List of Solar System objects by size

(Redirected from List of Solar System objects by mass) Largest objects of the Solar System

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 10 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 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/cm, but it is just as likely that they have a comet-like density of only 0.5 g/cm.

For example, if a TNO is incorrectly assumed to have a mass of 3.59×10 kg based on a radius of 350 km with a density of 2 g/cm but is later discovered to have a radius of only 175 km with a density of 0.5 g/cm, its true mass would be only 1.12×10 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. 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.

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

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 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 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

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 and 2002 MS₄ have no known moons, directly determining their mass is impossible without sending a probe (estimated to be from 1.7x10 to 6.1×10 kg for Sedna).

Body	Image	Radius		Volume		Mass		Surface area		Density	Gravity		Type	Discovery
Body	Image	(km)	(R_🜨)	(10 km)	(V_🜨)	(10 kg)	(M_🜨)	(10 km)	🜨	(g/cm)	(m/s)	(🜨)	Type	Discovery
Sun		695700 ± ?	109.2	1,409,300,000	1,301,000	1989100000	333,000	6,078,700	11,918	1.409	274.0	27.94	G2V-class star	prehistoric
Jupiter		69911±6	10.97	1,431,280	1,321	1898187±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±13	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	86813±4	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	102413±5	17.147	7618.3	14.94	1.638±0.004	11.15	1.137	ice giant planet; has rings	1846
Earth		6371.0±0.0001	1	1,083.21	1	5972.4±0.3	1	510.06447	1	5.5136±0.0003	9.81	1	terrestrial planet	prehistoric
Venus		6051.8±1	0.9499	928.43	0.857	4867.5±0.2	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	641.71±0.03	0.107	144.37	0.283	3.9341±0.0007	3.71	0.379	terrestrial planet	prehistoric
Ganymede Jupiter III		2634.1±0.3	0.4135	76.30	0.0704	148.2	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	134.5	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	330.11±0.02	0.0553	74.797	0.147	5.4291±0.007	3.70	0.377	terrestrial planet	prehistoric
Callisto Jupiter IV		2410.3±1.5	0.3783	58.65	0.0541	107.6	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	1.854±0.006	0.620	0.063	dwarf planet; plutino; multiple	1930
Eris 136199		1163±6	0.1825	6.59	0.0061	16.6±0.2	0.0028	17	0.033	2.52±0.07	0.824	0.083	dwarf planet; SDO; binary	2003
Haumea 136108		798±6 to 816	0.12	1.98	0.0018	4.01±0.04	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		788.9±1.8	0.1237	2.06	0.0019	3.40±0.06	0.00059	7.82	0.015	1.711±0.005	0.378	0.0385	moon of Uranus	1787
Rhea Saturn V		763.8±1.0	0.1199	1.87	0.0017	2.307	0.00039	7.34	0.014	1.236±0.005	0.26	0.027	moon of Saturn	1672
Oberon Uranus IV		761.4±2.6	0.1195	1.85	0.0017	3.08±0.09	0.0005	7.285	0.014	1.63±0.05	0.347	0.035	moon of Uranus	1787
Iapetus Saturn VIII		735.6±1.5	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	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	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	0.009	1.70±0.02	0.288	0.0294	moon of Pluto	1978
Umbriel Uranus II		584.7±2.8	0.0918	0.837	0.0008	1.28±0.03	0.00020	4.3	0.008	1.39±0.16	0.234	0.024	moon of Uranus	1851
Ariel Uranus I		578.9±0.6	0.0909	0.813	0.0007	1.25±0.02	0.000226	4.211	0.008	1.66±0.15	0.269	0.027	moon of Uranus	1851
Dione Saturn IV		561.7±0.45	0.0881	0.741	0.0007	1.095	0.000183	3.965	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	0.0002	3.83	0.008	2.0±0.5	0.3	0.0306	dwarf planet; cubewano; binary; has rings	2002
Tethys Saturn III		533.0±0.7	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	0.938	0.000157	2.85	0.006	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	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		423±11	0.0664	0.373	0.0003	0.492±0.007	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/cm), implying that the objects retain significant internal porosity from their formation and were never gravitationally compressed into fully solid bodies.

Body	Radius (km)	Mass (10 kg)	Density (g/cm)	Type	Refs r · M
2002 MS₄ 307261	398±12	–	–	cubewano
2002 AW₁₉₇ 55565	384±19	–	–	cubewano
Varda 174567	373±8	245±6	1.23±0.04	cubewano; binary	·
2013 FY₂₇ 532037	370±40	–	–	SDO; binary
2003 AZ₈₄ 208996	362 ~ 386±6 (assuming HE)	150 ~ 210 (assuming HE)	0.76 ~ 0.87 (assuming HE)	plutino; binary
Ixion 28978	354.8±0.1	–	–	plutino
2004 GV₉ 90568	340±17	–	–	cubewano
2005 RN₄₃ 145452	340+28 −37	–	–	cubewano
Varuna 20000	327+77 −51	≈ 160	0.99+0.09 −0.02	cubewano
2002 UX₂₅ 55637	332±15	125±3	0.82±0.11	cubewano; binary	·
2005 RM₄₃ 145451	322	–	–	SDO
Gǃkúnǁʼhòmdímà 229762	321±14	136.1±3.3	1.02±0.17	SDO; binary	·
2014 UZ224	317.5+28.5 −30.5	–	–	SDO
2008 OG₁₉ 470599	309.5+28 −56.5	–	0.609±0.004	SDO	·
2007 JJ₄₃ 278361	305+85 −70	–	–	cubewano
Dysnomia Eris I	≈ 300; ≤ 370	300–500 < 140	1.8–2.4 < 1.2	moon of Eris
2010 KZ39	≈ 287	–	–	SDO
2014 EZ₅₁ 523692	> 288	–	–	SDO
2012 VP113	≈ 287	–	–	sednoid
2002 XW₉₃ 78799	283+36 −37	–	–	other TNO
2004 XR₁₉₀ 612911	≈ 278	–	–	SDO
2002 XV₉₃ 612533	275+11 −12	–	–	plutino
2015 RR245 523794	≈ 270	–	–	resonant KBO (2:9); binary
2003 UZ₄₁₃ 455502	≈ 268	–	–	plutino
Vesta 4	262.7±0.1	259	3.46	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)
2005 UQ₅₁₃ 202421	249+32 −38	–	–	cubewano
Miranda Uranus V	235.8±0.7	65.9±7.5	1.2±0.15	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
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	44	≈ 1.3	moon of Neptune	·
2005 QU₁₈₂ 303775	208±37	–	–	SDO
Chaos 19521	208+42 −15 equivalent	–	–	cubewano
2002 KX₁₄ 119951	207.5±0.5	–	–	cubewano
2001 QF₂₉₈ 469372	204+20 −22	–	–	plutino
Huya 38628	203±8	> 50	> 1.43	plutino; binary	·
2004 PF₁₁₅ 175113	203+49 −38	–	–	plutino
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). 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 10 kg to 10 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	Radius (km)	Mass (10 kg)	Type	Refs r · M
2004 UX₁₀ 144897	199±20	≈ 30	plutino	·
Mimas Saturn I	198.2±0.3	37.49±0.03	moon of Saturn	·
1998 SN₁₆₅ 35671	196±20		cubewano
2001 UR₁₆₃ 42301	≈ 176		resonant KBO (4:9)
Nereid Neptune II	170±25		moon of Neptune
1996 TL₆₆ 15874	170±10		SDO
2004 XA₁₉₂ 230965	170+60 −47.5		SDO
2002 WC₁₉ 119979	≈ 169	77±5	resonant KBO (1:2); binary	·
Interamnia 704	166±3	35.2±5.1	belt asteroid type F	·
Ilmarë Varda I	163±18		moon of 174567 Varda
Europa 52	160±2	23.9±3.8	belt asteroid type C
Hiʻiaka Haumea I	≈ 160	17.9±1.1	moon of Haumea	·
Davida 511	149±2	26.6±7.3	belt asteroid type C
2002 TX₃₀₀ 55636	143±5		cubewano
Actaea Salacia I	143±12		moon of 120347 Salacia
Sylvia 87	137±2	14.3±0.5	outer belt asteroid type X; trinary
Lempo 47171	136±9		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
Chariklo 10199	≈ 130		centaur; has rings
Juno 3	127±1	27.0±2.4	belt asteroid type S
Hiisi Lempo II	126±8		secondary of 47171 Lempo
Hektor 624	125±13	7.9±1.4	Jupiter trojan (L₄) type D; binary	·
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		belt asteroid type S
S/2007 (148780) 1 Altjira I	110+17 −62		secondary of 148780 Altjira
Hesperia 69	110±15	5.86±1.18	belt asteroid type M	·
Thisbe 88	109±2	11.6±2.2	belt asteroid type B
Doris 48	108±2	6.9±2.9	belt asteroid type C
Chiron 2060 or 95P	108±5		centaur; has rings
Phoebe Saturn IX	106.5±0.7	8.29±0.01	moon of Saturn	·
S/2012 (38628) 1 Huya I	106±15		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	Radius (km)	Mass (10 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
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	·
S/2018 (532037) 1	≈ 95		moon of 2013 FY27
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	6.2±3.6	belt asteroid type C	·
Bertha 154	93.4±0.9	9.2±5.2	belt asteroid type C	·
Janus Saturn X	89.5±1.4	1.898±0.001	moon of Saturn	·
Teharonhiawako 88611	89+16 −18	2.44±0.03	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	·
Phorcys Ceto I	87+8 −9	≈ 1.67	secondary of 65489 Ceto	·
Palma 372	86.8±1.4	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	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	·
Namaka Haumea II	≈ 85	1.8±1.5	moon of Haumea	·
Weywot Quaoar I	≈ 85	< ≈ 5	moon of 50000 Quaoar
Freia 76	84.2±1.0	2.0±4.2	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
Nemesis 128	81.5±2.5	3.4±1.7	belt asteroid type C
Puck Uranus XV	81±2		moon of Uranus
S/2015 (136472) 1 Makemake I	≈ 80		moon of Makemake
Sycorax Uranus XVII	78.5+11.5 −7.5		moon of Uranus
Io 85	77.4±1.9	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	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
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	·
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
Aglaja 47	71±4	3.2±1.7	belt asteroid type C	·
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	·
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	·
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	·
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
Leleākūhonua 541132	55+7 −5		sednoid
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 ×10 kg to ×10 kg (Eg). Most mass values of asteroids are assumed.

Body	Radius (km)	Mass (10 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	Radius (km)	Mass (10 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
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
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
S/2019 (31) 1 Euphrosyne I	3.35±1.2		asteroid moon of 31 Euphrosyne
Tempel 1 9P	3±0.1		Jupiter-family comet; Deep Impact flyby and impacted
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
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 (moon) Jupiter XLVI	1.44		Moon of Jupiter
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 Esclangona I	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

Below 1 km

Body	Radius (m)	Mass (10 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
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
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	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	·
2000 WO₁₀₇ 153201	255±41.5		Aten asteroid type X
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	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	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
(277475) 2005 WK4	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
YORP 54509	61.8		Apollo asteroid type S
Kamoʻoalewa 469219	41		Apollo asteroid type S; quasi-satellite of Earth
Duende 367943	23.75		Aten asteroid type L
1998 KY26	≈ 15		Apollo asteroid type X
2012 TC4	11.5		Apollo asteroid type E/type Xe
2014 RC	≈ 11		Apollo asteroid type Sq
2010 RF12	≈ 3.5	≈ 0.0005	Apollo asteroid
2011 MD	3+2 −1		Apollo asteroid/Amor asteroid type S
2008 TC3	2.05	0.00008	Apollo asteroid type F/type M	·
2023 BU	1.5		Apollo asteroid
2008 TS26	≈ 0.49		Apollo asteroid

Gallery

Notes

^ Radius estimated using equatorial radius and assuming body is spherical
^ Radius has been determined by various methods, such as optical (Hubble), thermal (Spitzer), or direct imaging via spacecraft
Calculated in Wolfram Alpha using semi axes of 1050 × 840 × 537 (Ellipsoid volume: 1.98395×10^9 km)
Best fit, assuming Haumea is in hydrostatic equilibrium
^ Radius estimated by using three radii and assuming body is spheroid
The mass estimate is based on the assumed density of 1.2 g/cm, and a volume of 3.5 ×10 km obtained from a detailed shape model in Stooke (1994).

^ Name of body, including alternative names using Roman numerals to designate moons (such as "Saturn I" for Mimas), and numbers to designate minor planets
^ Mean radius including uncertainties
Given as surface gravity (1 bar for gaseous planets)
Figures from default source Johnston's Archive—List of Known Trans-Neptunian Objects, if otherwise not mentioned in the References column
^ Reference column specifically for radius (r) and mass (M) citations

References

Brown, M. "The Dwarf Planets". Caltech. Archived from the original on 2011-01-16. Retrieved 2008-09-25.
"Iapetus' peerless equatorial ridge". The Planetary Society. Retrieved 2020-01-04.
"Gǃkúnǁʼhòmdímà and Gǃòʼé ǃhú" (PDF). .lowell.edu. Archived from the original on 2019-04-07. Retrieved 2020-01-04.
Britt, D. T.; Consolmagno, G. J.; Merline, W. J. (2006). "Small Body Density and Porosity: New Data, New Insights" (PDF). Lunar and Planetary Science XXXVII. Archived from the original (PDF) on 2008-12-17. Retrieved 2008-12-16.
^ "Planetary Satellite Physical Parameters". JPL (Solar System Dynamics). 2008-10-24. Retrieved 2008-12-16.
Williams, D. R. (2007-11-23). "Uranian Satellite Fact Sheet". NASA (National Space Science Data Center). Archived from the original on 2010-01-05. Retrieved 2008-12-12.
^ Brown, Michael E. "How many dwarf planets are there in the outer solar system?". California Institute of Technology. Retrieved 28 April 2019.
Park, R. S.; Konopliv, A. S.; Bills, B. G.; Rambaux, N.; Castillo-Rogez, J. C.; Raymond, C. A.; Vaughan, A. T.; Ermakov, A. I.; Zuber, M. T.; Fu, R. R.; Toplis, M. J.; Russell, C. T.; Nathues, A.; Preusker, F. (2016). "A partially differentiated interior for (1) Ceres deduced from its gravity field and shape". Nature. 537 (7621): 515–517. Bibcode:2016Natur.537..515P. doi:10.1038/nature18955. PMID 27487219. S2CID 4459985.
"Iapetus' peerless equatorial ridge".
^ Grundy, W.M.; Noll, K.S.; Buie, M.W.; Benecchi, S.D.; Ragozzine, D.; Roe, H.G. (December 2019). "The mutual orbit, mass, and density of transneptunian binary Gǃkúnǁʼhòmdímà ((229762) 2007 UK₁₂₆)" (PDF). Icarus. 334: 30–38. doi:10.1016/j.icarus.2018.12.037. S2CID 126574999. Archived from the original (PDF) on 2019-04-07.
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