astronomical bodies relax into rounded shapes (ellipsoids), achieving hydrostatic equilibrium, when the gravity of their mass is sufficient to overcome the structural strength of their material. Objects made of ice become round more easily than those made of rock, and many icy objects are spheroidal at far lower sizes. The cutoff boundary for roundness is somewhere between 100 km and 200 km in radius.[1]

The larger objects in the mass range between 1018 kg to 1021 kg (1 to 1000 zettagrams [Zg]), such as Tethys, Ceres, and Mimas, have relaxed to an oblate-spheroid equilibrium due to their gravity, whereas the less massive rubble piles (e.g. Amalthea and Janus) are roughly rounded, but not spherical, dubbed "irregular".

Spheroidal bodies typically have some polar flattening due to the centrifugal force from their rotation, and can sometimes even have quite different equatorial diameters (scalene ellipsoids such as Haumea). Unlike bodies such as Haumea, the irregular bodies deviate significantly from the shape of an ellipsoid.

There can be difficulty in figuring out the diameter (within a factor of about 2) for typical objects beyond Saturn. (See 2060 Chiron as an example.) For TNOs there is some confidence in the diameters, but for non-binary TNOs there is no real confidence in the masses/densities. Many TNOs are often just assumed to have Pluto's density of 2.0 g/cm3, but it is just as likely that they have a comet-like density of only 0.5 g/cm3.[2] For example, if a TNO is poorly assumed to have a mass of 3.59×1020 kg based on a radius of 350 km with a density of 2 g/cm3 and is later discovered to only have a radius of 175 km with a density of 1 g/cm3, the mass estimate would be only 2.24×1019 kg.

The sizes and masses of many of the moons of Jupiter and Saturn are fairly well known due to numerous observations and interactions of the Galileo and Cassini orbiters. But many of the moons with a radius less than ~100 km, such as Jupiter's Himalia, still have unknown masses.[3] Again, as we get further from the Sun than Saturn, things get less clear. There has not yet been an orbiter around Uranus or Neptune for long-term study of their moons. For the small outer irregular moons of Uranus, such as Sycorax, which were not discovered by the Voyager 2 flyby, even different NASA web pages, such as the National Space Science Data Center[4] and JPL Solar System Dynamics,[3] have somewhat contradictory size and albedo estimates depending on which research paper is being cited.

Data for objects has varying reliability including uncertainties in the figures for mass and radius, and irregularities in the shape and density, with accuracy often depending on how close it is to Earth or if it has been visited by a probe.

Relative sizes of the fifty largest objects in the Solar System, colored by orbital region. Values are diameters in km.
  • Relative masses of the bodies of the Solar System. Objects smaller than Saturn are not visible at this scale.
    Relative masses of the bodies of the Solar System. Objects smaller than Saturn are not visible at this scale.
  • Relative masses of the Solar planets. Jupiter at 71% of the total and Saturn at 21% dominate the system. Mercury is not visible at this scale.
    Relative masses of the Solar planets. Jupiter at 71% of the total and Saturn at 21% dominate the system. Mercury is not visible at this scale.
  • Relative masses of the solid bodies of the Solar System. Earth at 48% and Venus at 39% dominate. Bodies less massive than Pluto are not visible at this scale.
    Relative masses of the solid bodies of the Solar System. Earth at 48% and Venus at 39% dominate. Bodies less massive than Pluto are not visible at this scale.
  • Relative masses of the moons of the Solar System. Mimas, Enceladus, and Miranda are too small to be visible at this scale. Here the Moon is labeled "Luna".
    Relative masses of the moons of the Solar System. Mimas, Enceladus, and Miranda are too small to be visible at this scale. Here the Moon is labeled "Luna".

List

Objects above ≈400 km in radius

It was once thought that everything above this size is probably in hydrostatic equilibrium (HE), though some bodies listed near the end might not be if their estimated or measured size were "grossly in error" or their composition primarily rocky.[5] However, Rhea is the smallest body where detailed measurements have been made and are consistent with hydrostatic equilibrium,[6] whereas Iapetus is the largest determined not to be in hydrostatic equilibrium,[7] though it does have an ellipsoidal shape (i.e. it is round).

For simplicity and comparative purposes, the values are manually calculated assuming a sphericity of 1. The size of solid bodies does not include an object's atmosphere. For example, Titan looks bigger than Ganymede, but its solid body is smaller. For the giant planets, the "radius" is the point at which the atmosphere reaches 1 bar of atmospheric pressure.[8] The radius of Saturn's main rings is 136,775 km.

Body Image Mean radius
(km) 		Mean radius
(R⊕) 		Volume
(109 km3) 		Volume
(V⊕) 		Mass
×1021 kg
(Yg) 		Mass
(M⊕) 		Density
(g/cm3) 		Surface gravity
(m/s2) 		Surface gravity
(⊕) 		Type of object Shape Approx.
rank
Sun File:The Sun in extreme ultraviolet.jpg 696342±65[9] 109.3 1,414,300,000 1,305,700 1,988,550,000 333,000 1.408 274.0 28.02 star round (HE) 1
Jupiter 69911±6 10.97 1,431,280 1,321 1,898,600 317.83 1.326 24.79 2.535 planet (gas giant)—has rings round (HE) 2
Saturn 58232±6
(w/o rings) 		9.140 827,130 764 568,460 95.159 0.687 10.445 1.06 planet (gas giant)—has rings round (HE) 3
Uranus 25362±7 3.981 68,340 63.1 86,832 14.536 1.27 8.87 0.90 planet (ice giant)—has rings round (HE) 4
Neptune 24622±19 3.865 62,540 57.7 102,430 17.147 1.638 11.15 1.140 planet (ice giant)—has rings round (HE) 5
Earth 6371.0 1 1,083.21 1 5,973.6 1 5.514 9.78033 0.99732 planet (terrestrial) round (HE) 6
Venus 6051.8±1.0
(w/o gas) 		0.9499 928.43 0.857 4,868.5 0.815 5.243 8.872 0.905 planet (terrestrial) round (HE) 7
Mars 3389.5±0.2 0.5320 163.18 0.151 641.85 0.107 3.9335 ± 0.0004 3.7 0.38 planet (terrestrial) round (HE) 8
Ganymede
Jupiter III 		2634.1±0.3 0.4135 76.30 0.0704 148.2 0.0248 1.936 1.428 0.15 satellite of Jupiter round (HE) 9
Titan†
Saturn VI 		2576±2
(w/o gas) 		0.4043 71.52 0.0660 134.5 0.0225 1.8798 ± 0.0044 1.354 0.14 satellite of Saturn round (HE) 10
Mercury 2439.7±1.0 0.3829 60.83 0.0562 330.2 0.0553 5.427 3.7 0.38 planet (terrestrial) round (HE) 11
Callisto
Jupiter IV 		2410.3±1.5 0.3783 58.65 0.0541 107.6 0.018 1.8344 ± 0.0034 1.23603 0.126 satellite of Jupiter round (HE) 12
Io
Jupiter I 		1821.6±0.5 0.2859 25.32 0.0234 89.3 0.015 3.528 ± 0.006 1.797 0.183 satellite of Jupiter round (HE) 13
Moon
Earth I 		1737.1 0.2727 21.958 0.0203 73.5 0.0123 3.3464 1.625 0.166 satellite of Earth round (HE) 14
Europa
Jupiter II 		1560.8±0.5 0.2450 15.93 0.0147 48 0.00803 3.013 ± ∂0.005 1.316 0.134 satellite of Jupiter round (HE) 15
Triton†
Neptune I 		1353.4±0.9 0.2124 10.38 0.0096 21.5 0.00359 2.061 0.782 0.0797 satellite of Neptune round 16
PlutoR
134340 		1184±10[10] 0.186 6.95 0.0066 13.105 0.0022 2.03 ± 0.06 0.61 0.062 dwarf planet—plutino—multiple round 17
ErisR
136199 		1163±6[11] 0.1825 6.59 0.007 16.7[12] 0.0027 2.52 ± 0.05 0.659 0.0677 dwarf planet—SDO—binary round 18
Titania‡
Uranus III 		788.4±0.6 0.1238 2.06 0.0019 3.526 0.00059 1.711 ± 0.005 0.378 0.0385 satellite of Uranus round 19
Rhea‡
Saturn V 		763.8±1.0 0.1199 1.87 0.0017 2.3166 0.00039 1.236 ± 0.005 0.26 0.027 satellite of Saturn round (HE) (disputed) 20
Oberon†
Uranus IV 		761.4±2.6 0.1195 1.85 0.0017 3.014 0.0005 1.63 ± 0.05 0.347 0.035 satellite of Uranus round 21
Iapetus†
Saturn VIII 		734.5±2.8 0.1152 1.55 0.0014 1.9739 0.00033 1.088 ± 0.013 0.223 0.0227 satellite of Saturn round (not in technical HE) 22
MakemakeR
136472 		715±7 0.112 1.7 2.3 ± 0.9 dwarf planet—cubewano round 23
2007 OR10
225088 		640±105[13] 0.1005 1.0981 0.00101 resonant KBO (3:10) unknown 24
HaumeaR
136108 		620+34
−29 		0.097 1.3–1.6 0.001 4.006 0.00069 2.55[14] 0.44 0.045 dwarf planet—resonant KBO (7:12)—trinary round (scalene ellipsoid) 25
Charon†
Pluto I 		603.5±1.5 0.0947 0.87 0.0008 1.52 0.00025 1.65 ± 0.06 0.279 0.028 satellite of Pluto round 26
Umbriel†
Uranus II 		584.7±2.8 0.0918 0.84 0.0008 1.2 0.00020 1.39 ± 0.16 0.234 0.024 satellite of Uranus round 27
Ariel ‡
Uranus I 		File:Color Image of Ariel as seen from Voyager 2.jpg 578.9±0.6 0.0909 0.81 0.0008 1.35 0.00022 1.66 ± 0.15 0.269 0.027 satellite of Uranus round 28
Dione†
Saturn IV 		561.4±0.4 0.0881 0.73 0.0007 1.096 0.000183 1.478 ± 0.003 0.232 0.0236 satellite of Saturn round (not in technical HE) 29
Quaoar
50000 		555±3 0.0871 1.4 ± 0.1 0.0003 2.2 ± 0.4[15] 0.125 cubewano—binary unknown 30
Tethys‡
Saturn III 		531.1±0.6 0.0834 0.624 0.0006 0.6173 0.000103 0.984 ± 0.003[16] 0.145 0.015 satellite of Saturn round (not in technical HE) 31
SednaRA
90377 		500±80 0.0785 sednoid[17] unknown 32
Ceres‡
1 		481.5[18] 0.0736 0.433 0.0004 0.939[18] 0.000157 2.17 0.29 0.030 dwarf planet—belt asteroid round 33
2002 MS4
307261 		467±24 0.0733 cubewano[17] unknown 34
OrcusR
90482 		458±13 0.0719 2.47[19] plutino—binary unknown 35
Salacia
120347 		425±23 0.0667 0.45 ± ? 1.16+0.59
−0.36[20] 		cubewano—binary unknown 36

Objects between ≈400 and ≈200 km in radius

Most objects in this size range are expected to be round. All measured satellites except Proteus are round, though those that have their shapes carefully measured are not in technical hydrostatic equilibrium (HE). The asteroid 10 Hygiea is not, and 2 Pallas and 4 Vesta are borderline. Like the satellites, TNOs in this size range are expected to be round, assuming the estimated size is correct.

Body Image Mean radius
(km) 		Mass
×1021 kg
(Yg) 		Density

g/cm3 		Type of object Shape
2002 AW197R
55565 		380±20 cubewano unknown
2013 FY27 376 SDO unknown
2003 AZ84R
208996 		360±30 plutino—binary unknown
2002 UX25R
55637 		350±10 0.82[21] cubewano—binary unknown
Varda9
174567 		350±40 cubewano—binary unknown
2004 GV9R
90568 		340±40 cubewano unknown
Dysnomia
Eris I 		340±30 satellite of Eris unknown
2005 RN439
145452 		340±40 cubewano unknown
Varuna*
20000 		334[22] 0.37 0.992[14] cubewano unknown
IxionR
28978
325+130
−110 		plutino unknown
2007 JJ43
278361 		ca. 300 cubewano unknown
2007 UK1269
229762 		300±40 SDO unknown
Chaos
19521 		300±70 cubewano unknown
2010 KZ39 ca. 300 cubewano[23] unknown
2012 VP113 ca. 300 sednoid unknown
2010 RF43 ca. 300 SDO unknown
2005 RM439
145451 		ca. 300 SDO unknown
2001 UR1639
42301 		ca. 300 SDO[17] unknown
2002 TC302
84522 		290±50 resonant KBO (2:5) unknown
2003 UZ4139 ca. 280 plutino unknown
2008 ST291 ca. 280 SDO unknown
2010 RE64 ca. 280 SDO unknown
2010 FX86 ca. 280 cubewano unknown
2002 XV93 280±10 plutino[17] unknown
2006 QH1819 ca. 280 SDO unknown
Pallas$
2 		270±10 0.211 2.8[24] belt asteroid uncertain
2014 UM33 ca. 270 cubewano unknown
2004 XR190 ca. 270 SDO[17] unknown
Vesta$
4 		262.7±0.1[25] 0.259076±0.000001 3.456[25] belt asteroid formerly round (not in hydrostatic equilibrium:
frozen-in ellipsoidal shape and large impact basins)[26][27]
2003 VS2
84922 		260±20 plutino[17] unknown
2004 TY364*
120348 		ca. 260 cubewano unknown
2010 VK201 ca. 260 cubewano[17] unknown
2014 FT71 ca. 253 unknown
2003 QX113 ca. 250 SDO[17] unknown
2014 FC69 ca. 250
Enceladus‡
Saturn II 		252.1±0.2 0.1080±0.0001 1.609±0.005 satellite of Saturn round (not in hydrostatic equilibrium: frozen-in ellipsoidal shape)
2005 UQ5139
202421 		250±40 cubewano unknown
2010 TY53 unknown extended centaur[17] unknown
2011 GM27 unknown SDO unknown
2006 HH123 unknown unknown unknown
2010 TJ unknown SDO[17] unknown
2010 VZ98 unknown SDO[17] unknown
2011 FW62 unknown cubewano unknown
2010 EK139 240±70 SDO unknown
Miranda‡
Uranus V 		235.8±0.7 0.0659±0.0075 1.20±0.15 satellite of Uranus round
2005 TB190
145480 		230±30 detached object[17] unknown
1999 DE9
26375 		230±20 resonant KBO (2:5) unknown
2003 FY128
120132 		230±10 SDO[17] unknown
HuyaR
38628 		229±5 plutino unknown
2002 KX149
119951 		unknown cubewano unknown
2002 VR128
84719 		220±20 plutino[17] unknown
2002 WC19
119979 		unknown twotino—binary unknown
Hygiea$
10 		215±4 belt asteroid irregular
Proteus ‡
Neptune VIII (8) 		210±7 0.044 1.3[28] satellite of Neptune irregular
2005 QU1829
303775 		210±40 SDO[17] unknown
2004 NT33 210±40 cubewano[17] unknown
1999 CD158 ca. 210 resonant KBO (4:7) unknown
2004 PF115
175113 		203±43 plutino unknown
1998 SN165*
35671 		200±20 cubewano unknown
2001 QF298 200±20 plutino[17] unknown
2000 YW134*
82075 		ca. 200 SDO[17] unknown
1996 GQ21*
26181 		ca. 200 SDO[17] unknown

Selected objects between 200 and 100 km in radius

Satellites of Saturn
Satellites of Neptune
Satellites of Haumea

Objects between 200 and 100 km in radius (400 and 200 km in diameter). The largest of these may lie above the boundary for hydrostatic equilibrium, but most are irregular. Most of the trans-Neptunian objects listed with a radius smaller than 200 km have "assumed sizes based on a generic albedo of 0.09" since they are too far away to directly measure their sizes with existing instruments. Mass switches from 1021 kg to 1018 kg (Zg). Main-belt asteroids have orbital elements constrained by (2.0 AU < a < 3.2 AU; q > 1.666 AU) according to JPL Solar System Dynamics (JPLSSD).[29] This list is not complete, missing many poorly known TNOs.[17]

Body Image Mean radius
(km) 		Mass
×1018 kg
(Zg) 		Type of object Shape
Mimas‡
Saturn I 		198.2±0.4 37.49±0.03 satellite of Saturn round (smallest known body currently known to have an ellipsoidal
shape, but not in hydrostatic equilibrium)
Hiʻiaka
Haumea I 		195[30] 20 satellite of Haumea unknown
Vanth
Orcus I 		190±50[19] satellite of Orcus unknown
Ilmarë
Varda I 		180±20 satellite of Varda unknown
1996 TL66
15874 		170±10 SDO unknown
Nereid
Neptune II
170±30 satellite of Neptune irregular
2004 XA192
230965 		170±60 SDO unknown
2001 FP185
82158 		166±28 SDO unknown
Interamnia M
704 		163±1 37 belt asteroid—F-type irregular
Europa$
52 		158±4 16.5 belt asteroid—C-type irregular[31]
1995 SN55 ca. 150 Lost—centaur or transient TNO unknown
Davida$
511 		145±10 43.8 belt asteroid—C-type irregular
Sylvia$
87 		143±5 14.78 belt asteroid (outer)—X-type—trinary irregular[31]
Actaea
Salacia I 		140±10 satellite of 120347 Salacia unknown
Cybele$
65 		136±6 17.8 belt asteroid (outer)—C-type irregular
Juno$
3
136±11[32] 26.7 belt asteroid—S-type irregular[31]
Hyperion
Saturn VII
135±4 5.58 satellite of Saturn irregular
Eunomia$
15 		134±7 31.2 belt asteroid—S-type irregular[31]
Camilla$
107 		129±7 11.2 belt asteroid (outer)—C-type—binary irregular[33]
EuphrosyneM
31 		128±3 6.23 belt asteroid—C-type irregular
Psyche$
16 		127±2 21.9 belt asteroid—M-type irregular
2005 RR43
145453 		126[34] cubewano—Haumea family unknown
Chariklo
10199 		124±9 centaur unknown—has rings
2007 RW10
309239 		124±15 TNO—quasi-satellite of Neptune unknown
Sila9
79360 		125±50 11 cubewano—binary (Nunam) unknown
BambergaM
324 		117±4 10 belt asteroid—C-type
Patientia
451 		117±5 belt asteroid irregular
2001 QC298 117+11
−12[35] 		11.88±0.14 (system)[35] hot classical—binary unknown
Chiron*
2060
95P/Chiron 		116±7 centaur unknown—has rings
Thisbe $
88 		113±6 10.5 M belt asteroid—B-type irregular[33]
Hektor
624 		113±8 10 Jupiter trojan (L4)—binary irregular
Ceto
65489 		112±10 5.4[36] extended centaur—binary unknown
Herculina
532 		111±2 belt asteroid—S-type irregular[31]
Doris
48 		111±4 belt asteroid irregular
Nunam
79360 		110±50 satellite of Sila unknown
EugeniaM
45 		107 ± 2 5.69 belt asteroid—F-type—trinary irregular[31]
Phoebe $
Saturn IX
106.5±0.7 8.29±0.01 satellite of Saturn formerly round[37]
Amphitrite$
29 		106±3 11.8 belt asteroid—S-type irregular[31]
Bienor
54598 		105±15 centaur unknown
Deucalion
53311 		ca. 105 cubewano unknown
Diotima
423 		104±3 belt asteroid—C-type irregular[38]
EgeriaM
13 		104±4 16.3 belt asteroid—G-type irregular
Fortuna $
19 		104±6 12.7 belt asteroid—G-type irregular
Aurora
94 		102±2 belt asteroid irregular[39]
Iris$
7 		100±5 13.6 belt asteroid—S-type irregular
Daphne
41 		100±5 belt asteroid irregular
Themis M
24 		100±10 11.3 belt asteroid—C-type—Themis family

Selected objects between 100 and 50 km in radius

Satellites of Jupiter
Satellites of Saturn
Satellites of Uranus
Satellites of Neptune
Satellites of Haumea

Objects 100 and 50 km in radius (200 km to 100 km in average diameter). The listed objects currently include most objects in the asteroid belt and moons of the giant planets in this size range, but many newly discovered objects in the outer Solar System are missing, such as those included in the following reference.[17] Asteroid spectral types are mostly Tholen, but some might be SMASS.

Body Image Mean radius
(km) 		Mass
×1018 kg
(Zg) 		Type of object/Notes
Alauda
702 		97±2 6.05 Main-belt asteroid—C-type—binary
Larissa
Neptune VII (7)
97±3 Satellite of Neptune
Ursula
375 		96±2 Main-belt asteroid
2001 QC298 I 96+9
−10[35] 		satellite of 2001 QC298
HermioneM
121 		95 km[40] 5.38 Outer main-belt asteroid—C-type—binary
Palma
372 		96±2 Main-belt asteroid
Metis$
9 		95 ± ?? 11.3 Main-belt asteroid
Nemesis
128 		92±3 7 Main-belt asteroid—C-type
Hebe $
6 		93 ± ?? 12.8 Main-belt asteroid—S-type
Pholus
5145 		92±8 6.6 Centaur
Bertha
154 		93±1 Main-belt asteroid—C-type
Freia
76 		92±2 6.5 Outer main-belt asteroid—Cybele
ElektraM
130 		91±6 6.6 Main-belt Asteroid—G-type—binary
Rhadamanthus
38083 		40–140 Kuiper belt object
Janus$
Saturn X (10)
89.5±1.4 1.912 Satellite of Saturn
Aletheia
259 		95±3 5.97 Main-belt asteroid
Galatea
Neptune VI (6)
88±4 2.12 Satellite of Neptune
Teharonhiawako
88611 		80 ± ?? Trans-Neptunian object—cubewano—binary
Typhon
42355 		81±4 Trans-Neptunian object—binary
Lachesis
120 		87 ± ?? 5.5 Main-belt asteroid
Winchester
747 		85±3 Main-belt Asteroid
Hilda
153 		85 ± ?? 5.2 Main-belt asteroid—Hildas
Himalia M
Jupiter VI (6)
85 ± ?? 4.19 [41] Satellite of Jupiter—Himalia group
Namaka
Haumea II 		assumed ca. 85 2 Satellite of Haumea
Puck
Uranus XV (15)
81±2[42] Satellite of Uranus
Aegle
96 		84 ± 3 5.1 Main-belt asteroid
Germania
241 		89 ± 4 5.05 Main-belt asteroid—C-type
Prokne
194 		85 ± 3 5 Main-belt asteroid—C-type
Stereoskopia
566 		84[43] Outer main-belt asteroid—Cybele
Amalthea
Jupiter V (5)
84±2 2.08 ± 0.15 Satellite of Jupiter$
Agamemnon
911 		83 ± ?? Jupiter trojan
Kalliope
22 		90 ± 2 8.09M Main-belt asteroid—M-type—binary
Borasisi
66652 		70–90?[citation needed] Trans-Neptunian object—cubewano—binary
Siegena
386 		85 ± 4 Main-belt asteroid—C-type
Elpis
59 		82 ± 3 Main-belt asteroid
Diomedes
1437 		82 ± 2 4.6 Jupiter trojan
GyptisM
444 		82 ± 5 12.5 Main-belt asteroid—C-type
Aspasia
409 		88 ± 2 4.42 Main-belt asteroid—C-type
Dioretsa
20461 		unknown Centaur[44]—Damocloid
Dido
209 		70 ± 5 4.28 Main-belt asteroid—C-type
Chicago
334 		84 ± 4 Main-belt asteroid—C-type
Hispania
804 		74 ± 2 9.95 Main-belt asteroid—P-type
Eunike
185 		80 ± 3 4.09 Main-belt asteroid
Juewa
139 		81 ± 4 4 Main-belt asteroid
Io
85 		80 ± ?? 3.4 Main-belt asteroid
Loreley
165 		82 ± 4 3.91 Main-belt asteroid—C-type
Pretoria
790 		80.49[34] Outer main-belt asteroid—Cybele
Ino
173 		80 ± 3 Main-belt asteroid—C-type
Altjira 9
148780 		60–100 Trans-Neptunian object—cubewano
Eleonora
354 		77 ± 3 Main-belt asteroid—S-type
Laetitia
39 		76.9[34] 3.5 Main-belt asteroid
Irene
14 		76 ± ?? 8.2 Main-belt asteroid
Julia
89 		74 ± 4 3.6 Main-belt asteroid—S-type
Merapi
536 		76 ± 2 Main-belt asteroid
Berbericia
776 		76 ± 2 Main-belt asteroid
Adeona
145 		75 ± 3 3.6 Main-belt asteroid—Adena
Nuwa
150 		73 ± 5 3.62 Main-belt asteroid—C-type
Despina
Neptune V (5)
75±3 Satellite of Neptune
Sycorax
Uranus XVII (17) 		75 (assumed) 2.3 Satellite of Uranus
Manwë
385446 		ca. 75 Resonant KBO (4:7)
Pales M
49 		74.9[45] 2.69 Main-belt asteroid—C-type
S/2007 (148780) 1
Altjira I 		50–90 Secondary of 148780 Altjira
Lomia
117 		ca. 70 3.4 Main-belt asteroid—C-type
Hypatia
238 		ca. 70 Main-belt asteroid—C-type
Sibylla
168 		ca. 70 3.42 Main-belt asteroid—C-type
EmmaM
283 		ca. 70 1.38 Main-belt asteroid—binary
Nemausa
51 		ca. 70 Main-belt asteroid
Dione
106 		ca. 70 Main-belt asteroid—G-type
Meliboea
137 		ca. 70 3.2 Main-belt asteroid
Massalia$
20 		ca. 70 5.67 Main-belt asteroid
Isolda
211 		ca. 70 3.07 Main-belt asteroid—C-type
Äneas
1172 		ca. 70 Jupiter trojan
Vibilia
144 		ca. 70 3 Main-belt asteroid
Princetonia
508 		ca. 70 Main-belt asteroid
Helio
895 		ca. 70 Main-belt asteroid—B-type
Bononia
361 		ca. 70 Main-belt asteroid—D-type
Bertholda
420 		ca. 70 Main-belt asteroid—P-type
Minerva
93 		ca. 70 2.9 Main-belt asteroid—C-type—trinary
Patroclus
617 		ca. 70 Jupiter trojan—binary
Polyxo
308 		ca. 70 Main-belt asteroid—T-type
Melpomene
18 		ca. 70 3 Main-belt asteroid
Adorea
268 		ca. 70 Main-belt asteroid
Dembowska
349 		ca. 70 Main-belt asteroid—R-type
Comacina
489 		ca. 70 Main-belt asteroid
Hesperia
69 		ca. 70 2.76 Main-belt asteroid—M-type
Alexandra
54 		ca. 70 Main-belt asteroid
Pulcova
762 		ca. 70 Main-belt asteroid—C-type—binary
Pabu
Borasisi I 		ca. 70 Secondary of 66652 Borasisi
Philomela
196 		ca. 70 Main-belt asteroid—S-type
Medea
212 		ca. 70 2.64 Main-belt asteroid
Arethusa
95 		ca. 70 2.6 Main-belt asteroid
Portia
Uranus XII (12) 		68±4 1.7 Satellite of Uranus
Achilles
588 		ca. 70 Jupiter trojan
Wratislavia
690 		ca. 70 Main-belt asteroid
Ate
111 		ca. 70 Main-belt asteroid—C-type
Eukrate
247 		ca. 70 Main-belt asteroid—C-type
Erminia
705 		ca. 70 Main-belt asteroid
Papagena
471 		ca. 70 Main-belt asteroid—C-type
Phorcys
Ceto I 		86±5 1.67[36] Satellite of 65489 Ceto
Protogeneia
147 		ca. 70 2.5 Main-belt asteroid
Menoetius
Patroclus I 		ca. 70 Secondary of 617 Patroclus
Desiderata
344 		ca. 70 Main-belt asteroid—C-type
Lucina
146 		ca. 70 2.4 Main-belt asteroid
Lumen
141 		ca. 70 1.6 Main-belt asteroid—C-type
Liguria
356 		ca. 70 Main-belt asteroid
Parthenope
11 		ca. 70 6.15M Main-belt asteroid
Lamberta
187 		ca. 70 2.37 Main-belt asteroid—C-type
Aurelia
419 		ca. 60 Main-belt asteroid—F-type
Dynamene
200 		ca. 60 Main-belt asteroid
Flora
8 		ca. 60 8.47 Main-belt asteroid—S-type—Flora
Boliviana
712 		ca. 60 Main-belt asteroid—X-type
Zelinda
654 		ca. 60 Main-belt asteroid
Hippo
426 		ca. 60 Main-belt asteroid
Aglaja
47 		ca. 60 Main-belt asteroid—C-type
Thule
279 		ca. 60 Main-belt asteroid—D-type
Undina
92 		ca. 60 2.1 Main-belt asteroid—M-type
Anchises
1173 		ca. 60 Jupiter trojan
Odysseus
1143 		ca. 60 Jupiter trojan (L4)
Argentina
469 		ca. 60 Main-belt asteroid—Cybele
Aemilia
159 		ca. 60 1.4 Main-belt asteroid
Thia
405 		ca. 60 Main-belt asteroid—C-type
Marianna
602 		ca. 60 Main-belt asteroid
Hestia
46 		ca. 60 3.5[46]–21[47] Main-belt asteroid
Kleopatra
216 		ca. 60 Main-belt asteroid—M-type—trinary
Klymene
104 		ca. 60 2 Main-belt asteroid
Chloris
410 		ca. 60 Main-belt asteroid—C-type
Sophrosyne
134 		ca. 60 2 Main-belt asteroid
Gudrun
328 		ca. 60 1.94 Main-belt asteroid—S-type
Deiphobus
1867 		ca. 60 Jupiter trojan
Leto
68 		ca. 60 Main-belt asteroid—S-type
Panopaea
70 		ca. 60 Main-belt asteroid—C-type
Sawiskera
Teharonhiawako I 		ca. 60 Secondary of 88611 Teharonhiawako
Johanna
127 		ca. 60 Main-belt asteroid
Adelheid
276 		ca. 60 Main-belt asteroid
Iduna
176 		ca. 60 Main-belt asteroid—G-type
Xanthippe
156 		ca. 60 Main-belt asteroid—S-type
Bellona
28 		ca. 60 Main-belt asteroid—C-type
Semele
86 		ca. 60 Main-belt asteroid—C-type
Diana
78 		ca. 60 Main-belt asteroid—C-type
Myrrha
381 		ca. 60 Main-belt asteroid—C-type—
Henrietta
225 		ca. 60 1.83 Main-belt asteroid—C-type—Cybele
Elfriede
618 		ca. 60 Main-belt asteroid—C-type—
Artemis
105 		ca. 60 1.8 Main-belt asteroid—C-type
Terpsichore
81 		ca. 60 Main-belt asteroid—C-type
Astraea
5 		ca. 60 2.9 Main-belt asteroid
Galatea
74 		ca. 60 1.8 Main-belt asteroid—C-type
Ornamenta
350 		ca. 60 Main-belt asteroid—C-type
Tanete
772 		ca. 60 Main-belt asteroid—C-type
Hedwig
476 		ca. 60 Main-belt asteroid
Freda
1093 		ca. 60 Main-belt asteroid
Ophelia
171 		ca. 60 Main-belt asteroid—C-type—Themis
Ulla
909 		ca. 60 Main-belt asteroid
Paris
3317 		ca. 60 Jupiter trojan
Pompeja
203 		ca. 60 Main-belt asteroid
Makhaon
3063 		ca. 60 1.6 Jupiter trojan
2006 SQ372
308933 		ca. 60 TNO
Leda
38 		ca. 60 1.6 Main-belt asteroid
Carlova
360 		ca. 60 Main-belt asteroid—
Brixia
521 		ca. 60 Main-belt asteroid—
Veritas
490 		ca. 60 Main-belt asteroid—Veritas
Tisiphone
466 		ca. 60 Main-belt asteroid—C-type
Kalypso
53 		ca. 60 Main-belt asteroid
Alcathous
2241 		ca. 60 Jupiter trojan
Charybdis
388 		ca. 60 Main-belt asteroid—C-type
Circe
34 		ca. 60 1.5 Main-belt asteroid—C-type
Epimetheus
Saturn XI (11)
58±2 0.5304[48] Satellite of Saturn$
Scheila
596 		ca. 60 Main-belt asteroid
Melete
56 		ca. 60 1.5 Main-belt asteroid
Antigone
129 		ca. 60 2 Main-belt asteroid—nickel–iron
Victoria
12 		ca. 60 Main-belt asteroid—S-type
Mnemosyne
57 		ca. 60 Main-belt asteroid
Messalina
545 		ca. 60 Main-belt asteroid
Teucer
2797 		ca. 60 Jupiter trojan (L4)
Automedon
2920 		ca. 60 Jupiter trojan (L4)
Aegina
91 		ca. 50 1.4 Main-belt asteroid—C-type
Siwa
140 		ca. 50 1.4 Main-belt asteroid
Tauris
814 		ca. 50 Main-belt asteroid
Polyxena
595 		ca. 50 Main-belt asteroid
Athamantis
230 		ca. 50 Main-belt asteroid—S-type
Nestor
659 		ca. 50 Jupiter trojan
Fides
37 		ca. 50 1.3 Main-belt asteroid—S-type
Armida
514 		ca. 50 Main-belt asteroid
Thalia
23 		ca. 50 1.3 Main-belt asteroid—S-type
Mandeville
739 		ca. 50 Main-belt asteroid—X-type
Harmonia
40 		ca. 50 1.3 Main-belt asteroid—S-type
Eucharis
181 		ca. 50 1.2 Main-belt asteroid—K-type
Hermentaria
346 		ca. 50 Main-belt asteroid—S-type
Ninina
357 		ca. 50 Main-belt asteroid
Marion
506 		ca. 50 Main-belt asteroid—C-type
Corduba
365 		ca. 50 Main-belt asteroid—C-type
Atalante
36 		ca. 50 Main-belt asteroid
Luscinia
713 		ca. 50 Main-belt asteroid—C-type
Rollandia
1269 		ca. 50 Main-belt asteroid
Eva
164 		ca. 50 Main-belt asteroid—C-type
Ianthe
98 		ca. 50 1.2 Main-belt asteroid—C-type
Vanadis
240 		ca. 50 Main-belt asteroid—C-type
Eos
221 		ca. 50 Main-belt asteroid—K-type
Hohensteina
788 		ca. 50 Main-belt asteroid
Ani
791 		ca. 50 Main-belt asteroid
Troilus
1208 		ca. 50 Jupiter trojan
Nausikaa
192 		ca. 50 Main-belt asteroid—S-type
Ausonia
63 		ca. 50 1.1 Main-belt asteroid—S-type
Leukothea
35 		ca. 50 1.1 Main-belt asteroid—C-type
Kythera
570 		ca. 50 Main belt asteroid
Asterope
233 		ca. 50 Main belt asteroid—T-type
Euforbo
4063 		ca. 50 Jupiter trojan
Antilochus
1583 		ca. 50 Jupiter trojan
Abastumani
1390 		ca. 50 Main-belt asteroid
Helga
522 		ca. 50 Main-belt asteroid—Cybele
Andromache
175 		ca. 50 Main-belt asteroid—C-type
Kolga
191 		ca. 50 1.08 Main-belt asteroid—C-type
Gerlinde
663 		ca. 50 Main-belt asteroid
Notburga
626 		ca. 50 Main-belt asteroid
Aquitania
387 		ca. 50 Main-belt asteroid—S-type
Isis
42 		ca. 50 Main-belt asteroid—S-type
Urania
30 		ca. 50 Main-belt asteroid—S-type

Examples of objects between 50 km and 20 km in radius

There are about 589 asteroids in the asteroid belt with a measured radius between 20 and 50 km.[49] Many thousands of objects of this size range have yet to be discovered in the Trans-Neptunian region. The number of digits is not an endorsement of significant figures. The table switches from ×1018 kg to ×1015 kg (Eg), and many of these mass values are assumed. (See also: List of minor planets.)

Satellites of Jupiter
Satellites of Saturn
Satellites of Uranus
Satellites of Neptune
Satellites of Pluto
Body Image Mean radius
(km) 		Mass
×1015 kg
(Eg)
Type of object
21 Lutetia
ca. 50 1700 [50] Main-belt asteroid—M-type
50 Virginia ca. 50 Asteroid
114 Kassandra ca. 50 1000 Main-belt asteroid—T-type
1021 Flammario ca. 50 Asteroid
162 Laurentia ca. 50 Main-belt asteroid
401 Ottilia ca. 50 Main-belt asteroid
Thebe
Jupiter XIV (14)
ca. 50 Satellite of Jupiter
148 Gallia ca. 50 980 Main-belt asteroid—R-type
404 Arsinoe ca. 50 Main-belt asteroid—C-type
27 Euterpe ca. 50 Main-belt asteroid—S-type
773 Irmintraud ca. 50 Asteroid—D-type
62 Erato ca. 50 910 Main-belt asteroid—Themis
26 Proserpina ca. 45 900 Asteroid
345 Tercidina ca. 45 Main-belt asteroid—C-type
Juliet
Uranus XI 		ca. 45 Satellite of Uranus
58 Concordia ca. 45 850 Asteroid
229 Adelinda ca. 45 Main-belt asteroid—C-type
379 Huenna ca. 45 480 Main-belt asteroid—C-type
Nix
Pluto II 		ca. 45 70 Satellite of Pluto
103 Hera ca. 45 790 Asteroid
17 Thetis ca. 45 1200 Asteroid
143 Adria ca. 45 760 Main-belt asteroid
109 Felicitas ca. 45 750 Asteroid
100 Hekate ca. 45 1000 Asteroid
90 Antiope A ca. 45 410 Asteroid—C-type—binary
227 Philosophia ca. 45 Main-belt asteroid
Prometheus $
Saturn XVI (16)
ca. 45 156.6 Satellite of Saturn
110 Lydia ca. 45 670 Asteroid
Elara
Jupiter VII 		ca. 45 Satellite of Jupiter—Himalia group
72 Feronia ca. 45 670 Asteroid
Thorondor
Manwë I 		ca. 40 Satellite of Manwë
60558 Echeclus
174P/Echeclus 		ca. 40 Centaur[51]
S/2000 (90) 1 ca. 40 Asteroid moon of 90 Antiope
71 Niobe ca. 40 610 Asteroid
102 Miriam ca. 40 Asteroid
97 Klotho ca. 40 590 Asteroid
61 Danae ca. 40 Asteroid
Thalassa
Neptune IV 		ca. 40 Satellite of Neptune
122 Gerda ca. 40 570 Main-belt asteroid—S-type
Pandora$
Saturn XVII (17)
ca. 40 135.6 Satellite of Saturn
83 Beatrix ca. 40 560 Main-belt asteroid—X-type
32 Pomona ca. 40 Asteroid
Belinda
Uranus XIV (14)
ca. 40 Satellite of Uranus
115 Thyra ca. 40 Asteroid
Cressida
Uranus IX 		ca. 40 Satellite of Uranus
135 Hertha ca. 40 Asteroid
84 Klio ca. 40 520 Asteroid
80 Sappho ca. 40 Asteroid
Echidna
Typhon I 		44±3 Satellite of 42355 Typhon
1001 Gaussia ca. 40 Asteroid
58534 Logos ca. 40 270 Kuiper belt object—cubewano—binary
124 Alkeste ca. 40 470 Main-belt asteroid—S-type
55576 Amycus ca. 40 Centaur
25 Phocaea ca. 40 Asteroid
Weywot
Quaoar I 		ca. 35 Satellite of Quaoar
8405 Asbolus ca. 35 Centaur
112 Iphigenia ca. 35 Asteroid
Hydra
Pluto III 		ca. 35 Satellite of Pluto
Rosalind*
Uranus XIII (13) 		ca. 35 250 Satellite of Uranus
Caliban
Uranus XVI (16) 		ca. 35 Satellite of Uranus
99 Dike ca. 35 390 Asteroid
66 Maja ca. 35 Asteroid
116 Sirona ca. 35 Main-belt asteroid
44 Nysa ca. 35 370 Main-belt asteroid—E-type
10370 Hylonome ca. 35 Centaur
77 Frigga ca. 35 350 Asteroid
55 Pandora ca. 35 Asteroid
133 Cyrene ca. 35 310 Main-belt asteroid—S-type
79 Eurynome ca. 35 Asteroid
Zoe
Logos I 		ca. 35 Satellite of 58534 Logos
Naiad
Neptune III
ca. 35 Satellite of Neptune
43 Ariadne ca. 35 Asteroid
101 Helena ca. 35 300 Asteroid
108 Hecuba ca. 30 390 Asteroid
Desdemona
Uranus X 		ca. 30 Satellite of Uranus
Halimede*
Neptune IX 		ca. 30 Satellite of Neptune
52975 Cyllarus ca. 30 Centaur
82 Alkmene ca. 30 Asteroid
60 Echo ca. 30 Asteroid
Crantor
83982 		ca. 30 Centaur
Comet Hale–Bopp
C/1995 O1
ca. 30 Comet
Pasiphae*
Jupiter VIII 		ca. 30 Satellite of Jupiter
7066 Nessus ca. 30 Centaur
Neso
Neptune XIII (13) 		ca. 30 Satellite of Neptune
64 Angelina ca. 30 Main-belt asteroid—E-type
67 Asia ca. 30 Asteroid
119 Althaea ca. 30 200 Main-belt asteroid—S-type
75 Eurydike ca. 30 180 Main-belt asteroid—M-type
142 Polana ca. 30 180 Main-belt asteroid—F-type
253 Mathilde$
26.4 103.3 Main-belt asteroid—C-type
52872 Okyrhoe ca. 25 Centaur
Bianca
Uranus VIII 		ca. 25 92 Satellite of Uranus
Prospero
Uranus XVIII (18) 		ca. 25 85 Satellite of Uranus
Setebos
Uranus XIX (19) 		ca. 25 75 Satellite of Uranus
123 Brunhild ca. 25 Main-belt asteroid
4348 Poulydamas ca. 25 Asteroid—Jupiter Trojan
1000 Piazzia ca. 25 Main-belt asteroid
113 Amalthea ca. 25 100 Main-belt asteroid
Carme*
Jupiter XI 		ca. 25 130 Satellite of Jupiter—Carme group
138 Tolosa ca. 25 99 Main-belt asteroid—S-type
126 Velleda ca. 20 94 Main-belt asteroid
73 Klytia ca. 20 92 Asteroid
Sao
Neptune XI (11) 		ca. 20 Satellite of Neptune
125 Liberatrix ca. 20 87 Main-belt asteroid—M-type
Metis
Jupiter XVI (16)
ca. 20 36 Satellite of Jupiter
132 Aethra ca. 20 82 Main-belt asteroid—M-type
Ophelia*
Uranus VII 		ca. 20 53 Satellite of Uranus
Laomedeia
Neptune XII (12) 		ca. 20 Satellite of Neptune
118 Peitho ca. 20 76 Main-belt asteroid
208 Lacrimosa ca. 20 73.9 Main-belt asteroid—Koronis—S-type
136 Austria ca. 20 68 Main-belt asteroid—M-type
131 Vala ca. 20 69 Main-belt asteroid
Cordelia*
Uranus VI 		ca. 20 44 Satellite of Uranus
Siarnaq
Saturn XXIX (29) 		ca. 20 Satellite of Saturn

Examples of objects between 20 km and 1 km in radius

Satellites of Mars
Satellites of Jupiter
Satellites of Saturn
Satellites of Uranus
Satellites of Neptune
Satellites of Pluto
Body Image Mean
radius
(km) 		Mass
×1015 kg
(Eg)
Type of object
167 Urda ca. 20 66.7 Main-belt asteroid—Koronis—S-type
Hidalgo
944 		ca. 20 Centaur
Sinope*
Jupiter IX 		ca. 20 76 Satellite of Jupiter
Psamathe*
Neptune X 		ca. 20 37 Satellite of Neptune
29P/Schwassmann–
Wachmann 		ca. 20 Comet—centaur
Lysithea*
Jupiter X 		ca. 20 63 Satellite of Jupiter—Himalia group
158 Koronis ca. 20 Main-belt asteroid—Koronis—S-type
Helene
Saturn XII (12)
Dione B
17.6±0.4 km [52] 25 Satellite of Saturn—Dione trojan
226 Weringia ca. 15 Main-belt asteroid—S-type
433 Eros$
ca. 15 66.9 Near-Earth asteroid—Amor
Stephano
Uranus XX (20) 		ca. 15 22 Satellite of Uranus
Albiorix
Saturn XXVI (26) 		ca. 15 Satellite of Saturn
1036 Ganymed ca. 15 33 Near-Earth asteroid
1815 Beethoven ca. 15 Main-belt asteroid
243 Ida
15.7[53] 42 Main-belt asteroid—Koronis—S-type—binary
1655 Comas Solà 15.3±1.1[54] Belt asteroid—B-type
Atlas$
Saturn XV (15)
15.1±0.9 km [52] 66 Satellite of Saturn
31824 Elatus ca. 15 Centaur
Perdita
Uranus XXV (25) 		ca. 15 13 Satellite of Uranus
Pan$
Saturn XVIII (18)
14.1±1.3 km[55] 4.95[56] Satellite of Saturn
Linus
Kalliope I 		ca. 15 60[57] Moon of 22 Kalliope
Ananke
Jupiter XII (12) 		ca. 15 38.2 Satellite of Jupiter
Telesto
Saturn XIII (13) or Tethys B
ca. 10 Satellite of Saturn—Tethys trojan
Phobos$
Mars I
11.267 10.7 Satellite of Mars
Paaliaq
Saturn XX (20) 		ca. 10 8.2 Satellite of Saturn
Francisco
Uranus XXII (22) 		ca. 10 7.2 Satellite of Uranus
Calypso
Saturn XIV (14) or Tethys C
ca. 10 Satellite of Saturn—Tethys trojan
Leda
Jupiter XIII (13) 		ca. 10 11 Satellite of Jupiter—Himalia group
Ferdinand
Uranus XXIV (24) 		ca. 10 5.4 Satellite of Uranus
Margaret
Uranus XXIII (23) 		ca. 10 5.4 Satellite of Uranus
149 Medusa ca. 10 8 Main-belt asteroid
Romulus
Sylvia I 		ca. 10 4 Moon of 87 Sylvia
Ymir
Saturn XIX (19) 		ca. 10 Satellite of Saturn
Trinculo
Uranus XXI (21) 		ca. 10 3.9 Satellite of Uranus
Cupid
Uranus XXVII (27) 		ca. 10 3.8 Satellite of Uranus
S/2004 N 1 ca. 10 Satellite of Neptune
2002 Euler ca. 10 5.5 Asteroid
Adrastea
Jupiter XV (15)
ca. 10 2 Satellite of Jupiter
Kiviuq
Saturn XXIV (24) 		ca. 10 Satellite of Saturn
2000 Herschel ca. 10 Main-belt asteroid[58]
Tarvos
Saturn XXI (21) 		ca. 10 Satellite of Saturn
S/2006 (624) 1
Hektor I 		ca. 10 Moon of 624 Hektor
2685 Masursky
ca. 10 5–11 Asteroid
Comet Comas Solà 4.2[59] Jupiter-family comet
(65407) 2002 RP120 ca. 5 3.1 Damocloid (retrograde) & possible ejected SDO
Bestla
Saturn XXXIX (39) 		ca. 5 Satellite of Saturn
Kerberos
Pluto IV 		ca. 10 Satellite of Pluto
Petit-Prince
Eugenia I 		ca. 5 1.2 Moon of 45 Eugenia
Deimos$
Mars II
ca. 5 1.48 Satellite of Mars
951 Gaspra
6.1 ± 0.4 [60] 2–3 Asteroid
Ijiraq
Saturn XXII (22) 		ca. 5 Satellite of Saturn
S/2002 (121) 1
Hermione I 		ca. 5 1.6 Moon of 121 Hermione
Halley's Comet
ca. 5 0.03[61] Comet
S/2001 (107) 1
Camilla I 		ca. 5 1.5 Moon of 107 Camilla
Styx
Pluto V 		ca. 10 Satellite of Pluto
Mab
Uranus XXVI (26) 		ca. 5 Satellite of Uranus
Erriapus
Saturn XXVIII (28) 		ca. 5 Satellite of Saturn
26858 Misterrogers ca. 5 Asteroid
Callirrhoe
Jupiter XVII (17) 		ca. 5 Satellite of Jupiter
Themisto
Jupiter XVIII (18) 		ca. 5 0.69 Satellite of Jupiter
Daphnis
Saturn XXXV (35)
3.9±0.8 0.084[56] Satellite of Saturn
Remus
Sylvia II 		ca. 5 0.2 Moon of 87 Sylvia
S/2003 (379) 1
Huenna I 		ca. 5 Moon of 379 Huenna
9P/Tempel
2.8[62] 0.075 Comet
S/2003 (130) 1
Elektra I 		ca. 5 0.4 Moon of 130 Elektra
S/2004 (45) 1
Eugenia II 		ca. 5 Moon of 45 Eugenia
118401 LINEAR ca. 5 0.23 Main-belt comet
4179 Toutatis
ca. 5 0.05 Near-Earth asteroid
2867 Šteins
2.65 km[63] Asteroid—E-type
3200 Phaethon ca. 5 0.14 Asteroid—Apollo—B-type
3753 Cruithne < 5 .13 Asteroid & quasi-satellite of Earth
5535 Annefrank
< 5 Asteroid
19P/Borrelly
2.4[64] Comet (Jupiter family)
2P/Encke
< 5 Comet
C/1996 B2
Comet Hyakutake
< 5 Comet[65]
81P/Wild
Wild 2
< 5 Comet
Pallene
Saturn XXXIII (33)
< 5 0.043 Satellite of Saturn
Polydeuces
Saturn XXXIV (34)
Dione C
< 5 0.03 Satellite of Saturn—Dione trojan
17P/Holmes
< 5 Comet
Comet Churyumov–Gerasimenko
1.9 Comet
(53319) 1999 JM8
1.75[66] Asteroid
Methone
Saturn XXXII (32)
1.6 ± 0.6 0.019 Satellite of Saturn
(285263) 1998 QE2
< 5 Near-Earth asteroid—Binary
4055 Magellan
< 5 Asteroid—Amor—V-type
9969 Braille
< 5 Asteroid
132524 APL
< 5 Asteroid
(6178) 1986 DA < 5 0.002 Asteroid—Amor—M-type

Examples of objects below 1 km (1000 m) in radius

Satellites of Jupiter
Satellites of Saturn
Satellites of Uranus
Satellites of Neptune

In the asteroid belt alone there are estimated to be between 1.1 and 1.9 million objects with a radius above 0.5 km,[67] many of which are in the range 0.5–1.0 km. Countless more have a radius below 0.5 km.

Very few objects in this size range have been explored or even imaged. The exceptions are objects that have been visited by a probe, or have passed close enough to Earth to be imaged. Radius is by mean geometric radius. Number of digits not an endorsement of significant figures. Mass scale shifts from × 1015 to 1012 kg, which is 1015 grams (Petagram - Pg).

Body Image Mean
radius
(m) 		Mass
×1012 kg
Type of object
1620 Geographos
885[68] 4 Near-Earth asteroid—Apollo
1862 Apollo 850 5.1 Near-Earth asteroid—Apollo—Q-type
(214869) 2007 PA8 ≈800[69] Near-Earth asteroid—Apollo
100000 Astronautica ≈800[70] Inner main-belt asteroid[71]
Dactyl
Ida I 		700 Moon of 243 Ida
1566 Icarus 700 2.9 Near-Earth asteroid—Apollo—U-type
4769 Castalia 700[72] 1.3 Near-Earth asteroid—Apollo
(137108) 1999 AN10 650 Near-Earth asteroid—Apollo
(29075) 1950 DA
600 3 Near-Earth asteroid—Apollo
(66391) 1999 KW4
600 2.33 Mercury-crosser asteroid—Aten
46P/Wirtanen 600 Comet
103P/Hartley
Hartley 2 		570±80 0.3[73] Comet
3908 Nyx 520 5 Near-Earth asteroid—Amor—V-type
14827 Hypnos 450[74] Comet (dormant)[75]
2062 Aten 450[76] 0.76 Near-Earth asteroid—Aten
2007 CA19 432 1.2 Near-Earth asteroid—Apollo
6489 Golevka 350[77] Near-Earth asteroid—Apollo
25143 Itokawa 346 0.0358 Near-Earth asteroid—Apollo
2004 XP14 300 Near-Earth asteroid—Apollo
(144898) 2004 VD17 290 3[78] Near-Earth asteroid—Apollo
Aegaeon
Saturn LIII (53)
250 Satellite of Saturn
2005 YU55[79]
308635
180[80] Near-Earth asteroid—Apollo—PHO[81]
4660 Nereus
165[82] Near-Earth asteroid—Apollo
(357439) 2004 BL86 162.5 Near-Earth asteroid—Apollo—binary
99942 Apophis 162.5[83] 0.05[78] Near-Earth asteroid—Aten—PHO
S/2009 S 1
150 Satellite of Saturn
2010 TK7 150 Earth trojan—Apollo
2007 TU24
125[84] Near-Earth asteroid—Apollo—PHO
2002 JE9 100 NEA—Apollo—PHO
2010 XC15 100 NEA—Apollo—PHO
1994 WR12 65[85] 0.002[78] Near-Earth asteroid—Aten
2009 FD
410777 		65[86] 0.0028[86] Near-Earth asteroid—Apollo
2008 HJ [ 18 [87] 0.000005 [87] Near-Earth asteroid & fast rotator (42 s)[87]
367943 Duende
2012 DA14 		15 Near-Earth asteroid
1998 KY26 15[88] Near-Earth asteroid & fast rotator (10 m)

Currently most of the objects of mass between 109 kg to 1012 kg (less than 1000 teragrams (Tg)) listed here are near-Earth asteroids. (See also: List of NEAs by distance from Sun.) 1994 WR12 has less mass than the Great Pyramid of Giza, 5.9 × 109 kg.

For more about very small objects in the Solar System, see meteoroid, micrometeoroid, and interplanetary dust cloud. (See also Visited/imaged bodies.)

Surface gravity

The surface gravity at the equator of a body can in most cases be accurately calculated using Newton's law of universal gravitation and centrifugal force.

The gravitational acceleration at the equator is given by Newton's law of universal gravitation. The formula that follows from this law is:

where

ag is the magnitude of the gravitational acceleration
G is the gravitational constant
m is the mass of the celestial body
r is the equatorial radius of the celestial body (if this varies significantly, the mean equatorial radius is used)

The magnitude of the outward acceleration due to centrifugal force is given by

where

T is the rotation period of the celestial body

The surface gravity at the equator is then given by

Notes

† Using equatorial radius and assuming body is spherical
‡ Using three radii and assuming body is spheroid
* Radius is known only very approximately
R Radius has been determined by various methods, such as optical (Hubble), thermal (Spitzer), or direct imaging via spacecraft
9 Unknown radius, generic assumed albedo of 0.09
$ Well studied asteroid or moon whose dimensions and mass are very well known. Asteroid sizes and masses taken from James Baer's (Bio) personal website.
M Mass has been determined by perturbation. For asteroids, see James Baer's personal website.
Note: For many of the well-determined moons, radii were taken from the JPL Solar System Dynamics page.
O Radius has been determined by an occultation

References

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Further reading

External links

source: https://en.wikipedia.org/w/index.php?title=List_of_Solar_System_objects_by_size&oldid=670869454

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