List of Solar System objects by size

This article includes a list of the most massive known objects of the Solar System and partial lists of smaller objects by observed mean radius. These lists can be sorted according to an object's radius and mass and, for the most massive objects, volume, density, and surface gravity, if these values are available.

These lists contain 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.

Many trans-Neptunian objects (TNOs) have been discovered; in many cases their positions in this list are approximate, as there is frequently a large uncertainty in their estimated diameters due to their distance from Earth. There are uncertainties in the figures for mass and radius, and irregularities in the shape and density, with accuracy often depending on how close the object is to Earth or whether it has been visited by a probe.

Solar System objects more massive than 1021 kilograms are known or expected to be approximately spherical. Astronomical bodies relax into rounded shapes (spheroids), achieving hydrostatic equilibrium, when their own gravity is sufficient to overcome the structural strength of their material. It was believed that the cutoff for round objects is somewhere between 100 km and 200 km in radius if they have a large amount of ice in their makeup; however, later studies revealed that icy satellites as large as Iapetus (1,470 kilometers in diameter) are not in hydrostatic equilibrium at this time, and a 2019 assessment suggests that many TNOs in the size range of 400–1,000 kilometers may not even be fully solid bodies, much less gravitationally rounded. Objects that are ellipsoids due to their own gravity are here generally referred to as being "round", whether or not they are actually in equilibrium today, while objects that are clearly not ellipsoidal are referred to as being "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 have a significantly non-ellipsoidal profile, often with sharp edges.

There can be difficulty in determining the diameter (within a factor of about 2) for typical objects beyond Saturn (see: 2060 Chiron § Physical characteristics, for 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.

For example, if a TNO is incorrectly assumed to have a mass of 3.59×1020 kg based on a radius of 350 km with a density of 2 g/cm3 but is later discovered to have a radius of only 175 km with a density of 0.5 g/cm3, its true mass would be only 1.12×1019 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; however, many of the moons with a radius less than ≈100 km, such as Jupiter's Himalia, have far more uncertain masses. Further out from Saturn, the sizes and masses of objects are 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 and JPL Solar System Dynamics, give somewhat contradictory size and albedo estimates depending on which research paper is being cited.

Graphical overview

Objects with radii over 400 km

The following objects have a nominal mean radius of 400 km or greater. It was once expected that any icy body larger than approximately 200 km in radius was likely to be in hydrostatic equilibrium (HE). However, Ceres (r = 470 km) is the smallest body for which detailed measurements are consistent with hydrostatic equilibrium, whereas Iapetus (r = 735 km) is the largest icy body that has been found to not be in hydrostatic equilibrium. The known icy moons in this range are all ellipsoidal (except Proteus), but trans-Neptunian objects up to 450–500 km radius may be quite porous.

For simplicity and comparative purposes, the values are manually calculated assuming that the bodies are all spheres. 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 defined as the distance from the center at which the atmosphere reaches 1 bar of atmospheric pressure.

Because Sedna has no known moons, directly determining its mass (estimated to be from 1.7x1021 to 6.1×1021 kg) is impossible without sending a probe.

Body Image Radius Volume Mass Surface area Density Gravity Type Discovery
(km) (R🜨) (109 km3) (V🜨) (1021 kg) (M🜨) (106 km2) 🜨 (g/cm3) (m/s2) (🜨)
Sun 695700 ± ? 109.2 1,409,300,000 1,301,000 1988475000±92000 333,000 6,078,700 11,918 1.409 274.0 27.94 G2V-class star prehistoric
Jupiter 69886±0.4 10.97 1,431,280 1,321 1898125±88 317.83 61,419 120.41 1.3262±0.0003 24.79 2.528 gas giant planet; has rings prehistoric
Saturn 58232±6
(136775 for A Ring)
9.140 827,130 764 568317±26 95.162 42,612 83.54 0.6871±0.0002 10.44 1.065 gas giant planet; has rings prehistoric
Uranus 25362±7 3.981 68,340 63.1 86809.9±4.0 14.536 8083.1 15.85 1.270±0.001 8.69 0.886 ice giant planet; has rings 1781
Neptune 24622±19 3.865 62,540 57.7 102409.2±4.8 17.147 7618.3 14.94 1.638±0.004 11.15 1.137 ice giant planet; has rings 1846
Earth 6371.0084±0.0001 1 1,083.21 1 5972.17±0.28 1 510.06447 1 5.5134±0.0003 9.81 1 terrestrial planet prehistoric
Venus 6051.8±1.0 0.9499 928.43 0.857 4867.31±0.23 0.815 460.2 0.903 5.243±0.003 8.87 0.905 terrestrial planet prehistoric
Mars 3389.5±0.2 0.5320 163.18 0.151 641.691±0.030 0.107 144.37 0.283 3.9340±0.0007 3.71 0.379 terrestrial planet prehistoric
Ganymede
Jupiter III
2634.1±0.3 0.4135 76.30 0.0704 148.19 0.0248 86.999 0.171 1.936 1.428 0.146 moon of Jupiter (icy) 1610
Titan
Saturn VI
2574.73±0.09 0.4037 71.50 0.0658 134.518 0.0225 83.3054 0.163 1.880±0.004 1.354 0.138 moon of Saturn (icy) 1655
Mercury 2439.4±0.1 0.3829 60.83 0.0562 330.103±0.021 0.0553 74.797 0.147 5.4289±0.0007 3.70 0.377 terrestrial planet prehistoric
Callisto
Jupiter IV
2410.3±1.5 0.3783 58.65 0.0541 107.594 0.018 73.005 0.143 1.834±0.003 1.23603 0.126 moon of Jupiter (icy) 1610
Io
Jupiter I
1821.6±0.5 0.2859 25.32 0.0234 89.32 0.015 41.698 0.082 3.528±0.006 1.797 0.183 moon of Jupiter (terrestrial) 1610
Moon
Earth I
1737.4±0.1 0.2727 21.958 0.0203 73.46 0.0123 37.937 0.074 3.344±0.005 1.625 0.166 moon of Earth (terrestrial) prehistoric
Europa
Jupiter II
1560.8±0.5 0.2450 15.93 0.0147 48.00 0.008035 30.613 0.06 3.013±0.005 1.316 0.134 moon of Jupiter (terrestrial) 1610
Triton
Neptune I
1353.4±0.9 0.2124 10.38 0.0096 21.39±0.03 0.003599 23.018 0.045 2.061 0.782 0.0797 moon of Neptune (icy) 1846
Pluto
134340
1188.3±0.8 0.187 7.057 0.00651 13.03±0.03 0.0022 17.79 0.034 1.853±0.004 0.620 0.063 dwarf planet; plutino; multiple 1930
Eris
136199
1163±6 0.1825 6.59 0.0061 16.38±0.2 0.0028 17 0.033 2.43±0.05 0.824 0.083 dwarf planet; SDO; binary 2003
Haumea
136108
798±6 to 816 0.12 1.98 0.0018 3.95244+0.01109
−0.01103
0.00066 8.14 0.016 2.018 0.401 0.0409 dwarf planet;
resonant KBO (7:12);
trinary; has rings
2004
Titania
Uranus III
788.4±0.6 0.1237 2.06 0.0019 3.4550±0.0509 0.00059 7.82 0.015 1.683 0.378 0.0385 moon of Uranus 1787
Rhea
Saturn V
763.5±0.5 0.1199 1.87 0.0017 2.307 0.00039 7.34 0.014 1.2372±0.0029 0.26 0.027 moon of Saturn 1672
Oberon
Uranus IV
761.4±2.6 0.1195 1.85 0.0017 3.1104±0.0749 0.0005 7.285 0.014 1.682 0.347 0.035 moon of Uranus 1787
Iapetus
Saturn VIII
734.4±2.8 0.1153 1.66 0.0015 1.806 0.00033 6.8 0.013 1.0887±0.0127 0.223 0.0227 moon of Saturn 1671
Makemake
136472
715+19
−11
0.112 1.53 0.0014 2.69±0.20 0.00045 6.4 0.013 1.67±0.17 0.35 0.0357 dwarf planet; cubewano 2005
Gonggong
225088
615±25 0.0983 1.03 0.0009 1.75±0.07 0.00029 4.753 0.009 1.74±0.16 0.3 0.0306 dwarf planet; resonant SDO (3:10) 2007
Charon
Pluto I
606.0±0.5 0.0951 0.932 0.0009 1.5897±0.0045
0.00025 4.578 0.009 1.705±0.006 0.288 0.0294 moon of Pluto 1978
Umbriel
Uranus II
584.7±2.8 0.0918 0.837 0.0008 1.2885±0.0225 0.00020 4.3 0.008 1.539 0.234 0.024 moon of Uranus 1851
Ariel
Uranus I
578.9±0.6 0.0909 0.813 0.0007 1.2331±0.0180 0.000226 4.211 0.008 1.517 0.269 0.027 moon of Uranus 1851
Dione
Saturn IV
561.4±0.4 0.0881 0.741 0.0007 1.0954868±0.0000246 0.000183 3.965 0.008 1.478±0.003 0.232 0.0237 moon of Saturn 1684
Quaoar
50000
548.8±1.1 0.0879 0.737 0.0007 1.212±0.005 0.0002 3.83 0.008 1.751±0.013 0.3 0.0306 dwarf planet; cubewano; binary; has rings 2002
Tethys
Saturn III
531.1±0.6 0.0834 0.624 0.0006 0.617 0.000103 3.57 0.007 0.984±0.003 0.145 0.015 moon of Saturn 1684
Ceres
1
469.7±0.1 0.0742 0.433 0.0004 0.938392±0.000005 0.000157 2.85 0.006 2.1616±0.0025 0.28 0.029 dwarf planet; belt asteroid 1801
Orcus
90482
455+25
−20
0.0719 0.404 0.0004 0.548±0.010 0.000092 1.4±0.2 0.2 0.0204 dwarf planet; plutino; binary 2004
Sedna
90377
453+157
−129
0.0785 0.516 0.0005 dwarf planet; sednoid; detached object 2003
Salacia
120347
419±22 0.0664 0.373 0.0003 0.4861+0.0076
−0.0074
0.000082 1.5±0.1 0.165 0.0168 cubewano; binary 2004
  star    giant planet    terrestrial planet    presumed dwarf planet    moon of Earth    moon of Jupiter    moon of Saturn    moon of Uranus    moon of Neptune    moon of Pluto

Smaller objects by mean radius

From 200 to 399 km

All imaged icy moons with radii greater than 200 km except Proteus are clearly round, although those under 400 km that have had their shapes carefully measured are not in hydrostatic equilibrium. The known densities of TNOs in this size range are remarkably low (1–1.2 g/cm3), implying that the objects retain significant internal porosity from their formation and were never gravitationally compressed into fully solid bodies. Many intrinsically bright TNOs like 2018 VG18 and 2017 OF201 do not have directly measured sizes (e.g. via stellar occultation and radiometry of thermal emission), so their sizes are estimated based on an assumed albedo. In the list below, TNOs with unmeasured sizes are only listed if they have been mentioned in press releases and the scientific literature.

Body Image Radius
(km)
Mass
(1018 kg)
Density
(g/cm3)
Type Refs
r · M
Máni
307261
398±12 cubewano
Achlys
208996
386±6 (area equivalent) ≈ 200 0.87±0.01 (assuming HE) plutino; binary
Aya
55565
384±19.5 cubewano
2010 JO179
574372
≈ 375±75 SDO
Chiminigagua
532037
371+39
−41.5
SDO; binary
Varda
174567
370±7 244±6 1.23±0.04 cubewano; binary  ·
2017 OF201 ≈ 350 eTNO
Ixion
28978
348.390+5.375
−4.435
(area equivalent)
plutino
2021 DR15 345±80 SDO
Goibniu
90568
340±17 cubewano
Ritona
145452
339.5+27.5
−36.5
cubewano
2015 RR245
523794
≈ 335 resonant KBO (2:9)
Uni
55637
329.5±19 125±3 0.82±0.11 cubewano; binary  ·
Varuna
20000
327+77
−51
≈ 160 0.992+0.086
−0.015
cubewano
2003 UZ413
455502
325+0.5
−87.5
≈ 300 2.64 plutino
Rumina
145451
≈ 322 SDO
Gǃkúnǁʼhòmdímà
229762
321±14 136.1±3.3 1.04±0.17 SDO; binary  ·
2014 UZ224 (DeeDee) 317.5+28.5
−30.5
SDO
2008 OG19
470599
309.5+28
−56.5
0.609±0.004 SDO  ·
Dysnomia
Eris I
307.5+60
−50
82±57 0.7±0.5 moon of Eris
2007 JJ43
278361
305+85
−70
cubewano
2004 XR190 (Buffy)
612911
300±85 SDO
2005 QU182
303775
292+77.5
−72
SDO
2014 EZ51
523692
> 288 SDO
Xewioso
78799
283+36
−37
cubewano
2002 XV93
612533
275+11
−12
plutino
Vesta
4
262.7±0.1 259.0271±0.0058 3.456±0.035 belt asteroid type V  ·
2003 VS2
84922
262±4 plutino
Pallas
2
256±2 204±3 2.92±0.08 belt asteroid type B
2004 TY364
120348
256+19
−20
cubewano
Enceladus
Saturn II
252.1±0.2 108.0±0.1 1.609±0.005 moon of Saturn  ·
2002 TC302
84522
250±7 resonant SDO (2:5)
2018 VG18 (Farout) ≈ 250 resonant SDO (2:9)
2005 UQ513
202421
249+32
−38
cubewano
Miranda
Uranus V
235.8±0.7 62.93±3.00 1.148 moon of Uranus  ·
Dziewanna
471143
235+18
−5
SDO
2005 TB190
145480
232±31 detached object
1999 DE9
26375
231±23 resonant SDO (2:5)
2003 FY128
120132
230±11 SDO
2012 VP113 (Biden) ≈ 225 sednoid
2002 VR128
84719
224+24
−22
plutino
Vanth
Orcus I
221±5 87±8 1.5+1.0
−0.5
moon of 90482 Orcus  ·
Hygiea
10
216±4 87.4±6.9 2.06±0.20 belt asteroid type C  ·
2004 NT33
444030
212+44
−40
cubewano
Proteus
Neptune VIII
210±7 15.5–31 ≈ 0.46–0.91 moon of Neptune  ·
Chaos
19521
208+42
−15
equivalent
cubewano
2001 QF298
469372
204+20
−22
plutino
Huya
38628
203±8 40.1 1.073±0.066 plutino; binary  ·
2004 PF115
175113
203+49
−38
plutino
Ilmarë
Varda I
201.5±20 22 moon of 174567 Varda

Legend:

SDO – scattered disc object
cubewano – classical Kuiper belt object
plutino – 2:3 orbital resonance with Neptune

From 100 to 199 km

This list contains a selection of objects estimated to be between 100 and 199 km in radius (200 and 399 km in diameter), being 200 km nicknamed the "potato radius" by astronomers. The largest of these may have a hydrostatic-equilibrium shape, but most are irregular (i.e., potato-shaped). 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). Many TNOs are omitted from this list as their sizes are poorly known.

Body Image Radius
(km)
Mass
(1018 kg)
Type Refs
r · M
2004 UX10
144897
199+16.3
−19.7
≳30 plutino  ·
1993 SC
15789
199+55
−85.5
≈ 47 plutino
Mimas
Saturn I
198.2±0.3 37.49±0.03 moon of Saturn  ·
1998 SN165
35671
196±20 cubewano
Actaea
Salacia I
196.5±16.5 20 moon of 120347 Salacia
2002 KX14
119951
194.6±4.4 cubewano
Hiʻiaka
Haumea I
185±10 16±2 moon of Haumea  ·
2001 UR163
42301
176±42.5 resonant KBO (4:9)
Nereid
Neptune II
170±25 35.7 moon of Neptune
1996 TL66
15874
170±10 SDO
2004 XA192
230965
170+60
−47.5
SDO
Interamnia
704
166±3 35.2±5.1 belt asteroid type F  ·
Europa
52
160±2 23.9±3.8 belt asteroid type C
1999 CD158
469306
< 155 ≈ 48 resonant KBO (4:7)
2007 OC10
470316
165+28
−27.5
≈ 30 SDO
Davida
511
149±2 26.6±7.3 belt asteroid type C
2002 TX300
55636
143±5 cubewano, Haumea family
2003 OP32
120178
137+23.5
−12.5
≈ 45 cubewano, Haumea family
Sylvia
87
137±2 14.3±0.5 outer belt asteroid type X; trinary
Lempo
47171
136±9 6.71 plutino; trinary
Eunomia
15
135±2 30.5±1.9 belt asteroid type S
Hyperion
Saturn VII
135±4 5.62±0.05 moon of Saturn  ·
Euphrosyne
31
134±2 16.5±2.6 belt asteroid type C; binary
1998 SM165
26308
134±14 6.87±1.8 resonant KBO (1:2)  ·
Cybele
65
131.5±1.5 14.8±1.8 outer belt asteroid type C
Juno
3
127±1 27.0±2.4 belt asteroid type S
Hiisi
Lempo II
126±8 5.273 secondary of 47171 Lempo
Hektor
624
125±13 7.9±1.4 Jupiter trojan (L4) type D; binary  ·
Chariklo
10199
124.8+3.0
−2.3
6.4±0.5 centaur; has rings
Sila
79360
124±15 10.8±0.22 cubewano; binary
2007 RW10
309239
124±15 quasi-satellite of Neptune
Altjira
148780
123+19
−70
cubewano; binary
Nunam
79360
118±15 secondary of 79360 Sila
Bamberga
324
114±2 10.2±0.9 belt asteroid type C
Patientia
451
112.9±2.3 10.9±5.3 belt asteroid type C  ·
Psyche
16
112±2 26.2±2.9 belt asteroid type M
Ceto
65489
112±5 5.4±0.4 extended centaur; binary  ·
Herculina
532
111.2±2.4 10 belt asteroid type S
2023 KQ14 (Ammonite) 110 - 190 sednoid
Moon of 148780 Altjira 110+17
−62
secondary of 148780 Altjira
Hesperia
69
110±15 5.86±1.18 belt asteroid type M  ·
Leleākūhonua
541132
110+14
−10
sednoid
Thisbe
88
109±2 11.6±2.2 belt asteroid type B
Doris
48
108±2 6.9±2.9 belt asteroid type C
Phoebe
Saturn IX
106.5±0.7 8.29±0.01 moon of Saturn  ·
Moon of 38628 Huya 106±15 5.1 moon of 38628 Huya
Fortuna
19
105.5±1.0 8.8±1.4 belt asteroid type G
Camilla
107
105±4 11.2±0.3 outer belt asteroid type C; trinary  ·
Themis
24
104±2 6.2±2.9 belt asteroid type C
Amphitrite
29
102±1 12.7±2.0 belt asteroid type S
Egeria
13
101±2 9.2±2.1 belt asteroid type G
Iris
7
100±5 13.5±2.3 belt asteroid type S
Legend:
centaur – asteroids orbiting between the outer planets
Jupiter trojan – asteroids located in Jupiter's L4 and L5 Lagrange points

From 50 to 99 km

This list contains a selection of objects 50 and 99 km in radius (100 km to 199 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. Asteroid spectral types are mostly Tholen, but some might be SMASS.

Body Image Radius
(km)
Mass
(1018 kg)
Type Refs
r · M
Elektra
130
99.5±1 6.4±0.2 belt asteroid type G; multiple
Bienor
54598
99+3
−3.5
centaur
Chiron
2060 or 95P
98±17 centaur; has rings
Hebe
6
97.5±1.5 12.4±2.4 belt asteroid type S
Larissa
Neptune VII
97±3 ≈ 4.2 moon of Neptune  ·
Ursula
375
96.8±1.3 8.4±5.3 belt asteroid type C  ·
Eugenia
45
94±1 5.8±0.1 belt asteroid type F; trinary
Hermione
121
94±3 5.0±0.3 outer belt asteroid type C; binary  ·
Daphne
41
94±7 6.1±0.9 belt asteroid type C; binary
Aurora
94
93.8±3.6[dubious – discuss] 6.2±3.6 belt asteroid type C  ·
Bertha
154
93.4±0.9 9.2±5.2[dubious – discuss] belt asteroid type C  ·
1995 SM55
24835
93.4±0.9 cubewano, Haumea family
Moon of 532037 Chiminigagua 93+12.5
−13
moon of 532037 Chiminigagua
Janus
Saturn X
89.5±1.4 1.898±0.001 moon of Saturn  ·
Teharonhiawako
88611
89+16
−18
2.44±0.03[dubious – discuss] cubewano; binary  ·
Aegle
96
88.9±0.8 6.4±6.3 belt asteroid type T  ·
Galatea
Neptune VI
88±4 2.12±0.08 moon of Neptune  ·
S/2015 (136472) 1 (MK2) 87.5 moon of Makemake
Phorcys
Ceto I
87+8
−9
≈ 1.67 secondary of 65489 Ceto  ·
Palma
372
86.8±1.4[dubious – discuss] 5.2±0.6 belt asteroid type B  ·
Metis
9
86.5±1 8.0±1.9 belt asteroid type S  ·
Alauda
702
86±28 6.06±0.36[dubious – discuss] belt asteroid type C; binary  ·
Hilda
153
85.3±1.6 outer belt asteroid; Hildas
Himalia
Jupiter VI
85 4.2±0.6 moon of Jupiter  ·
Freia
76
84.2±1.0 2.0±4.2[dubious – discuss] outer belt asteroid type P/type X  ·
Amalthea
Jupiter V
83.45±2.4 2.08±0.15 moon of Jupiter  ·
Agamemnon
911
83.3±2.0 Jupiter trojan (L4) type D
Elpis
59
82.6±2.3 3±0.5 belt asteroid type CP/type B  ·
Eleonora
354
82.5±1.5 7.5±2.7 belt asteroid type A
Weywot
Quaoar I
≈ 82.5 2.4+1.2
−1.1
moon of Quaoar
Nemesis
128
81.5±2.5 3.4±1.7 belt asteroid type C
Puck
Uranus XV
81±2 moon of Uranus
2002 KW14
307251
80.5+17.5
−20
≈ 30 cubewano
Sycorax
Uranus XVII
78.5+11.5
−7.5
moon of Uranus
Io
85
77.4±1.9[dubious – discuss] 2.6±1.5 belt asteroid type FC/type B  ·
Minerva
93
77.08±0.65 3.5±0.4 belt asteroid type C; trinary  ·
Alexandra
54
77.07±0.32 6.2±3.5[dubious – discuss] belt asteroid type C  ·
Laetitia
39
77±2 4.7±1.1 belt asteroid type S  ·
Nemausa
51
75±1.5 3.9±1.6 belt asteroid type G
Kalliope
22
75±2.5 7.7±0.4 belt asteroid type M; binary
Despina
Neptune V
75±3 moon of Neptune
Namaka
Haumea II
75±25 1.18±0.25 moon of Haumea  ·
Manwë
385446
≈ 75 ≈ 1.41 resonant KBO (4:7); binary  ·
Pales
49
≈ 74.9 4.2±2.2 belt asteroid type C  ·
Parthenope
11
74.5±1 5.5±0.4 belt asteroid type S
Arethusa
95
74.0±2.4 belt asteroid type C
Pulcova
762
73.7±0.4 1.4±0.1 belt asteroid type F; binary  ·
Flora
8
73±1 4.0±1.6 belt asteroid type S
Ino
173
72.5±1.5 2.2±1.3 belt asteroid type Xc
Adeona
145
72±1.5 2.4±0.3 belt asteroid type Xc
Irene
14
72±1 2.9±1.9 belt asteroid type S  ·
Gǃòʼé ǃHú
Gǃkúnǁʼhòmdímà I
71±4 secondary of 229762 Gǃkúnǁʼhòmdímà
Aglaja
47
71±4 3.2±1.7 belt asteroid type C  ·
Melpomene
18
70.5±1 4.5±0.9 belt asteroid type S
Lamberta
187
70.5±1 1.9±0.3 belt asteroid type Ch
Patroclus
617
70.2±0.4 1.36±0.11 Jupiter trojan (L5) type P; binary  ·
Julia
89
70±1.4 4.3±3.2 belt asteroid type S
Typhon
42355
69±4.5 0.87±0.03 resonant SDO (7:10); binary  ·
ǂKá̦gára
469705
69±12 1.29±0.07 cold classical KBO; binary
Massalia
20
67.8±1.8 5±1.04 belt asteroid type S  ·
Portia
Uranus XII
67.6±4 moon of Uranus
Emma
283
66.2±0.1 1.38±0.03 belt asteroid type X; binary  ·
Paha
Lempo I
66+4
−4.5
0.746±0.001 moon of 47171 Lempo  ·
Lucina
146
65.9±? belt asteroid type C
Sawiskera
Teharonhiawako I
65.5+12
−13
secondary of 88611 Teharonhiawako
Achilles
588
65.0±0.3 Jupiter trojan (L4) type DU
Panopaea
70
64.0±0.4 4.33±1.09 belt asteroid type C  ·
Thule
279
63.3±1.8 outer belt asteroid type D
Borasisi
66652
63+12.5
−25.5
3.433±0.027 cubewano; binary  ·
Albion
15760
≈ 62.5 TNO, first KBO discovered
Hestia
46
62.07±1.7 3.5 belt asteroid type P/type Xc  ·
Leto
68
61.3±1.6 3.28±1.9 belt asteroid type S  ·
ǃHãunu
ǂKá̦gára I
61±9 0.89±0.05 secondary of 469705 ǂKá̦gára
Undina
92
60.46±0.85 4.43±0.25 belt asteroid type X  ·
Bellona
28
60.45±1.90 2.62±0.15 belt asteroid type S  ·
Diana
78
60.30±1.35 1.27±0.13 belt asteroid type C  ·
Anchises
1173
60.2±1.5 Jupiter trojan (L5) type P
Bernardinelli-Bernstein
C/2014 UN271
60±7 comet
Galatea
74
59.4±1.4 6.13±5.36 belt asteroid type C  ·
Deiphobus
1867
59.1±0.8 Jupiter trojan (L5) type D
Äneas
1172
59.01±0.40 Jupiter trojan (L5) type D
Kleopatra
216
59±1 3.0±0.3 belt asteroid type M; trinary
Athamantis
230
59±1 2.3±1.1 belt asteroid type S
Diomedes
1437
58.89±0.59 Jupiter trojan (L4) type D
Terpsichore
81
58.9±0.4 6.19±5.31 belt asteroid type C  ·
Epimetheus
Saturn XI
58.1±1.8 0.5266±0.0006 moon of Saturn  ·
Victoria
12
58±1 2.7±1.3 belt asteroid type S
Circe
34
57.7±1.0 ≈ 3.66±0.03 belt asteroid type C  ·
Leda
38
57.7±0.7 5.71±5.47 belt asteroid type C  ·
Odysseus
1143
57.3±0.3 Jupiter trojan (L4) type D
Alcathous
2241
56.8±0.9 Jupiter trojan (L5) type D
Melete
56
56.62±0.85 4.61 belt asteroid type P  ·
Mnemosyne
57
56.3±1.4 ≈ 12.6±2.4 belt asteroid type S  ·
Nestor
659
56.2±0.9 Jupiter trojan (L4) type XC
Harmonia
40
55.6±0.2 belt asteroid type S
Euterpe
27
54.9±0.8 1.67±1.01 belt asteroid type S  ·
Antilochus
1583
54.4±0.3 Jupiter trojan (L4) type D
Thorondor
Manwë I
54 0.5 secondary of 385446 Manwë  ·
Thalia
23
53.8±1.1 1.96±0.09 belt asteroid type S  ·
Erato
62
53.5±0.3 belt asteroid type BU/type Ch
Astraea
5
53.3±1.6 2.9 belt asteroid type S  ·
Pabu
Borasisi I
52.5+10
−21
secondary of 66652 Borasisi
Eos
221
51.76±2.8 ≈ 5.87±0.34 belt asteroid type S/type K  ·
Aegina
91
51.7±0.2 belt asteroid type C
Leukothea
35
51.5±0.6 belt asteroid type C
Menoetius
Patroclus I
51.4±0.25 secondary of 617 Patroclus
Isis
42
51.4±1.4 1.58±0.52 belt asteroid type S  ·
Klotho
97
50.4±0.3 1.33±0.13 belt asteroid type M  ·
Troilus
1208
50.3±0.5 Jupiter trojan (L5) type FCU

From 20 to 49 km

This list includes few examples since there are about 589 asteroids in the asteroid belt with a measured radius between 20 and 49 km. 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). Most mass values of asteroids are assumed.

Body Image Radius
(km)
Mass
(1015 kg)
Type – notes Refs
r · M
Asterope
233
49.8±0.6 belt asteroid type T/type K
Pholus
5145
49.5+7.5
−7
centaur
Thebe
Jupiter XIV
49.3±2 moon of Jupiter
Lutetia
21
49±1 1700±20 belt asteroid type M
Kalypso
53
48.631±13.299 ≈ 5630±5000 belt asteroid type XC  ·
Notburga
626
48.42±2.335 belt asteroid type XC
Proserpina
26
47.4±0.85 748±895 belt asteroid type S  ·
Juliet
Uranus XI
46.8±4 moon of Uranus
Urania
30
44±1 1300±900 belt asteroid type S
Ausonia
63
46.5±1.5 1200±200 belt asteroid type S
Beatrix
83
44.819±1.326 belt asteroid type X
Concordia
58
44.806±0.419 belt asteroid type C
Echidna
Typhon I
44.5±3 moon of 42355 Typhon
Automedon
2920
44.287±0.898 Jupiter trojan (L4) type D
Antiope
90
43.9±0.5 828±22 belt asteroid type C; binary  ·
Prometheus
Saturn XVI
43.1±2.7 159.5±1.5 moon of Saturn  ·
Danaë
61
42.969±1.076 2890±2780 belt asteroid type S  ·
Thetis
17
42.449±1.014 1200 belt asteroid type S  ·
Pandora
55
42.397±1.251 belt asteroid type M
Huenna
379
42.394±0.779 383±19 belt asteroid type B/type C; binary  ·
Virginia
50
42.037±0.121 2310±700 belt asteroid type X/type Ch  ·
Feronia
72
41.975±2.01 ≈ 3320±8490 belt asteroid type TDG  ·
S/2000 (90) 1
Antiope I
41.9±0.5 secondary of 90 Antiope
Poulydamas
4348
41.016±0.313 Jupiter trojan (L5) type C
Logos
58534
41±9 458±6.9 cubewano; binary  ·
Pandora
Saturn XVII
40.7±1.5 137.1±1.9 moon of Saturn  ·
Thalassa
Neptune IV
40.7±2.8 moon of Neptune
Niobe
71
40.43±0.4 belt asteroid type S
Pomona
32
40.38±0.8 belt asteroid type S
Belinda
Uranus XIV
40.3±8 moon of Uranus
Elara
Jupiter VII
39.95±1.7 moon of Jupiter
Cressida
Uranus IX
39.8±2 moon of Uranus
Amycus
55576
38.15±6.25 centaur
Hylonome
10370
37.545 centaur
Socus
3708
37.831±0.404 Jupiter trojan (L5) type C
Nysa
44
37.83±0.37 belt asteroid type E
Rosalind
Uranus XIII
36±6 moon of Uranus
Maja
66
35.895±0.46 belt asteroid type C
Ariadne
43
35.67±0.627 ≈ 1210±220 belt asteroid type S  ·
Iphigenia
112
35.535±0.26 ≈ 1970±6780 belt asteroid type C  ·
Xiangliu
Gonggong I
≈ 35±15 moon of 225088 Gonggong
Dike
99
33.677±0.208 belt asteroid type C
Echeclus
60558 or 174P
32.3±0.8 centaur
Desdemona
Uranus X
32±4 moon of Uranus
Eurybates
3548
31.943±0.149 Jupiter trojan (L4) type CP
Eurynome
79
31.739±0.476 belt asteroid type S
Eurydike
75
31.189±0.802 belt asteroid type M
Halimede
Neptune IX
≈ 31 moon of Neptune
Phocaea
25
30.527±1.232 599±60 belt asteroid type S  ·
Naiad
Neptune III
30.2±3.2 moon of Neptune
Schwassmann–
Wachmann 1
29P
30.2±3.7 comet
Neso
Neptune XIII
≈ 30 moon of Neptune
Angelina
64
29.146±0.541 belt asteroid type E
Pasiphae
Jupiter VIII
28.9±0.4 moon of Jupiter
Alkmene
82
28.811±0.357 belt asteroid type S
Nessus
7066
28.5±8.5 centaur
Polana
142
27.406±0.139 belt asteroid type F
Bianca
Uranus VIII
27±2 moon of Uranus
Mathilde
253
26.4 103.3±4.4 belt asteroid type C  ·
Hidalgo
944
26.225±1.8 centaur
Orus
21900
25.405±0.405 Jupiter trojan (L4) type C/type D
Amalthea
113
25.069±0.633 belt asteroid type S; binary
Prospero
Uranus XVIII
≈ 25 moon of Uranus
Setebos
Uranus XIX
≈ 24 moon of Uranus
Carme
Jupiter XI
23.35±0.45 moon of Jupiter
Klytia
73
22.295±0.471 belt asteroid type S
Sao
Neptune XI
≈ 22 moon of Neptune
Echo
60
21.609±0.286 315±32 belt asteroid type S  ·
Metis
Jupiter XVI
21.5±2 ≈ 119.893 moon of Jupiter  ·
Ophelia
Uranus VII
21.4±4 moon of Uranus
Lysithea
Jupiter X
21.1±0.35 moon of Jupiter
Caliban
Uranus XVI
21+10
−6
moon of Uranus
Laomedeia
Neptune XII
≈ 21 moon of Neptune
Cordelia
Uranus VI
20.1±3 moon of Uranus
Psamathe
Neptune X
≈ 20 moon of Neptune

From 1 to 19 km

This list contains some examples of Solar System objects between 1 and 19 km in radius. This is a common size for asteroids, comets and irregular moons.

Body Image Radius
(km)
Mass
(1015 kg)
Type – notes Refs
r · M
Urda
167
19.968±0.132 belt asteroid type S
Hydra
Pluto III
19.65 48±42 moon of Pluto  ·
Siarnaq
Saturn XXIX
19.65±2.95 moon of Saturn
Koronis
158
19.513±0.231 belt asteroid type S
Nix
Pluto II
19.017 45±40 moon of Pluto  ·
Ganymed
1036
18.838±0.199 ≈ 167±318 Amor asteroid type S  ·
Okyrhoe
52872
18±0.6 centaur
Blarney
2320
18 belt asteroid
Helene
Saturn XII
17.6±0.4 moon of Saturn; Dione trojan (L4)
Sinope
Jupiter IX
17.5±0.3 moon of Jupiter
Hippocamp
Neptune XIV
17.4±1 ≈ 50 moon of Neptune  ·
Leucus
11351
17.078±0.323 Jupiter trojan (L4) type D
Stephano
Uranus XX
≈ 16 moon of Uranus
Arrokoth
486958
15.85±0.25 cubewano; contact binary
Ida
243
15.7 42±6 belt asteroid type S; binary  ·
Atlas
Saturn XV
15.1±0.9 6.6 moon of Saturn  ·
Ananke
Jupiter XII
14.55±0.3 moon of Jupiter
Albiorix
Saturn XXVI
14.3±2.7 moon of Saturn
Pan
Saturn XVIII
14.1±1.3 4.95 moon of Saturn  ·
Linus
Kalliope I
14±1 ≈ 60 asteroid moon of 22 Kalliope  ·
Dioretsa
20461
14±3 centaur; damocloid
Perdita
Uranus XXV
13±1 moon of Uranus
Telesto
Saturn XIII
12.4±0.4 moon of Saturn; Tethys trojan (L4)
Mab
Uranus XXVI
12±1 moon of Uranus
Phobos
Mars I
11.1±0.15 10.659 moon of Mars  ·
Paaliaq
Saturn XX
≈ 11 moon of Saturn
Francisco
Uranus XXII
≈ 11 moon of Uranus
Leda
Jupiter XIII
10.75±0.85 moon of Jupiter
Calypso
Saturn XIV
10.7±0.7 moons of Saturn; Tethys trojan (L5)
Polymele
15094
10.548±0.068 Jupiter trojan (L4) type P
Margaret
Uranus XXIII
≈ 10 moon of Uranus
Ferdinand
Uranus XXIV
≈ 10 moon of Uranus
Cupid
Uranus XXVII
9±1 moon of Uranus
Ymir
Saturn XIX
≈ 9 moon of Saturn
Trinculo
Uranus XXI
≈ 9 moon of Uranus
Eros
433
8.42±0.02 6.687±0.003 Amor asteroid type S  ·
Adrastea
Jupiter XV
8.2±2 moon of Jupiter
Kiviuq
Saturn XXIV
≈ 8 moon of Saturn
Tarvos
Saturn XXI
≈ 7.5 moon of Saturn
Kerberos
Pluto IV
≈ 6.333 16±9 moon of Pluto  ·
Gaspra
951
6.266 20–30 belt asteroid type S  ·
Deimos
Mars II
6.2±0.18 1.476 moon of Mars  ·
Skamandrios
Hektor I
6±1.5 asteroid moon of 624 Hektor
Ijiraq
Saturn XXII
≈ 6 moon of Saturn
Tsuchinshan–ATLAS
C/2023 A3
<5.9 ± 0.2 comet
Halley's Comet
1P
5.75 0.22 comet  ·
Styx
Pluto V
≈ 5.5 ≈ 7.65 moon of Pluto  ·
Romulus
Sylvia I
5.4±2.8 asteroid moon of 87 Sylvia
Masursky
2685
5.372±0.085 belt asteroid type S
Erriapus
Saturn XXVIII
≈ 5 moon of Saturn
Callirrhoe
Jupiter XVII
4.8±0.65 moon of Jupiter
Alexhelios
Kleopatra I
4.45±0.8 asteroid moon of 216 Kleopatra
Esclangona
1509
4.085±0.3 inner belt asteroid type S; binary
Themisto
Jupiter XVIII
≈ 4 moon of Jupiter
Daphnis
Saturn XXXV
3.8±0.8 0.077±0.015 moon of Saturn  ·
Petit-Prince
Eugenia I
3.5±1 asteroid moon of 45 Eugenia
Praxidike
Jupiter XXVII
3.5±0.35 moon of Jupiter
Bestla
Saturn XXXIX
≈ 3.5 moon of Saturn
Remus
Sylvia II
≈ 3.5 asteroid moon of 87 Sylvia
Kalyke
Jupiter XXIII
3.45±0.65 moon of Jupiter
Cleoselene
Kleopatra II
3.45±0.8 asteroid moon of 216 Kleopatra
Moon of 31 Euphrosyne 3.35±1.2 asteroid moon of 31 Euphrosyne
Tempel 1
9P
3±0.1 Jupiter-family comet; Deep Impact flyby and impacted
Ireland
5029
3 belt asteroid
Phaethon
3200
2.9 Apollo asteroid type F
1999 JM8
53319
2.7±0.6 Apollo asteroid type X
Borrelly
19P
2.66 Jupiter-family comet
Šteins
2867
2.58±0.084 belt asteroid type E
Atira
163693
2.4±0.25 Atira asteroid type S; binary
Annefrank
5535
2.4 belt asteroid type S
Balam
3749
2.332±0.107 0.51±0.02 belt asteroid type S; trinary  ·
Pallene
Saturn XXXIII
2.22±0.07 moon of Saturn
Florence
3122
2.201±0.015 0.079±0.002 Amor asteroid type S; trinary  ·
Wild 2
81P
2.133 Jupiter family comet
Litva
2577
2.115 Mars-crosser type EU; trinary
Churyumov–Gerasimenko
67P
2 0.00998 Jupiter-family comet  ·
Donaldjohanson
52246
1.948±0.007 belt asteroid type C
Camelot
9500
1.9 belt asteroid
Cuno
4183
1.826±0.051 Apollo asteroid type S/type Q
1986 DA
6178
1.575 Amor asteroid type M
Pichi üñëm
Alauda I
1.55±0.45 asteroid moon of 702 Alauda
Toutatis
4179
1.516 0.0505 Apollo asteroid type S  ·
Methone
Saturn XXXII
1.45±0.03 moon of Saturn
Carpo
Jupiter XLVI
1.44 Moon of Jupiter
Gault
6478
1.4+0.2
−0.1
Phocaea asteroid type S
1998 QE2
285263
1.375 Amor asteroid type S; binary
Polydeuces
Saturn XXXIV
1.3±0.4 moon of Saturn; Dione trojan (L5)
2001 SN263
153591
1.315±0.2 0.00951±0.00013 Amor asteroid type C; trinary  ·
S/2003 (1509) 1
Moon of 1509 Esclangona
1.285 asteroid moon of 1509 Esclangona
APL
132524
≈ 1.25 belt asteroid type S
Camillo
3752
1.153±0.044 Apollo asteroid type S
Cruithne
3753
1.036±0.053 Aten asteroid type Q; quasi-satellite of Earth
1996 HW1
8567
1.01 Amor asteroid

Below 1 km

This list contains examples of objects below 1 km in radius. That means that irregular bodies can have a longer chord in some directions, hence the mean radius averages out. 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, 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 109 kg, which is equivalent to one billion kg or 1012 grams (Teragram – Tg). Currently most of the objects of mass between 109 kg to 1012 kg (less than 1000 teragrams (Tg)) listed here are near-Earth asteroids (NEAs). The Aten asteroid 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, cosmic dust, and interplanetary dust cloud. (See also Visited/imaged bodies.)

Body Image Radius
(m)
Mass
(109 kg)
Type – notes Refs
r · M
Ra-Shalom
2100
990±25 Aten asteroid type C
Geographos
1620
980±30 Apollo asteroid type S
Midas
1981
975±35 Apollo asteroid type S
Mithra
4486
924.5±11 Apollo asteroid type S
2006 VW139
300163
900±0.1 Active asteroid
1998 OH
12538
831.5±164.5 Apollo asteroid type S
Tantalus
2102
824.5±22.5 Apollo asteroid type Q
Braille
9969
820 Mars-crosser type Q
2005 GO21
308242
780 Aten asteroid type S
Apollo
1862
≈ 750 Apollo asteroid type Q
1999 JD6
85989
731±10.5 Aten asteroid type K; contact binary
Icarus
1566
730 Apollo asteroid type S
Dactyl
Ida I
700 asteroid moon of 243 Ida
Castalia
4769
700 Apollo asteroid type S; contact binary
2007 PA8
214869
675±70 Apollo asteroid type Q
Moshup
66391
658.5±20 2490±54 Aten asteroid type S; binary  ·
1950 DA
29075
653 ≈ 2000 Apollo asteroid type S  ·
2006 HY51
394130
609±114 Apollo asteroid
Hartley 2
103P
570±80 ≈ 300 Jupiter-family comet  ·
2003 SD220
163899
515 Aten asteroid type S
Nyx
3908
500±75 Amor asteroid type V
Wikipedia
274301
475 Vestian asteroid  ·
Astronautica
100000
470 Hungaria asteroid type E  ·
2001 WN5
153814
466±5.5 Apollo asteroid
2017 YE5 450±25 Apollo asteroid type S; binary
Ryugu
162173
432.5±7.5 ≈ 450 Apollo asteroid type Cg  ·
1997 AE12
162058
423.5±6.5 Amor asteroid type S
2014 JO25
671294
409 Apollo asteroid type S; contact binary
Hermes
69230
400±50 Apollo asteroid type Sq
Didymos
65803
390±4 527 Apollo asteroid type Xk; binary  ·
Aten
2062
365±15 Aten asteroid type S
Aegaeon
Saturn LIII
330±60 moon of Saturn
2015 TB145 325±15 Apollo asteroid type S
1994 CC
136617
310±30 266±32.9 Apollo asteroid type Sq; trinary  ·
2001 WR1
172034
315.5±9 Amor asteroid type S
Golevka
6489
265±15 Apollo asteroid type Q
Bennu
101955
262.5±37.5 78±9 Apollo asteroid type B  ·
ATLAS
3I
260 - 374 Interstellar comet
2000 WO107
153201
255±41.5 Aten asteroid type X
Torifune
98943
232.5 ± 7.5 Apollo asteroid
2002 CU11
163132
230±8.5 Apollo asteroid
Squannit
Moshup I
225.5±13.5 asteroid moon of 66391 Moshup
2014 HQ124 204.5±84 Aten asteroid type S
2013 YP139 201±13 Apollo asteroid
2008 EV5
341843
200±7 Aten asteroid type X/type C
2006 DP14
388188
≈ 200 Apollo asteroid type S; contact binary
1988 EG
6037
199.5±1.35 Apollo asteroid type S
2010 TK7
706765
189.5±61.5 Aten asteroid; Earth trojan (L4)
2006 SU49
292220
≈ 188.5 ≈ 73 Apollo asteroid  ·
2005 YU55
308635
180±20 Apollo asteroid type C
2010 SO16
419624
178.5±63 Apollo asteroid; co-orbital with Earth
Itokawa
25143
173 35.1±1.05 Apollo asteroid type S  ·
Apophis
99942
162.5±7.5 ≈ 61 Aten asteroid type Sq  ·
S/2009 S 1 ≈ 150 moon of Saturn
2005 WK4
277475
142 Apollo asteroid type S
2004 BL86
357439
131.5±13 Apollo asteroid type V; binary
2007 TU24 125 Apollo asteroid type S
Zoozve
524522
≈ 118 Aten asteroid type X; co-orbital with Venus
2011 UW158
436724
110±20 Apollo asteroid type S
Dimorphos
Didymos I
85±15 asteroid moon of 65803 Didymos
2017 BQ6 78 Apollo asteroid type S
1994 WR12 65 Aten asteroid
YORP
54509
61.8 Apollo asteroid type S
2019 OK 28.5 – 165 Apollo asteroid
Duende
367943
23.75 Aten asteroid type L
Kamoʻoalewa
469219
20.5 Apollo asteroid type S; quasi-satellite of Earth
2012 TC4 11.5 Apollo asteroid type E/type Xe
2014 RC ≈ 11 Apollo asteroid type Sq
1998 KY26 5.5±1 Apollo asteroid type X
2010 RF12 ≈ 3.5 ≈ 0.0005 Apollo asteroid
2011 MD 3+2
−1
Apollo asteroid/Amor asteroid type S
2020 VT4 2.5 - 5.5 Aten asteroid
2008 TC3 2.05 0.00008 Apollo asteroid type F/type M
2023 BU 1.5 Apollo asteroid
2015 TC25 1 Apollo asteroid type E
2018 LA 0.8 - 2.6 Apollo asteroid  ·
2025 TF 0.6 - 1.35 Apollo asteroid
2011 CQ1 0.5 - 1.15 Aten asteroid
2020 CD3 0.45±0.05 Apollo asteroid
2020 CW 0.41 - 0.9 Apollo asteroid
2008 TS26 0.305 - 0.68 Apollo asteroid
2015 FF415 0.25 Apollo asteroid  ·
2024 BX1 0.22 Apollo asteroid
2025 UC11 0.205 - 0.465 Aten asteroid
2022 WJ1 0.2 - 0.3 Apollo asteroid

See also

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