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List of Solar System objects by size

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Parts-per-million chart of the relative mass distribution of the Solar System, each cubelet denoting 2×1024 kg

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.

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;[1] however, later studies revealed that icy satellites as large as Iapetus (1,470 kilometers in diameter) are not in hydrostatic equilibrium at this time,[2] 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.[3] 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 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.[4]

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 less certain masses.[5] 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[6] and JPL Solar System Dynamics,[5] give somewhat contradictory size and albedo estimates depending on which research paper is being cited.

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.

Graphical overview

[edit]
Relative diameters of the fifty largest bodies in the Solar System, colored by orbital region. Values are diameters in kilometers. Scale is linear.
  • 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.
    Relative masses of the Solar planets. Jupiter at 71% of the total and Saturn at 21% dominate the system.
  • 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 rounded moons of the Solar System. Mimas, Enceladus, and Miranda are too small to be visible at this scale.
    Relative masses of the rounded moons of the Solar System. Mimas, Enceladus, and Miranda are too small to be visible at this scale.

Objects with radii over 400 km

[edit]

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).[7] However, Ceres (r = 470 km) is the smallest body for which detailed measurements are consistent with hydrostatic equilibrium,[8] whereas Iapetus (r = 735 km) is the largest icy body that has been found to not be in hydrostatic equilibrium.[9] 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.[10]

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.[11]

Because Sedna and 2002 MS4 have no known moons, directly determining their mass is impossible without sending a probe (estimated to be from 1.7x1021 to 6.1×1021 kg for Sedna[12]).

Body[note 1] Image Radius[note 2] Volume Mass Surface area Density Gravity[note 3] Type Discovery
(km) (R🜨) (109 km3) (V🜨) (1021 kg) (M🜨) (106 km2) 🜨 (g/cm3) (m/s2) (🜨)
Sun
695700 ± ?[13] 109.2[14] 1,409,300,000[14] 1,301,000[14] 1989100000[14] 333,000[14] 6,078,700[14] 11,918[14] 1.409[14] 274.0[14] 27.94[14] G2V-class star prehistoric
Jupiter
69911±6[15] 10.97 1,431,280 1,321 1898187±88[15] 317.83 61,419[16] 120.41 1.3262±0.0003[15] 24.79[15] 2.528 gas giant planet; has rings prehistoric
Saturn
58232±6[15]
(136775 for A Ring) 		9.140 827,130 764 568317±13[15] 95.162 42,612[17] 83.54 0.6871±0.0002[15] 10.44[15] 1.065 gas giant planet; has rings prehistoric
Uranus
25362±7[15] 3.981 68,340 63.1 86813±4[15] 14.536 8083.1[18] 15.85 1.270±0.001[15] 8.87[15] 0.886 ice giant planet; has rings 1781
Neptune
24622±19[15] 3.865 62,540 57.7 102413±5[15] 17.147 7618.3[19] 14.94 1.638±0.004[15] 11.15[15] 1.137 ice giant planet; has rings 1846
Earth
6371.0±0.0001[15] 1 1,083.21 1 5972.4±0.3[15] 1 510.06447[20] 1 5.5136±0.0003[15] 9.81[15] 1 terrestrial planet prehistoric
Venus
6051.8±1[15] 0.9499 928.43 0.857 4867.5±0.2[15] 0.815 460.2[21] 0.903 5.243±0.003[15] 8.87[15] 0.905 terrestrial planet prehistoric
Mars
3389.5±0.2[15] 0.5320 163.18 0.151 641.71±0.03[15] 0.107 144.37[22] 0.283 3.9341±0.0007[15] 3.71[15] 0.379 terrestrial planet prehistoric
Ganymede
Jupiter III
2634.1±0.3 0.4135 76.30 0.0704 148.2 0.0248 86.999[23] 0.171 1.936 1.428 0.146 moon of Jupiter (icy) 1610
Titan
Saturn VI
2574.73±0.09[24] 0.4037[a] 71.50 0.0658 134.5 0.0225 83.3054[25] 0.163 1.880±0.004 1.354 0.138 moon of Saturn (icy) 1655
Mercury
2439.4±0.1[15] 0.3829 60.83 0.0562 330.11±0.02[15] 0.0553 74.797[26] 0.147 5.4291±0.007[15] 3.70[15] 0.377 terrestrial planet prehistoric
Callisto
Jupiter IV
2410.3±1.5[24] 0.3783 58.65 0.0541 107.6 0.018 73.005[27] 0.143 1.834±0.003 1.23603 0.126 moon of Jupiter (icy) 1610
Io
Jupiter I
1821.6±0.5[5] 0.2859 25.32 0.0234 89.32 0.015 41.698[28] 0.082 3.528±0.006 1.797 0.183 moon of Jupiter (terrestrial) 1610
Moon
Earth I
1737.4±0.1[29] 0.2727 21.958 0.0203 73.46[30] 0.0123 37.937[31] 0.074 3.344±0.005[29] 1.625 0.166 moon of Earth (terrestrial) prehistoric
Europa
Jupiter II
1560.8±0.5[5] 0.2450 15.93 0.0147 48.00 0.008035 30.613[32] 0.06 3.013±0.005 1.316 0.134 moon of Jupiter (terrestrial) 1610
Triton
Neptune I
1353.4±0.9[a][24] 0.2124[a] 10.38 0.0096 21.39±0.03 0.003599 23.018[33] 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 1.854±0.006 0.620 0.063 dwarf planet; plutino; multiple 1930
Eris
136199
1163±6[b][34] 0.1825[b] 6.59 0.0061 16.6±0.2[35] 0.0028 17 0.033 2.52±0.07 0.824 0.083 dwarf planet; SDO; binary 2003
Haumea
136108
798±6 to 816[36] 0.12 1.98[c] 0.0018 4.01±0.04[37] 0.00066 8.14 0.016 2.018[38][d] 0.401 0.0409 dwarf planet;
resonant KBO (7:12);
trinary; has rings 		2004
Titania
Uranus III
788.9±1.8[24] 0.1237[e] 2.06 0.0019 3.40±0.06 0.00059 7.82[39] 0.015 1.711±0.005 0.378 0.0385 moon of Uranus 1787
Rhea
Saturn V
763.8±1.0[e] 0.1199[e] 1.87 0.0017 2.307 0.00039 7.34[40] 0.014 1.236±0.005 0.26 0.027 moon of Saturn 1672
Oberon
Uranus IV
761.4±2.6[a][24] 0.1195[a] 1.85 0.0017 3.08±0.09 0.0005 7.285[41] 0.014 1.63±0.05 0.347 0.035 moon of Uranus 1787
Iapetus
Saturn VIII
735.6±1.5[5] 0.1153 1.66 0.0015 1.806 0.00033 6.8 0.013 1.088±0.013 0.223 0.0227 moon of Saturn 1671
Makemake
136472
715+19
−11[42] 		0.112 1.53 0.0014 ≈ 3.1 0.00053 6.4 0.013 ≈ 2.1 0.57 0.0581 dwarf planet; cubewano 2005
Gonggong
225088
615±25[43] 0.0983 1.03 0.0009 1.75±0.07 0.00029 4.753 0.009 1.72±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 1.586±0.015 0.00025 4.578[44] 0.009 1.70±0.02 0.288 0.0294 moon of Pluto 1978
Umbriel
Uranus II
584.7±2.8[24] 0.0918 0.837 0.0008 1.28±0.03 0.00020 4.3[45] 0.008 1.39±0.16 0.234 0.024 moon of Uranus 1851
Ariel
Uranus I
578.9±0.6[24] 0.0909 0.813 0.0007 1.25±0.02 0.000226 4.211[46] 0.008 1.66±0.15 0.269 0.027 moon of Uranus 1851
Dione
Saturn IV
561.7±0.45[24] 0.0881 0.741 0.0007 1.095 0.000183 3.965[47] 0.008 1.478±0.003 0.232 0.0237 moon of Saturn 1684
Quaoar
50000
543±2 0.0879 0.737 0.0007 1.20±0.05[48] 0.0002 3.83 0.008 2.0±0.5[49] 0.3 0.0306 dwarf planet; cubewano; binary; has rings 2002
Tethys
Saturn III
533.0±0.7[24] 0.0834 0.624 0.0006 0.617 0.000103 3.57[50] 0.007 0.984±0.003[51] 0.145 0.015 moon of Saturn 1684
Ceres
1
469.7±0.1[52] 0.0742 0.433 0.0004 0.938[53] 0.000157 2.85[54] 0.006[54] 2.17 0.28 0.029 dwarf planet; belt asteroid 1801
Orcus
90482
455+25
−20 		0.0719 0.404 0.0004 0.548±0.010[55] 0.000092 1.4±0.2[55] 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
423±11 0.0664 0.373 0.0003 0.492±0.007[56] 0.000082 1.5±0.1[56] 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

[edit]

From 200 to 399 km

[edit]

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.[57] 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.[10]

Body[note 1] Image Radius[note 2]
(km) 		Mass
(1018 kg) 		Density
(g/cm3) 		Type[note 4] Refs[note 5]
r · M
2002 MS4
307261
398±12 – – cubewano [59]
2002 AW197
55565
384±19 – – cubewano [60]
Varda
174567
373±8 245±6 1.23±0.04 cubewano; binary [61] · [61]
2013 FY27
532037
370±40 – – SDO; binary [62]
2003 AZ84
208996
362 ~ 386±6 (assuming HE) 150 ~ 210 (assuming HE) 0.76 ~ 0.87 (assuming HE) plutino; binary [58][63]
Ixion
28978
354.8±0.1 – – plutino [64]
2004 GV9
90568
340±17 – – cubewano [65]
2005 RN43
145452
340+28
−37 		– – cubewano [65]
Varuna
20000
334+77
−43 		≈ 160 0.99+0.09
−0.02 		cubewano [66] · [67]
2002 UX25
55637
332±15 125±3 0.82±0.11 cubewano; binary [68] · [69]
2005 RM43
145451
322 – – SDO [70][71]
Gǃkúnǁʼhòmdímà
229762
321±14 136.1±3.3 1.02±0.17 SDO; binary [72] · [73]
2014 UZ224
317.5+28.5
−30.5 		– – SDO [74]
2008 OG19
470599 		309.5+28
−56.5 		– 0.609±0.004 SDO [75] · [75]
2007 JJ43
278361 		305+85
−70 		– – cubewano [76]
Dysnomia
Eris I
≈ 300; ≤ 370 300–500
< 140 		1.8–2.4
< 1.2 		moon of Eris [77][55]
2010 KZ39 ≈ 287 – – SDO [78]
2014 EZ51
523692 		> 288 – – SDO [79]
2012 VP113 ≈ 287 – – sednoid [80]
2002 XW93
78799 		283+36
−37 		– – other TNO [81]
2004 XR190
612911
≈ 278 – – SDO [7]
2002 XV93
612533
275+11
−12 		– – plutino [82]
2015 RR245
523794 		≈ 270 – – resonant KBO (2:9); binary [80]
2003 UZ413
455502
≈ 268 – – plutino [7]
Vesta
4
262.7±0.1 259 3.46 belt asteroid type V [83] · [83]
2003 VS2
84922
262±4 – – plutino [84]
Pallas
2
256±2 204±3 2.92±0.08 belt asteroid type B [85][86]
2004 TY364
120348 		256+19
−20 		– – cubewano [87]
Enceladus
Saturn II
252.1±0.2 108.0±0.1 1.609±0.005 moon of Saturn [88] · [89]
2002 TC302
84522
250±7 – – resonant SDO (2:5) [90]
2005 UQ513
202421 		249+32
−38 		– – cubewano [60]
Miranda
Uranus V
235.8±0.7 65.9±7.5 1.2±0.15 moon of Uranus [91] · [92]
Dziewanna
471143
235+18
−5 		– – SDO [93]
2005 TB190
145480
232±31 – – detached object [94]
1999 DE9
26375 		231±23 – – resonant SDO (2:5) [95]
2003 FY128
120132 		230±11 – – SDO [94]
2002 VR128
84719 		224+24
−22 		– – plutino [82]
Vanth
Orcus I
221±5 87±8 1.5+1.0
−0.5 		moon of 90482 Orcus [96] · [55]
Hygiea
10
216±4 87.4±6.9 2.06±0.20 belt asteroid type C [97] · [86]
2004 NT33
444030 		212+44
−40 		– – cubewano [60]
Proteus
Neptune VIII
210±7 44 ≈ 1.3 moon of Neptune [5] · [5]
2005 QU182
303775 		208±37 – – SDO [94]
Chaos
19521
208+42
−15 equivalent 		– – cubewano [98]
2002 KX14
119951
207.5±0.5 – – cubewano [99]
2001 QF298
469372
204+20
−22 		– – plutino [82]
Huya
38628
203±8 > 50 > 1.43 plutino; binary [68] · [100]
2004 PF115
175113 		203+49
−38 		– – plutino [82]

Legend:

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

From 100 to 199 km

[edit]

This list contains a selection of objects estimated to be between 100 and 199 km in radius (200 and 399 km in diameter). The largest of these may have a hydrostatic-equilibrium shape, but most are irregular. Most of the trans-Neptunian objects (TNOs) 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).[101] Many TNOs are omitted from this list as their sizes are poorly known.[58]

Body[note 1] Image Radius[note 2]
(km) 		Mass
(1018 kg) 		Type Refs[note 5]
r · M
2004 UX10
144897 		199±20 ≈ 30 plutino [82] · [102]
Mimas
Saturn I
198.2±0.3 37.49±0.03 moon of Saturn [88] · [89][24]
1998 SN165
35671 		196±20 cubewano [60]
2001 UR163
42301
≈ 176 resonant KBO (4:9) [58]
Nereid
Neptune II
170±25 moon of Neptune [24]
1996 TL66
15874 		170±10 SDO [94]
2004 XA192
230965 		170+60
−47.5 		SDO [82]
2002 WC19
119979
≈ 169 77±5 resonant KBO (1:2); binary [103] · [103]
Interamnia
704
166±3 35.2±5.1 belt asteroid type F [104] · [86]
Ilmarë
Varda I
163±18 moon of 174567 Varda [105]
Europa
52
160±2 23.9±3.8 belt asteroid type C [86]
Hiʻiaka
Haumea I
≈ 160 17.9±1.1 moon of Haumea [37] · [37]
Davida
511
149±2 26.6±7.3 belt asteroid type C [86]
2002 TX300
55636
143±5 cubewano [106]
Actaea
Salacia I
143±12 moon of 120347 Salacia [107]
Sylvia
87
137±2 14.3±0.5 outer belt asteroid type X; trinary [86]
Lempo
47171
136±9 plutino; trinary [108]
Eunomia
15
135±2 30.5±1.9 belt asteroid type S [86]
Hyperion
Saturn VII
135±4 5.62±0.05 moon of Saturn [57] · [57][24]
Euphrosyne
31
134±2 16.5±2.6 belt asteroid type C; binary [86]
1998 SM165
26308
134±14 6.87±1.8 resonant KBO (1:2) [109] · [109]
Cybele
65
131.5±1.5 14.8±1.8 outer belt asteroid type C [110]
Chariklo
10199
≈ 130 centaur; has rings [111]
Juno
3
127±1 27.0±2.4 belt asteroid type S [86]
Hiisi
Lempo II
126±8 secondary of 47171 Lempo [108]
Hektor
624
125±13 7.9±1.4 Jupiter trojan (L4) type D; binary [112] · [112]
Sila
79360
124±15 10.8±0.22 cubewano; binary [113]
2007 RW10
309239 		124±15 quasi-satellite of Neptune [94]
Altjira
148780
123+19
−70 		cubewano; binary [60]
Nunam
79360
118±15 secondary of 79360 Sila [113]
Bamberga
324
114±2 10.2±0.9 belt asteroid type C [86]
Patientia
451 		112.9±2.3 10.9±5.3 belt asteroid type C [114] · [115]
Psyche
16
112±2 26.2±2.9 belt asteroid type M [86]
Ceto
65489
112±5 5.4±0.4 extended centaur; binary [94] · [116]
Herculina
532
111.2±2.4 belt asteroid type S [117]
S/2007 (148780) 1
Altjira I
110+17
−62 		secondary of 148780 Altjira [60]
Hesperia
69
110±15 5.86±1.18 belt asteroid type M [117] · [115][118]
Thisbe
88
109±2 11.6±2.2 belt asteroid type B [86]
Doris
48
108±2 6.9±2.9 belt asteroid type C [86]
Chiron
2060 or 95P
108±5 centaur; has rings [68]
Phoebe
Saturn IX
106.5±0.7 8.29±0.01 moon of Saturn [57] · [57][24]
S/2012 (38628) 1
Huya I
106±15 moon of 38628 Huya [68]
Fortuna
19
105.5±1.0 8.8±1.4 belt asteroid type G [86]
Camilla
107
105±4 11.2±0.3 outer belt asteroid type C; trinary [114] · [115]
Themis
24
104±2 6.2±2.9 belt asteroid type C [86]
Amphitrite
29
102±1 12.7±2.0 belt asteroid type S [86]
Egeria
13
101±2 9.2±2.1 belt asteroid type G [86]
Iris
7
100±5 13.5±2.3 belt asteroid type S [86]
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

[edit]

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.[58] Asteroid spectral types are mostly Tholen, but some might be SMASS.

Body[note 1] Image Radius[note 2]
(km) 		Mass
(1018 kg) 		Type Refs[note 5]
r · M
Elektra
130
99.5±1 6.4±0.2 belt asteroid type G; multiple [86]
Bienor
54598 		99+3
−3.5 		centaur [119]
Hebe
6
97.5±1.5 12.4±2.4 belt asteroid type S [86]
Larissa
Neptune VII
97±3 ≈ 4.2 moon of Neptune [120] · [f][24]
Ursula
375
96.8±1.3 8.4±5.3 belt asteroid type C [122] · [115]
S/2018 (532037) 1 ≈ 95 moon of 2013 FY27 [62]
Eugenia
45
94±1 5.8±0.1 belt asteroid type F; trinary [86]
Hermione
121
94±3 5.0±0.3 outer belt asteroid type C; binary [123] · [115]
Daphne
41
94±7 6.1±0.9 belt asteroid type C; binary [86]
Aurora
94
93.8±3.6[dubious – discuss] 6.2±3.6 belt asteroid type C [124] · [115]
Bertha
154
93.4±0.9 9.2±5.2[dubious – discuss] belt asteroid type C [115] · [115]
Janus
Saturn X
89.5±1.4 1.898±0.001 moon of Saturn [57] · [57]
Teharonhiawako
88611
89+16
−18 		2.44±0.03[dubious – discuss] cubewano; binary [60] · [125]
Aegle
96 		88.9±0.8 6.4±6.3 belt asteroid type T [114] · [115]
Galatea
Neptune VI
88±4 2.12±0.08 moon of Neptune [120] · [126][24]
Phorcys
Ceto I
87+8
−9 		≈ 1.67 secondary of 65489 Ceto [116] · [116]
Palma
372
86.8±1.4[dubious – discuss] 5.2±0.6 belt asteroid type B [127] · [115]
Metis
9
86.5±1 8.0±1.9 belt asteroid type S [114] · [115]
Alauda
702
86±28 6.06±0.36[dubious – discuss] belt asteroid type C; binary [127] · [128]
Hilda
153
85.3±1.6 outer belt asteroid; Hildas [117]
Himalia
Jupiter VI
85 4.2±0.6 moon of Jupiter [5] · [129]
Namaka
Haumea II
≈ 85 1.8±1.5 moon of Haumea [37] · [37]
Weywot
Quaoar I
≈ 85 < ≈ 5 moon of 50000 Quaoar
Freia
76
84.2±1.0 2.0±4.2[dubious – discuss] outer belt asteroid type P/type X [122] · [115]
Amalthea
Jupiter V
83.45±2.4 2.08±0.15 moon of Jupiter [130] · [131][24]
Agamemnon
911
83.3±2.0 Jupiter trojan (L4) type D [117]
Elpis
59 		82.6±2.3 3±0.5 belt asteroid type CP/type B [114] · [115]
Eleonora
354
82.5±1.5 7.5±2.7 belt asteroid type A [86]
Nemesis
128
81.5±2.5 3.4±1.7 belt asteroid type C [86]
Puck
Uranus XV
81±2 moon of Uranus [132]
S/2015 (136472) 1
Makemake I
≈ 80 moon of Makemake [133]
Sycorax
Uranus XVII
78.5+11.5
−7.5 		moon of Uranus [134]
Io
85
77.4±1.9[dubious – discuss] 2.6±1.5 belt asteroid type FC/type B [117] · [115]
Minerva
93
77.08±0.65 3.5±0.4 belt asteroid type C; trinary [114] · [115]
Alexandra
54
77.07±0.32 6.2±3.5[dubious – discuss] belt asteroid type C [114] · [115]
Laetitia
39 		77±2 4.7±1.1 belt asteroid type S [115] · [115]
Nemausa
51
75±1.5 3.9±1.6 belt asteroid type G [86]
Kalliope
22
75±2.5 7.7±0.4 belt asteroid type M; binary [86]
Despina
Neptune V
75±3 moon of Neptune [24]
Manwë
385446
≈ 75 ≈ 1.41 resonant KBO (4:7); binary [135] · [135]
Pales
49 		≈ 74.9 4.2±2.2 belt asteroid type C [117] · [115]
Parthenope
11
74.5±1 5.5±0.4 belt asteroid type S [86]
Arethusa
95
74.0±2.4 belt asteroid type C [124]
Pulcova
762
73.7±0.4 1.4±0.1 belt asteroid type F; binary [114] · [136]
Flora
8
73±1 4.0±1.6 belt asteroid type S [86]
Ino
173
72.5±1.5 2.2±1.3 belt asteroid type Xc [86]
Adeona
145
72±1.5 2.4±0.3 belt asteroid type Xc [86]
Irene
14
72±1 2.9±1.9 belt asteroid type S [122] · [115]
Melpomene
18
70.5±1 4.5±0.9 belt asteroid type S [86]
Lamberta
187
70.5±1 1.9±0.3 belt asteroid type Ch [86]
Aglaja
47 		71±4 3.2±1.7 belt asteroid type C [115] · [115]
Patroclus
617
70.2±0.4 1.36±0.11 Jupiter trojan (L5) type P; binary [114] · [115]
Julia
89
70±1.4 4.3±3.2 belt asteroid type S [86]
Typhon
42355
69±4.5 0.87±0.03 resonant SDO (7:10); binary [119] · [137]
Massalia
20
67.8±1.8 5±1.04 belt asteroid type S [127] · [115]
Portia
Uranus XII
67.6±4 moon of Uranus [5]
Emma
283
66.2±0.1 1.38±0.03 belt asteroid type X; binary [114] · [115]
Paha
Lempo I
66+4
−4.5 		0.746±0.001 moon of 47171 Lempo [108] · [138]
Lucina
146
65.9±? belt asteroid type C [139]
Sawiskera
Teharonhiawako I
65.5+12
−13 		secondary of 88611 Teharonhiawako [60]
Achilles
588
65.0±0.3 Jupiter trojan (L4) type DU [114]
Panopaea
70 		64.0±0.4 4.33±1.09 belt asteroid type C [114] · [115]
Thule
279 		63.3±1.8 outer belt asteroid type D [117]
Borasisi
66652
63+12.5
−25.5 		3.433±0.027 cubewano; binary [60] · [140]
Hestia
46 		62.07±1.7 3.5 belt asteroid type P/type Xc [117] · [141]
Leto
68
61.3±1.6 3.28±1.9 belt asteroid type S [114] · [115]
Undina
92 		60.46±0.85 4.43±0.25 belt asteroid type X [122] · [115]
Bellona
28
60.45±1.90 2.62±0.15 belt asteroid type S [142] · [115]
Diana
78 		60.30±1.35 1.27±0.13 belt asteroid type C [143] · [115]
Anchises
1173
60.2±1.5 Jupiter trojan (L5) type P [122]
Bernardinelli-Bernstein
C/2014 UN271
60±7 comet [144]
Galatea
74 		59.4±1.4 6.13±5.36 belt asteroid type C [145] · [115]
Deiphobus
1867 		59.1±0.8 Jupiter trojan (L5) type D [146]
Äneas
1172 		59.01±0.40 Jupiter trojan (L5) type D [147]
Kleopatra
216
59±1 3.0±0.3 belt asteroid type M; trinary [86]
Athamantis
230
59±1 2.3±1.1 belt asteroid type S [86]
Diomedes
1437
58.89±0.59 Jupiter trojan (L4) type D [148]
Terpsichore
81 		58.9±0.4 6.19±5.31 belt asteroid type C [149] · [115]
Epimetheus
Saturn XI
58.1±1.8 0.5266±0.0006 moon of Saturn [57] · [57]
Victoria
12
58±1 2.7±1.3 belt asteroid type S [86]
Circe
34
57.7±1.0 ≈ 3.66±0.03 belt asteroid type C [114] · [115]
Leda
38
57.7±0.7 5.71±5.47 belt asteroid type C [115] · [115]
Odysseus
1143 		57.3±0.3 Jupiter trojan (L4) type D [150]
Alcathous
2241 		56.8±0.9 Jupiter trojan (L5) type D [151]
Melete
56
56.62±0.85 4.61 belt asteroid type P [117] · [115]
Mnemosyne
57 		56.3±1.4 ≈ 12.6±2.4 belt asteroid type S [152] · [115]
Nestor
659 		56.2±0.9 Jupiter trojan (L4) type XC [153]
Harmonia
40
55.6±0.2 belt asteroid type S [154]
Leleākūhonua
541132 		55+7
−5 		sednoid [155]
Euterpe
27
54.9±0.8 1.67±1.01 belt asteroid type S [122] · [115]
Antilochus
1583 		54.4±0.3 Jupiter trojan (L4) type D [114]
Thorondor
Manwë I
54 0.5 secondary of 385446 Manwë [135] · [135]
Thalia
23
53.8±1.1 1.96±0.09 belt asteroid type S [156] · [115]
Erato
62
53.5±0.3 belt asteroid type BU/type Ch [157]
Astraea
5
53.3±1.6 2.9 belt asteroid type S [158] · [141]
Pabu
Borasisi I
52.5+10
−21 		secondary of 66652 Borasisi [60]
Eos
221 		51.76±2.8 ≈ 5.87±0.34 belt asteroid type S/type K [115] · [115]
Aegina
91 		51.7±0.2 belt asteroid type C [159]
Leukothea
35
51.5±0.6 belt asteroid type C [160]
Menoetius
Patroclus I
51.4±0.25 secondary of 617 Patroclus [161]
Isis
42
51.4±1.4 1.58±0.52 belt asteroid type S [115] · [115]
Klotho
97
50.4±0.3 1.33±0.13 belt asteroid type M [114] · [115]
Troilus
1208
50.3±0.5 Jupiter trojan (L5) type FCU [162]

From 20 to 49 km

[edit]

This list includes few examples since there are about 589 asteroids in the asteroid belt with a measured radius between 20 and 49 km.[163] 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.[115][164]

Body[note 1] Image Radius[note 2]
(km) 		Mass
(1015 kg) 		Type – notes Refs[note 5]
r · M
Asterope
233 		49.8±0.6 belt asteroid type T/type K [165]
Pholus
5145 		49.5+7.5
−7 		centaur [119]
Thebe
Jupiter XIV
49.3±2 moon of Jupiter [130]
Lutetia
21
49±1 1700±20 belt asteroid type M [86]
Kalypso
53
48.631±13.299 ≈ 5630±5000 belt asteroid type XC [166] · [115]
Notburga
626
48.42±2.335 belt asteroid type XC [115]
Proserpina
26
47.4±0.85 748±895 belt asteroid type S [167] · [115]
Juliet
Uranus XI
46.8±4 moon of Uranus [5]
Urania
30
44±1 1300±900 belt asteroid type S [86]
Ausonia
63
46.5±1.5 1200±200 belt asteroid type S [86]
Beatrix
83 		44.819±1.326 belt asteroid type X [114]
Concordia
58 		44.806±0.419 belt asteroid type C [114]
Echidna
Typhon I
44.5±3 moon of 42355 Typhon [137]
Automedon
2920 		44.287±0.898 Jupiter trojan (L4) type D [168]
Antiope
90 		43.9±0.5 828±22 belt asteroid type C; binary [169] · [169]
Prometheus
Saturn XVI
43.1±2.7 159.5±1.5 moon of Saturn [57] · [57]
Danaë
61 		42.969±1.076 2890±2780 belt asteroid type S [170] · [115]
Thetis
17
42.449±1.014 1200 belt asteroid type S [171] · [164]
Pandora
55
42.397±1.251 belt asteroid type M [172]
Huenna
379 		42.394±0.779 383±19 belt asteroid type B/type C; binary [173] · [174]
Virginia
50 		42.037±0.121 2310±700 belt asteroid type X/type Ch [175] · [115]
Feronia
72
41.975±2.01 ≈ 3320±8490 belt asteroid type TDG [115] · [115]
S/2000 (90) 1
Antiope I 		41.9±0.5 secondary of 90 Antiope [169]
Poulydamas
4348 		41.016±0.313 Jupiter trojan (L5) type C [176]
Logos
58534
41±9 458±6.9 cubewano; binary [177] · [177]
Pandora
Saturn XVII
40.7±1.5 137.1±1.9 moon of Saturn [57] · [57]
Thalassa
Neptune IV
40.7±2.8 moon of Neptune [120]
Niobe
71
40.43±0.4 belt asteroid type S [122]
Pomona
32
40.38±0.8 belt asteroid type S [178]
Belinda
Uranus XIV
40.3±8 moon of Uranus [5]
Elara
Jupiter VII
39.95±1.7 moon of Jupiter [179]
Cressida
Uranus IX
39.8±2 moon of Uranus [5]
Amycus
55576 		38.15±6.25 centaur [95]
Hylonome
10370
37.545 centaur [180]
Socus
3708 		37.831±0.404 Jupiter trojan (L5) type C [114]
Nysa
44
37.83±0.37 belt asteroid type E [122]
Rosalind
Uranus XIII
36±6 moon of Uranus [5]
Maja
66
35.895±0.46 belt asteroid type C [122]
Ariadne
43
35.67±0.627 ≈ 1210±220 belt asteroid type S [181] · [115]
Iphigenia
112 		35.535±0.26 ≈ 1970±6780 belt asteroid type C [115] · [115]
Xiangliu
Gonggong I 		≈ 35±15 moon of (225088) Gonggong
Dike
99
33.677±0.208 belt asteroid type C [182]
Echeclus
60558 or 174P 		32.3±0.8 centaur [119]
Desdemona
Uranus X
32±4 moon of Uranus [5]
Eurybates
3548
31.943±0.149 Jupiter trojan (L4) type CP [114]
Eurynome
79
31.739±0.476 belt asteroid type S [183]
Eurydike
75 		31.189±0.802 belt asteroid type M [184]
Halimede
Neptune IX
≈ 31 moon of Neptune [5]
Phocaea
25
30.527±1.232 599±60 belt asteroid type S [114] · [115]
Naiad
Neptune III
30.2±3.2 moon of Neptune [120]
Schwassmann–
Wachmann 1
29P
30.2±3.7 comet [185]
Neso
Neptune XIII
≈ 30 moon of Neptune [5]
Angelina
64
29.146±0.541 belt asteroid type E [186]
Pasiphae
Jupiter VIII
28.9±0.4 moon of Jupiter [179]
Alkmene
82
28.811±0.357 belt asteroid type S [187]
Nessus
7066
28.5±8.5 centaur [119]
Polana
142 		27.406±0.139 belt asteroid type F [188]
Bianca
Uranus VIII
27±2 moon of Uranus [5]
Mathilde
253
26.4 103.3±4.4 belt asteroid type C [189] · [190]
Hidalgo
944
26.225±1.8 centaur [122]
Orus
21900
25.405±0.405 Jupiter trojan (L4) type C/type D [114]
Amalthea
113 		25.069±0.633 belt asteroid type S; binary [114]
Prospero
Uranus XVIII
≈ 25 moon of Uranus [5]
Setebos
Uranus XIX
≈ 24 moon of Uranus [5]
Carme
Jupiter XI
23.35±0.45 moon of Jupiter [179]
Klytia
73
22.295±0.471 belt asteroid type S [191]
Sao
Neptune XI
≈ 22 moon of Neptune [5]
Echo
60
21.609±0.286 315±32 belt asteroid type S [192] · [115]
Metis
Jupiter XVI
21.5±2 ≈ 119.893 moon of Jupiter [130] · [193]
Ophelia
Uranus VII
21.4±4 moon of Uranus [5]
Lysithea
Jupiter X
21.1±0.35 moon of Jupiter [179]
Caliban
Uranus XVI
21+10
−6 		moon of Uranus [134]
Laomedeia
Neptune XII
≈ 21 moon of Neptune [5]
Cordelia
Uranus VI
20.1±3 moon of Uranus [5]
Psamathe
Neptune X
≈ 20 moon of Neptune [5]

From 1 to 19 km

[edit]

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[note 1] Image Radius[note 2]
(km) 		Mass
(1015 kg) 		Type – notes Refs[note 5]
r · M
Urda
167
19.968±0.132 belt asteroid type S [194]
Hydra
Pluto III
19.65 48±42 moon of Pluto [195] · [196]
Siarnaq
Saturn XXIX
19.65±2.95 moon of Saturn [179]
Koronis
158
19.513±0.231 belt asteroid type S [197]
Nix
Pluto II
19.017 45±40 moon of Pluto [195] · [196]
Ganymed
1036
18.838±0.199 ≈ 167±318 Amor asteroid type S [114] · [115]
Okyrhoe
52872 		18±0.6 centaur [198]
Helene
Saturn XII
17.6±0.4 moon of Saturn; Dione trojan (L4) [57]
Sinope
Jupiter IX
17.5±0.3 moon of Jupiter [179]
Hippocamp
Neptune XIV
17.4±1 ≈ 50 moon of Neptune [120] · [120]
Leucus
11351
17.078±0.323 Jupiter trojan (L4) type D [114]
Stephano
Uranus XX
≈ 16 moon of Uranus [5]
Arrokoth
486958
15.85±0.25 cubewano; contact binary [199]
Ida
243
15.7 42±6 belt asteroid type S; binary [200] · [201]
Atlas
Saturn XV
15.1±0.9 6.6 moon of Saturn [57] · [57]
Ananke
Jupiter XII
14.55±0.3 moon of Jupiter [179]
Albiorix
Saturn XXVI
14.3±2.7 moon of Saturn [179]
Pan
Saturn XVIII
14.1±1.3 4.95 moon of Saturn [57] · [202]
Linus
Kalliope I 		14±1 ≈ 60 asteroid moon of 22 Kalliope [203] · [204]
Dioretsa
20461 		14±3 centaur; damocloid [205]
Perdita
Uranus XXV
13±1 moon of Uranus [5]
Telesto
Saturn XIII
12.4±0.4  moon of Saturn; Tethys trojan (L4) [57]
Mab
Uranus XXVI
12±1 moon of Uranus [5]
Phobos
Mars I
11.1±0.15 10.659 moon of Mars [206] · [207]
Paaliaq
Saturn XX
≈ 11 moon of Saturn [5]
Francisco
Uranus XXII 		≈ 11 moon of Uranus [5]
Leda
Jupiter XIII
10.75±0.85 moon of Jupiter [179]
Calypso
Saturn XIV
10.7±0.7  moons of Saturn; Tethys trojan (L5) [57]
Polymele
15094
10.548±0.068 Jupiter trojan (L4) type P [117]
Margaret
Uranus XXIII
≈ 10 moon of Uranus [5]
Ferdinand
Uranus XXIV
≈ 10 moon of Uranus [5]
Cupid
Uranus XXVII
9±1 moon of Uranus [5]
Ymir
Saturn XIX
≈ 9 moon of Saturn [5]
Trinculo
Uranus XXI 		≈ 9 moon of Uranus [5]
Eros
433
8.42±0.02 6.687±0.003 Amor asteroid type S [208] · [208]
Adrastea
Jupiter XV
8.2±2 moon of Jupiter [5]
Kiviuq
Saturn XXIV
≈ 8 moon of Saturn [5]
Tarvos
Saturn XXI
≈ 7.5 moon of Saturn [5]
Kerberos
Pluto IV
≈ 6.333 16±9 moon of Pluto [209] · [210]
Gaspra
951
6.266 20–30 belt asteroid type S [211] · [212]
Deimos
Mars II
6.2±0.18 1.476 moon of Mars [5] · [213]
Skamandrios
Hektor I 		6±1.5 asteroid moon of 624 Hektor [112]
Ijiraq
Saturn XXII
≈ 6 moon of Saturn [5]
Halley's Comet
1P
5.75 0.22 comet [214] · [215]
Styx
Pluto V
≈ 5.5 ≈ 7.65 moon of Pluto [209] · [210]
Romulus
Sylvia I
5.4±2.8 asteroid moon of 87 Sylvia [216]
Masursky
2685
5.372±0.085 belt asteroid type S [217]
Erriapus
Saturn XXVIII
≈ 5 moon of Saturn [5]
Callirrhoe
Jupiter XVII
4.8±0.65 moon of Jupiter [179]
Alexhelios
Kleopatra I
4.45±0.8 asteroid moon of 216 Kleopatra [218]
Esclangona
1509 		4.085±0.3 inner belt asteroid type S; binary [219]
Themisto
Jupiter XVIII
≈ 4 moon of Jupiter [5]
Daphnis
Saturn XXXV
3.8±0.8 0.077±0.015 moon of Saturn [57] · [57]
Petit-Prince
Eugenia I 		3.5±1 asteroid moon of 45 Eugenia [220]
Praxidike
Jupiter XXVII
3.5±0.35 moon of Jupiter [179]
Bestla
Saturn XXXIX
≈ 3.5 moon of Saturn [5]
Remus
Sylvia II
≈ 3.5 asteroid moon of 87 Sylvia [216]
Kalyke
Jupiter XXIII
3.45±0.65 moon of Jupiter [179]
Cleoselene
Kleopatra II
3.45±0.8 asteroid moon of 216 Kleopatra [218]
S/2019 (31) 1
Euphrosyne I 		3.35±1.2 asteroid moon of 31 Euphrosyne [221]
Tempel 1
9P
3±0.1 Jupiter-family comet; Deep Impact flyby and impacted [222]
Phaethon
3200
2.9 Apollo asteroid type F [223]
1999 JM8
53319
2.7±0.6 Apollo asteroid type X [224]
Borrelly
19P
2.66 Jupiter-family comet [225]
Šteins
2867
2.58±0.084 belt asteroid type E [114]
Atira
163693
2.4±0.25 Atira asteroid type S; binary [226]
Annefrank
5535
2.4 belt asteroid type S [227]
Balam
3749
2.332±0.107 0.51±0.02 belt asteroid type S; trinary [228] · [229]
Pallene
Saturn XXXIII
2.22±0.07 moon of Saturn [230]
Florence
3122
2.201±0.015 0.079±0.002 Amor asteroid type S; trinary [124] · [231]
Wild 2
81P
2.133 Jupiter family comet [232]
Litva
2577 		2.115 Mars-crosser type EU; trinary [233]
Churyumov–Gerasimenko
67P
2 0.00998 Jupiter-family comet [234] · [235]
Donaldjohanson
52246 		1.948±0.007 belt asteroid type C [236]
Cuno
4183
1.826±0.051 Apollo asteroid type S/type Q [237]
1986 DA
6178 		1.575 Amor asteroid type M [238]
Pichi üñëm
Alauda I 		1.55±0.45 asteroid moon of 702 Alauda [239]
Toutatis
4179
1.516 0.0505 Apollo asteroid type S [240] · [240]
Methone
Saturn XXXII
1.45±0.03 moon of Saturn [230]
Carpo (moon)
Jupiter XLVI 		1.44 Moon of Jupiter
1998 QE2
285263
1.375 Amor asteroid type S; binary [241]
Polydeuces
Saturn XXXIV
1.3±0.4 moon of Saturn; Dione trojan (L5) [57]
2001 SN263
153591
1.315±0.2 0.00951±0.00013 Amor asteroid type C; trinary [242] · [243]
S/2003 (1509) 1
Esclangona I 		1.285 asteroid moon of 1509 Esclangona [244]
APL
132524
≈ 1.25 belt asteroid type S [245]
Camillo
3752
1.153±0.044 Apollo asteroid type S [124]
Cruithne
3753
1.036±0.053 Aten asteroid type Q; quasi-satellite of Earth [246]

Below 1 km

[edit]
See also: Satellite and Space debris

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,[247] 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[note 1] Image Radius[note 2]
(m) 		Mass
(109 kg) 		Type – notes Refs[note 5]
r · M
Ra-Shalom
2100
990±25 Aten asteroid type C [122]
Geographos
1620
980±30 Apollo asteroid type S [114]
Midas
1981 		975±35 Apollo asteroid type S [122]
Mithra
4486 		924.5±11 Apollo asteroid type S [124]
1998 OH
12538 		831.5±164.5 Apollo asteroid type S [124]
Tantalus
2102
824.5±22.5 Apollo asteroid type Q [248]
Braille
9969
820 Mars-crosser type Q [249]
2005 GO21
308242
780 Aten asteroid type S [250]
Apollo
1862
≈ 750 Apollo asteroid type Q [251]
1999 JD6
85989
731±10.5 Aten asteroid type K; contact binary [252]
Icarus
1566
730 Apollo asteroid type S [253]
Dactyl
Ida I
700 asteroid moon of 243 Ida [254]
Castalia
4769 		700 Apollo asteroid type S; contact binary [255]
2007 PA8
214869
675±70 Apollo asteroid type Q [256]
Moshup
66391
658.5±20 2490±54 Aten asteroid type S; binary [257] · [258]
1950 DA
29075
653 ≈ 2000 Apollo asteroid type S [259] · [260]
2006 HY51
394130 		609±114 Apollo asteroid [261]
Hartley 2
103P
570±80 ≈ 300 Jupiter-family comet [262] · [262]
2003 SD220
163899
515 Aten asteroid type S [263]
Nyx
3908
500±75 Amor asteroid type V [264]
2001 WN5
153814 		466±5.5 Apollo asteroid [265]
2017 YE5
450±25 Apollo asteroid type S; binary [266]
Ryugu
162173
432.5±7.5 ≈ 450 Apollo asteroid type Cg [267] · [268]
1997 AE12
162058
423.5±6.5 Amor asteroid type S [269]
2014 JO25
409 Apollo asteroid type S; contact binary [270]
Hermes
69230
400±50 Apollo asteroid type Sq [271]
Didymos
65803
390±4 527 Apollo asteroid type Xk; binary [272] · [273]
Aten
2062 		365±15 Aten asteroid type S [114]
Aegaeon
Saturn LIII
330±60 moon of Saturn [230]
2015 TB145
325±15 Apollo asteroid type S [274]
1994 CC
136617
310±30 266±32.9 Apollo asteroid type Sq; trinary [275] · [276]
2001 WR1
172034 		315.5±9 Amor asteroid type S [277]
Golevka
6489
265±15 Apollo asteroid type Q [278]
Bennu
101955
262.5±37.5 78±9 Apollo asteroid type B [279] · [280]
2000 WO107
153201
255±41.5 Aten asteroid type X [281]
2002 CU11
163132 		230±8.5 Apollo asteroid [282]
Squannit
Moshup I
225.5±13.5 asteroid moon of 66391 Moshup [258]
2014 HQ124
204.5±84 Aten asteroid type S [114]
2013 YP139
201±13 Apollo asteroid [283]
2008 EV5
341843
200±7 Aten asteroid type X/type C [124]
2006 DP14
388188
≈ 200 Apollo asteroid type S; contact binary [284]
1988 EG
6037 		199.5±1.35 Apollo asteroid type S [285]
2010 TK7
189.5±61.5 Aten asteroid; Earth trojan (L4) [286]
2006 SU49
292220 		≈ 188.5 ≈ 73 Apollo asteroid [287] · [287]
2005 YU55
308635
180±20 Apollo asteroid type C [288]
2010 SO16 178.5±63 Apollo asteroid; co-orbital with Earth [283]
Itokawa
25143
173 35.1±1.05 Apollo asteroid type S [289] · [289]
Apophis
99942
162.5±7.5 ≈ 61 Aten asteroid type Sq [290] · [291]
S/2009 S 1
≈ 150 moon of Saturn [292]
(277475) 2005 WK4
142 Apollo asteroid type S [293]
2004 BL86
357439
131.5±13 Apollo asteroid type V; binary [294]
2007 TU24
125 Apollo asteroid type S [295]
Zoozve
524522 		≈ 118 Aten asteroid type X; co-orbital with Venus [296]
2011 UW158
436724
110±20 Apollo asteroid type S [297]
Dimorphos
Didymos I 		85±15 asteroid moon of 65803 Didymos [273]
2017 BQ6
78 Apollo asteroid type S [298]
YORP
54509
61.8 Apollo asteroid type S [299]
Kamoʻoalewa
469219 		41 Apollo asteroid type S; quasi-satellite of Earth [300]
Duende
367943
23.75 Aten asteroid type L [301]
1998 KY26
≈ 15 Apollo asteroid type X [302]
2012 TC4
11.5 Apollo asteroid type E/type Xe [303]
2014 RC
≈ 11 Apollo asteroid type Sq [304]
2010 RF12 ≈ 3.5 ≈ 0.0005 Apollo asteroid [305]
2011 MD
3+2
−1 		Apollo asteroid/Amor asteroid type S [306]
2008 TC3
2.05 0.00008 Apollo asteroid type F/type M [307] · [307]
2023 BU 1.5 Apollo asteroid [308]
2008 TS26 ≈ 0.49 Apollo asteroid [309]
[edit]
Solar system planets, major moons, and 3 stars of different sizes are shown comparatively in three levels of zoom: one for the rocky planets, one for the gas giants, and one for the stars.
Largest moons of the Solar System to scale.

See also

[edit]

Notes

[edit]
  1. ^ a b c d e Radius estimated using equatorial radius and assuming body is spherical
  2. ^ a b Radius has been determined by various methods, such as optical (Hubble), thermal (Spitzer), or direct imaging via spacecraft
  3. ^ Calculated in Wolfram Alpha using semi axes of 1050 × 840 × 537 (Ellipsoid volume: 1.98395×10^9 km3)
  4. ^ Best fit, assuming Haumea is in hydrostatic equilibrium
  5. ^ a b c Radius estimated by using three radii and assuming body is spheroid
  6. ^ The mass estimate is based on the assumed density of 1.2 g/cm3, and a volume of 3.5 ×106 km3 obtained from a detailed shape model in Stooke (1994).[121]
  1. ^ a b c d e f g Name of body, including alternative names using Roman numerals to designate moons (such as "Saturn I" for Mimas), and numbers to designate minor planets
  2. ^ a b c d e f g Mean radius including uncertainties
  3. ^ Given as surface gravity (1 bar for gaseous planets)
  4. ^ Figures from default source Johnston's Archive—List of Known Trans-Neptunian Objects,[58] if otherwise not mentioned in the References column
  5. ^ a b c d e f Reference column specifically for radius (r) and mass (M) citations

References

[edit]
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Further reading

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