List of Solar System objects by size
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Template:Lists of Solar System objects This is a partial list of Solar System objects by size, arranged in descending order of mean volumetric radius, and divided into several size classes. These lists can also be sorted according to an object's mass and, for the largest objects, volume, density and surface gravity, insofar as these values are available. This list contains the Sun, the planets, dwarf planets, many of the larger small Solar System bodies (which includes the asteroids), all named natural satellites, and a number of smaller objects of historical or scientific interest, such as comets and near-Earth objects.
Objects on this list are ordered by mean radius rather than mass; thus, objects on the lower portions of the table can be more massive than objects higher on the list if they have a higher density.
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.
Solar System objects more massive than 1021 kilograms (one yottagram [Yg]) are known or expected to be approximately spherical. Astronomical bodies relax into rounded shapes (ellipsoids), achieving hydrostatic equilibrium, when 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 400-1000 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
-
Relative masses of the bodies of the Solar System. Objects smaller than Saturn are not visible at this scale.
List of objects by mean radius
Larger than 400 km
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] Earth's moon (r = 1,737 km) is also not in hydrostatic equilibrium, but—unlike icy Ceres and Iapetus—it is composed primarily of silicate rock, which has a much higher tensile strength than ice.
For simplicity and comparative purposes, the values are manually calculated assuming a sphericity of 1. The size of solid bodies does not include an object's atmosphere. For example, Titan looks bigger than Ganymede, but its solid body is smaller. For the giant planets, the "radius" is defined as the distance from the center at which the atmosphere reaches 1 bar of atmospheric pressure.[10] The radius of Saturn's main rings is 136,775 km.
Body[note 1] | Image | Radius[note 2] | Volume | Mass | Density | Gravity[note 3] | Type | Shape | # [note 4] |
Discovery | ||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
(km) | (R⊕) | (109 km3) | (V⊕) | (1021 kg) | (M⊕) | (g/cm3) | (m/s2) | (⊕) | ||||||
Sun | 696342±65[11] | 109.3 | 1,414,300,000 | 1,305,700 | 1988500000 | 333,000 | 1.408 | 274.0 | 27.94 | star | round | 1 | - | |
Jupiter | 69911±6 | 10.97 | 1,431,280 | 1,321 | 1898200 ±? | 317.83 | 1.326 | 24.79 | 2.528 | planet (gas giant); has rings | round | 2 | - | |
Saturn | 58232±6 (w/o rings) |
9.140 | 827,130 | 764 | 568340 ±? | 95.162 | 0.687 | 10.445 | 1.065 | planet (gas giant); has rings | round | 3 | - | |
Uranus | 25362±7 | 3.981 | 68,340 | 63.1 | 86813 ±? | 14.536 | 1.27 | 8.69 | 0.886 | planet (ice giant); has rings | round | 4 | 1781 | |
Neptune | 24622±19 | 3.865 | 62,540 | 57.7 | 102413±? | 17.147 | 1.638 | 11.15 | 1.137 | planet (ice giant); has rings | round | 5 | 1846 | |
Earth | 6371.00 | 1 | 1,083.21 | 1 | 5972.4 | 1 | 5.514 | 9.80665 | 1 | planet (terrestrial) | round | 6 | - | |
Venus | 6051.8±1.0 (w/o gas) |
0.9499 | 928.43 | 0.857 | 4867.5 | 0.815 | 5.243 | 8.872 | 0.905 | planet (terrestrial) | round | 7 | - | |
Mars | 3389.5±0.2 | 0.5320 | 163.18 | 0.151 | 641.7 | 0.107 | 3.9335 ± 0.0004 | 3.721 | 0.379 | planet (terrestrial) | round | 8 | - | |
Ganymede Jupiter III |
2634.1±0.3 | 0.4135 | 76.30 | 0.0704 | 148.2 | 0.0248 | 1.936 | 1.428 | 0.146 | moon of Jupiter | round | 9 | 1610 | |
Titan Saturn VI |
2574.73±0.09 (w/o gas)[a] |
0.4037[a] | 71.50 | 0.0658 | 134.5 | 0.0225 | 1.8798 ± 0.0044 | 1.354 | 0.138 | moon of Saturn | round | 10 | 1655 | |
Mercury | 2439.7±1.0 | 0.3829 | 60.83 | 0.0562 | 330.1 | 0.0553 | 5.427 | 3.7 | 0.377 | planet (terrestrial) | round | 11 | - | |
Callisto Jupiter IV |
2410.3±1.5 | 0.3783 | 58.65 | 0.0541 | 107.6 | 0.018 | 1.8344 ± 0.0034 | 1.23603 | 0.126 | moon of Jupiter | round | 12 | 1610 | |
Io Jupiter I |
1821.6±0.5 | 0.2859 | 25.32 | 0.0234 | 89.32 | 0.015 | 3.528 ± 0.006 | 1.797 | 0.183 | moon of Jupiter | round | 13 | 1610 | |
Moon (Luna) Earth I |
1737.4 | 0.2727 | 21.958 | 0.0203 | 73.42 | 0.0123 | 3.3464 | 1.625 | 0.166 | moon of Earth | round | 14 | - | |
Europa Jupiter II |
1560.8±0.5 | 0.2450 | 15.93 | 0.0147 | 48.00 | 0.008035 | 3.013 ± 0.005 | 1.316 | 0.134 | moon of Jupiter | round | 15 | 1610 | |
Triton Neptune I |
1353.4±0.9[a] | 0.2124[a] | 10.38 | 0.0096 | 21.39±0.03 | 0.003599 | 2.061 | 0.782 | 0.0797 | moon of Neptune | round | 16 | 1846 | |
Pluto 134340 |
1188.3±0.8[12] | 0.186 | 7.057 | 0.00651 | 13.0±0.03[13] | 0.0028 | 1.854 ± 0.006 | 0.084 | dwarf planet; plutino; multiple | round | 17 | 1930 | ||
Eris 136199 |
1163±6[b][14] | 0.1825[b] | 6.59 | 0.0061 | 16.6±0.2[15] | 0.0022 | 1.885 ± 0.006 | 0.824 | 0.062 | dwarf planet; SDO; binary | round | 18 | 2003 | |
Titania Uranus III |
788.4±0.6[c] | 0.1237[c] | 2.06 | 0.0019 | 3.40±0.06 | 0.00059 | 1.711 ± 0.005 | 0.378 | 0.0385 | moon of Uranus | round | 20 | 1787 | |
Haumea 136108 |
780[16][d] | 0.12 | 1.98[e] | 0.0018 | 4.01±0.04[17] | 0.00066 | 2.018[16][d] | 0.401 | 0.0409 | dwarf planet?; resonant KBO (7:12); trinary; has rings |
round (scalene ellipsoid) |
19 | 2004 | |
Rhea Saturn V |
763.8±1.0[c] | 0.1199[c] | 1.87 | 0.0017 | 2.307 | 0.00039 | 1.236 ± 0.005 | 0.26 | 0.027 | moon of Saturn | round | 21 | 1672 | |
Oberon Uranus IV |
761.4±2.6[a] | 0.1195[a] | 1.85 | 0.0017 | 3.08±0.09 | 0.0005 | 1.63 ± 0.05 | 0.347 | 0.035 | moon of Uranus | round | 22 | 1787 | |
Iapetus Saturn VIII |
734.5±2.8 | 0.1153 | 1.66 | 0.0015 | 1.806 | 0.00033 | 1.088 ± 0.013 | 0.223 | 0.0227 | moon of Saturn | round | 23 | 1671 | |
Makemake 136472 |
715+19 −11[18] |
0.112 | 1.53 | 0.0014 | ≈ 3.1 | 0.00053 | 1.95 | 0.57 | 0.0581 | dwarf planet?; cubewano | round | 24 | 2005 | |
Gonggong 225088 |
615±25[19] | 0.0983 | 1.03 | 0.0009 | 1.75±0.07 | 0.00029 | 1.72 ± 0.16 | 0.3 | 0.0306 | dwarf planet?; resonant SDO (3:10) | round | 25 | 2007 | |
Charon Pluto I |
606±0.5 | 0.0951 | 0.932 | 0.0009 | 1.586±0.015 | 0.00025 | 1.702 ± 0.021 | 0.288 | 0.0294 | moon of Pluto | round | 26 | 1978 | |
Umbriel Uranus II |
584.7±2.8 | 0.0918 | 0.837 | 0.0008 | 1.28±0.03 | 0.00020 | 1.39 ± 0.16 | 0.234 | 0.024 | moon of Uranus | round | 27 | 1851 | |
Ariel Uranus I |
578.9±0.6 | 0.0909 | 0.813 | 0.0007 | 1.25±0.02 | 0.000226 | 1.66 ± 0.15 | 0.269 | 0.027 | moon of Uranus | round | 28 | 1851 | |
Dione Saturn IV |
561.4±0.4 | 0.0881 | 0.741 | 0.0007 | 1.095 | 0.000183 | 1.478 ± 0.003 | 0.232 | 0.0237 | moon of Saturn | round | 29 | 1684 | |
Quaoar 50000 |
560.5±0.6 | 0.0879 | 0.737 | 0.0007 | 1.4±0.2 | 0.0002 | 1.99 ± 0.46[20] | 0.3 | 0.0306 | cubewano; binary | round[20] | 30 | 2002 | |
Tethys Saturn III |
531.1±0.6 | 0.0834 | 0.624 | 0.0006 | 0.617 | 0.000103 | 0.984 ± 0.003[21] | 0.145 | 0.015 | moon of Saturn | round | 31 | 1684 | |
Sedna 90377 |
498±40 | 0.0785 | 0.516 | 0.0005 | ? | sednoid; detached object | unknown | 32 | 2003 | |||||
Ceres 1 |
469.7±0.1[22] | 0.0742 | 0.433 | 0.0004 | 0.938[23] | 0.000157 | 2.17 | 0.28 | 0.029 | dwarf planet; belt asteroid | round | 33 | 1801 | |
Orcus 90482 |
458±13 | 0.0719 | 0.404 | 0.0004 | 0.61±0.04 | 0.0001 | 1.53 ± 0.14 | 0.2 | 0.0204 | plutino; binary | unknown | 34 | 2004 | |
Salacia 120347 |
423±11 | 0.0664 | 0.3729 | 0.0003 | 0.492±0.007[24] | 0.000082 | 1.5 ± 0.12[24] | 0.165 | 0.0168 | cubewano; binary | unknown | 35 | 2004 | |
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.[25] 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.[26]
Body[note 1] | Image | Radius[note 2] (km) |
Mass (1020 kg) |
Density (g/cm3) |
Type[note 5] | Remarks – shape[note 5] | Refs[note 6] r · M | ||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Varda 174567 |
384±8 | 2.664±0.064 | 1.24+0.5 −0.35 |
cubewano; binary | Maclaurin spheroid[28] | [28] · [29] | |||||||
2002 AW197 55565 |
384±19 | – | – | cubewano | – | [29] · M | |||||||
2002 MS4 307261 |
≈ 383 | – | – | cubewano | oblate spheroid?[30] | [30] · M | |||||||
2013 FY27 532037 |
370+45 −43 |
– | – | detached object; binary | – | [31] · M | |||||||
2003 AZ84 208996 |
353±12 | – | 0.87±0.01 | plutino; possible binary | scalene ellipsoid[32] | [32] · M | |||||||
Dysnomia Eris I |
350±58 | – | – | moon of Eris | – | [33] · M | |||||||
2004 GV9 90568 |
340±17 | – | – | cubewano | – | [34] · M | |||||||
2005 RN43 145452 |
340+28 −37 |
– | – | cubewano | – | [34] · M | |||||||
Varuna 20000 |
334+77 −43 |
≈ 1.6 | 0.99 | cubewano | scalene ellipsoid | [35] · [36] | |||||||
2002 UX25 55637 |
332±15 | 1.25±0.03 | 0.82±0.11 | cubewano; binary | likely non-spherical[26] | [37] · [38] | |||||||
2018 VG18 | ≈ 328 | – | – | SDO | – | [7] · M | |||||||
Gǃkúnǁʼhòmdímà 229762 |
321±14 | 1.361±0.033 | 1.02±0.17 | SDO; binary | likely non-spherical[39] | [39] · [26] | |||||||
2014 UZ224 | 318+16 −20 |
– | – | SDO | – | [40] · M | |||||||
2014 EZ51 523692 |
≈ 313 | – | – | SDO | – | [7] · M | |||||||
2015 RR245 523794 |
≈ 313 | – | – | resonant KBO (2:9) | binary; may be smaller | [41] · M | |||||||
2008 OG19 470599 |
309.5+28 −56.5 |
– | 0.609±0.004 | SDO | scalene ellipsoid[42] | [42] · [42] | |||||||
Ixion 28978 |
308.5±10 | – | – | plutino | – | [43] · M | |||||||
2010 RF43 | ≈ 306 | – | – | SDO | – | [7] · M | |||||||
2006 QH181 | ≈ 304 | – | – | resonant SDO (3:10) | – | [27] · M | |||||||
Chaos 19521 |
300+70 −65 |
– | – | cubewano | – | [34] · M | |||||||
2010 JO179 | ≈ 299 | – | – | resonant SDO (5:21) | – | [7] · M | |||||||
2012 VP113 | ≈ 299 | – | – | sednoid | – | [7] · M | |||||||
2010 KZ39 | ≈ 299 | – | – | detached | – | [7] · M | |||||||
2002 TC302 84522 |
292+53 −44 |
– | – | resonant SDO (2:5) | – | [37] · M | |||||||
2014 AN55 543354 |
≈ 292 | – | – | SDO | – | [7] · M | |||||||
2002 XW93 78799 |
283+36 −37 |
– | – | other TNO | – | [44] · M | |||||||
2004 XR190 | ≈ 278 | – | – | SDO | – | [7] · M | |||||||
2002 XV93 | 275+11 −12 |
– | – | plutino | – | [45] · M | |||||||
2003 VS2 84922 |
274+15 −22 |
– | > 0.7 | plutino | scalene ellipsoid; non-equilibrium shape[46] | [46] · [46] | |||||||
2005 RM43 145451 |
≈ 272 | – | ≈ 0.56 | SDO | – | [7] · [27] | |||||||
2010 RE64 523639 |
≈ 272 | – | – | SDO | – | [7] · M | |||||||
2014 WK509 523759 |
≈ 272 | – | – | SDO | – | [7] · M | |||||||
2008 ST291 528381 |
≈ 272 | – | – | resonant SDO (1:6) | – | [7] · M | |||||||
2013 FZ27 523671 |
≈ 272 | – | – | SDO | – | [7] · M | |||||||
2003 UZ413 455502 |
≈ 268 | – | ≈ 2.64 | plutino | likely scalene ellipsoid[47] | [7] · [47] | |||||||
2017 OF69 | ≈ 266 | – | – | plutino | – | [27] · M | |||||||
2007 JJ43 278361 |
≈265 | – | – | cubewano | – | [48] · M | |||||||
Vesta 4 |
262.7±0.1 | 2.59 | 3.46 | belt asteroid type V | formerly round (not in hydrostatic equilibrium: frozen-in ellipsoidal shape and large impact basins)[49][50] | [51] · [51] | |||||||
2014 FC69 | ≈ 259 | – | – | SDO | – | [7] · M | |||||||
2014 YA50 | ≈ 259 | – | – | plutino | – | [7] · M | |||||||
Pallas 2 |
256±3 | 2.11±0.26 | 3.0±0.5 | belt asteroid type B | irregular, borderline[52] | [52] · [53] | |||||||
2004 TY364 120348 |
256+19 −20 |
– | – | cubewano | – | [43] · M | |||||||
2014 FC72 | ≈ 253 | – | – | SDO | – | [27] · M | |||||||
2008 AP129 315530 |
≈ 253 | – | – | cubewano | – | [7] · M | |||||||
2014 UM33 472271 |
≈ 253 | – | – | cubewano | – | [7] · M | |||||||
2010 FX86 | ≈ 253 | – | – | cubewano | – | [7] · M | |||||||
Enceladus Saturn II |
252.1±0.2 | 1.08±0.001 | 1.609±0.005 | moon of Saturn | round (not in hydrostatic equilibrium: frozen-in ellipsoidal shape) | [54] · [55] | |||||||
2005 UQ513 202421 |
249+32 −38 |
– | – | cubewano | – | [29] · M | |||||||
2010 VZ98 445473 |
≈ 247 | – | – | SDO | – | [7] · M | |||||||
2015 AM281 495603 |
≈ 247 | – | – | resonant KBO (2:5) | – | [7] · M | |||||||
2010 VK201 523645 |
≈ 236 | – | – | cubewano | – | [7] · M | |||||||
2011 FW62 2015 AJ281 |
≈ 236 | – | – | plutino | – | [7] · M | |||||||
Miranda Uranus V |
235.8±0.7 | 0.659±0.075 | 1.2±0.15 | moon of Uranus | round | [56] · [57] | |||||||
Dziewanna 471143 |
235+18 −5 |
– | – | SDO | – | [58] · M | |||||||
2005 TB190 145480 |
232±31 | – | – | detached object | – | [33] · M | |||||||
1999 DE9 26375 |
231±23 | – | – | resonant SDO (2:5) | – | [59] · M | |||||||
2003 FY128 120132 |
230±11 | – | – | SDO | – | [33] · M | |||||||
2011 GM27 471288 |
≈ 230 | – | – | cubewano | – | [7] · M | |||||||
2003 QX113 | ≈ 230 | – | – | SDO | – | [7] · M | |||||||
2002 VR128 84719 |
224+24 −22 |
– | – | plutino | – | [45] · M | |||||||
Vanth Orcus I |
221.3±5.1 | ≈ 0.7 | ≈ 1.5 | moon of 90482 Orcus | – | [60] · [60] | |||||||
Hygiea 10 |
217±7 | 0.832±0.08 | 1.944±0.25 | belt asteroid type C | round | [61] · [61] | |||||||
2003 QX111 | ≈ 217 | – | – | SDO | – | [27] · M | |||||||
2004 NT33 444030 |
212+44 −40 |
– | – | cubewano | – | [29] · M | |||||||
Proteus Neptune VIII |
210±7 | 0.44 | ≈ 1.3 | moon of Neptune | irregular; borderline | [5] · [5] | |||||||
2005 QU182 303775 |
208±37 | – | – | SDO | – | [33] · M | |||||||
2002 KX14 119951 |
207.5±0.5 | – | – | cubewano | – | [62] · M | |||||||
2001 QF298 469372 |
204+20 −22 |
– | – | plutino | – | [45] · M | |||||||
Huya 38628 |
203±8 | > 0.5 | > 1.43 | plutino; binary | – | [37] · [63] | |||||||
2004 PF115 175113 |
203+49 −38 |
– | – | plutino | – | [45] · M | |||||||
Legend:
|
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 lie above the boundary for hydrostatic equilibrium, 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).[64] Many TNOs are omitted from this list as their sizes are poorly known.[27]
Body[note 1] | Image | Radius[note 2] (km) |
Mass (1018 kg) |
Type | Remarks – shape | Refs[note 6] r · M |
---|---|---|---|---|---|---|
2004 UX10 144897 |
199±19.5 | ≈ 30 | plutino | – | [45] · [65] | |
Mimas Saturn I |
198.2±0.4 | 37.49±0.03 | moon of Saturn | round (smallest body currently known to have an ellipsoidal shape, but not in hydrostatic equilibrium) | [54] · [55] | |
1998 SN165 35671 |
196.5±19.5 | cubewano | – | [29] · M | ||
Nereid Neptune II |
178.5±6.5 | moon of Neptune | probably irregular in shape[66] | [66] · M | ||
2001 UR163 42301 |
≈ 176 | resonant KBO (4:9) | – | [27] · M | ||
1996 TL66 15874 |
169.5±10 | SDO | – | [33] · M | ||
2004 XA192 230965 |
169.5+60 −47.5 |
SDO | – | [45] · M | ||
2002 WC19 119979 |
≈ 169 | 77±5.34 | resonant KBO (1:2); binary | – | [67] · [67] | |
Interamnia 704 |
166±3 | 37.9±12.8 | belt asteroid type F | scalene ellipsoid; likely in hydrostatic equilibrium[68] | [68] · [68] | |
Ilmarë Varda I |
163+19 −17 |
moon of 174567 Varda | – | [69] · M | ||
Hiʻiaka Haumea I |
≈ 160 | 17.9±1.1 | moon of Haumea | probably irregular in shape[70] | [17] · [17] | |
2010 TY53 | ≈ 158 | extended centaur | – | [7] · M | ||
2010 TJ | ≈ 158 | SDO | – | [7] · M | ||
1999 CD158 469306 |
≈ 155 | > 12.5 | resonant KBO (4:7) | – | [27] · [27] | |
Europa 52 |
152.0±1.8 | 23.8±5.8 | belt asteroid type C | irregular shape[71] | [72] · [73] | |
2004 EW95 120216 |
145.5 | plutino | – | [27] · M | ||
Davida 511 |
145.2±1.1 | 33.8±10.2 | belt asteroid type C | irregular shape | [74] · [73] | |
2002 TX300 55636 |
143±5 | cubewano; Haumea family | – | [75] · M | ||
Sylvia 87 |
143±5.5 | 14.78±0.06 | outer belt asteroid type X; trinary | irregular shape[71] | [76] · [77] | |
Actaea Salacia I |
143±12 | moon of 120347 Salacia | – | [78] · M | ||
1995 SN55 | ≈ 139 | Lost centaur or transient TNO | – | [7] · M | ||
Hyperion Saturn VII |
138.6±4 | 5.62±0.05 | moon of Saturn | irregular shape | [25] · [25] | |
Lempo 47171 |
136+8.5 −9.5 |
plutino; trinary | – | [79] · M | ||
1998 SM165 26308 |
134±14 | 6.87±1.8 | resonant KBO (1:2) | irregular shape | [80] · [80] | |
Euphrosyne 31 |
133.5±1.3 | 12.7±6.5 | belt asteroid type C; binary | irregular shape | [72] · [73] | |
Chariklo 10199 |
≈ 130 | centaur | has rings | [81] · M | ||
Eunomia 15 |
128.2±1.5 | 31.4±1.8 | belt asteroid type S | irregular shape[71] | [82] · [73] | |
2005 RR43 145453 |
≈ 126 | ≈ 14.6 | cubewano; Haumea family | – | [83] · [27] | |
Hiisi Lempo II |
125.5+8 −8.5 |
secondary of 47171 Lempo | – | [79] · M | ||
Hektor 624 |
125±13 | 7.9±1.4 | Jupiter trojan (L4) type D; binary | irregular shape; contact binary | [84] · [84] | |
Sila 79360 |
124.5+15 −15.5 |
10.8±0.22 | cubewano; binary | – | [85] · M | |
2007 RW10 309239 |
123.5±15 | quasi-satellite of Neptune | – | [33] · M | ||
Juno 3 |
123.3±5.9 | 27.3±2.9 | belt asteroid type S | irregular shape[71] | [86] · [73] | |
Altjira 148780 |
123+19 −70 |
cubewano; binary | – | [29] · M | ||
Cybele 65 |
118.6±2.1 | 13.6±3.1 | outer belt asteroid type C | irregular shape | [87] · [73] | |
Nunam 79360 |
118+14 −15 |
secondary of 79360 Sila | – | [85] · M | ||
2001 QC298 | 118+10 −12 |
11.88±0.14 | cubewano; binary | – | [29] · [29] | |
Psyche 16 |
≈ 117 | 24.1±3.2 | belt asteroid type M | irregular shape | [88] · [89] | |
Patientia 451 |
112.9±2.3 | 10.9±5.3 | belt asteroid type C | irregular shape | [86] · [73] | |
2014 NW65 523727 |
≈ 112.5 | centaur | – | [7] · M | ||
Ceto 65489 |
111.5±5 | 5.4±0.4 | extended centaur; binary | – | [33] · [90] | |
2001 FP185 82158 |
≈ 111 | SDO | – | [91] · M | ||
Herculina 532 |
111.2±2.4 | belt asteroid type S | irregular shape[71] | [87] · M | ||
S/2007 (148780) 1 Altjira I |
110.5+17 −62.5 |
secondary of 148780 Altjira | – | [29] · M | ||
Bamberga 324 |
110.35±0.72 | 10±1 | belt asteroid type C | irregular shape | [86] · [73] | |
Doris 48 |
108.2±2.4 | 6.1±3.0 | belt asteroid type C | irregular shape | [86] · [73] | |
2000 YW134 82075 |
≈ 108 | resonant SDO (3:8); binary[27] | – | [27] · M | ||
Chiron 2060 or 95P |
108±5 | centaur | has rings | [37] · M | ||
Egeria 13 |
107±6 | 8.8±4.2 | belt asteroid type G | irregular shape | [73] · [73] | |
Iris 7 |
107±2.5 | 13.8±1.3 | belt asteroid type S | irregular shape | [92] · [92] | |
Phoebe Saturn IX |
106.6±0.8 | 8.29±0.01 | moon of Saturn | formerly round[93] | [25] · [25] | |
S/2012 (38628) 1 Huya I |
106±15 | moon of 38628 Huya | – | [37] · M | ||
Deucalion 53311 |
≈ 106 | cubewano | – | [27] · M | ||
2015 TH367 | ≈ 106 | centaur | – | [7] · M | ||
Camilla 107 |
105±4 | 11.2±0.3 | outer belt asteroid type C; trinary | irregular shape[94] | [86] · [73] | |
Fortuna 19 |
103±3 | 8.6±1.5 | belt asteroid type G | irregular shape | [73] · [73] | |
Thisbe 88 |
102±5 | 15.3±3.1 | belt asteroid type B | irregular shape[94] | [73] · [73] | |
Eugenia 45 |
101±1 | 5.7±0.1 | belt asteroid type F; trinary | irregular shape[71] | [86] · [95] | |
Legend:
|
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.[27] Asteroid spectral types are mostly Tholen, but some might be SMASS.
Body[note 1] | Image | Radius[note 2] (km) |
Mass (1018 kg) |
Type – notes | Refs[note 6] r · M |
---|---|---|---|---|---|
Chicago 334 |
99.4±2.8 | 5.1±5.6 | belt asteroid type C | [86] · [73] | |
Bienor 54598 |
99+3 −3.5 |
centaur | [96] · M | ||
Themis 24 |
98±2 | 5.9±1.9 | belt asteroid type C; Themis family | [86] · [73] | |
Larissa Neptune VII |
97±5[dubious – discuss] | ≈ 4.2 | moon of Neptune | [97] · [f] | |
Ursula 375 |
96.8±1.3[dubious – discuss] | 8.4±5.3 | belt asteroid type C | [82] · [73] | |
S/2002 (2001 QC298) 1 2001 QC298 I |
96+9 −10 |
secondary of 2001 QC298 | [29] · M | ||
S/2018 (532037) 1 2013 FY27 I |
≈ 95 | moon of (532037) 2013 FY27 | [31] · M | ||
Amphitrite 29 |
94.8±0.6 | 13±2[dubious – discuss] | belt asteroid type S | [86] · [73] | |
Daphne 41 |
94.5±0.5 | 6.3±0.1 | belt asteroid type C; binary | [99] · [73] | |
Aurora 94 |
93.8±3.6[dubious – discuss] | 6.2±3.6 | belt asteroid type C | [74] · [73] | |
Hermione 121 |
94±3 | 5.0±0.3 | outer belt asteroid type C; binary | [100] · [73] | |
Bertha 154 |
93.4±0.9 | 9.2±5.2[dubious – discuss] | belt asteroid type C | [73] · [73] | |
Hebe 6 |
92.6±1.4 | 14±1[dubious – discuss] | belt asteroid type S | [87] · [73] | |
Metis 9 |
≈ 92 | 8.4±1.7 | belt asteroid type S | [86] · [73] | |
Elektra 130 |
90.3±1.3 | 6.6±0.4 | belt asteroid type G; trinary | [86] · [101] | |
Loreley 165 |
90±1 | ≈ 19±2 | belt asteroid type C | [86] · [73] | |
Janus Saturn X |
89.5±1.4 | 1.898±0.001 | moon of Saturn | [25] · [25] | |
Teharonhiawako 88611 |
89+16 −18 |
2.44±0.03[dubious – discuss] | cubewano; binary | [29] · [102] | |
Nemesis 128 |
89±1[dubious – discuss] | 6.0±2.6 | belt asteroid type C | [82] · [73] | |
Aegle 96 |
88.9±0.8 | 6.4±6.3 | belt asteroid type T | [86] · [73] | |
Diotima 423 |
88±32 | 6.9±1.9 | belt asteroid type C | [86] · [73] | |
S/2015 (136472) 1 Makemake I |
≈ 87.5 | moon of Makemake | [103] · M | ||
Galatea Neptune VI |
87.4±4.9 | 2.12±0.08 | moon of Neptune | [97] · [104] | |
Aletheia 259 |
87.2±0.5 | 7.8±0.4 | belt asteroid type CP/type X | [86] · [73] | |
Phorcys Ceto I |
87+8 −9 |
≈ 1.67 | secondary of 65489 Ceto | [90] · [90] | |
Palma 372 |
86.8±1.4[dubious – discuss] | 5.2±0.6 | belt asteroid type B | [72] · [73] | |
Alauda 702 |
86±28 | 6.06±0.36[dubious – discuss] | belt asteroid type C; binary | [72] · [105] | |
Winchester 747 |
85.9±1.6 | 3.8±2.2 | belt asteroid type C | [87] · [73] | |
Aspasia 409 |
85.5±0.6 | 11.8±2.3 | belt asteroid type C | [86] · [73] | |
Hilda 153 |
85.3±1.6 | outer belt asteroid; Hildas | [87] · M | ||
Pretoria 790 |
85.2±1.3[dubious – discuss] | 4.6±0.3 | outer belt asteroid type P; Cybele asteroid | [87] · [73] | |
Himalia Jupiter VI |
≈ 85 | 4.2±0.6 | moon of Jupiter | [5] · [106] | |
Namaka Haumea II |
≈ 85 | 1.8±1.5 | moon of Haumea | [17] · [17] | |
Weywot Quaoar I |
≈ 85 | moon of 50000 Quaoar | |||
Germania 241 |
84.4±1.6 | ≈ 0.86±5 | belt asteroid type CP/type B | [87] · [73] | |
Freia 76 |
84.2±1.0 | 2.0±4.2[dubious – discuss] | outer belt asteroid type P/type X; Cybele asteroid | [82] · [73] | |
Rhadamanthus 38083 |
≈ 84 | trans-Neptunian object | [27] · M | ||
Kalliope 22 |
83.8±1.5 | 8.16±0.26 | belt asteroid type M; binary | [86] · [107] | |
Stereoskopia 566 |
83.7±1.7 | outer belt asteroid type C; Cybele asteroid | [86] · M | ||
Amalthea Jupiter V |
84±2 | 2.08±0.15 | moon of Jupiter | [108] · [109] | |
Agamemnon 911 |
83.3±2.0 | Jupiter trojan (L4) type D | [87] · M | ||
Elpis 59 |
82.6±2.3 | 3±0.5 | belt asteroid type CP/type B | [86] · [73] | |
Siegena 386 |
82.5±1.4 | 8.1±1.6 | belt asteroid type C | [87] · [73] | |
Sycorax Uranus XVII |
82.5+18 −21 |
moon of Uranus | [43] · M | ||
Puck Uranus XV |
81±2 | moon of Uranus | [110] · M | ||
Prokne 194 |
80.8±0.6 | 2.7±0.3 | belt asteroid type C | [86] · [73] | |
Eunike 185 |
80±1 | 3.6±2.6 | belt asteroid type C | [86] · [73] | |
Gyptis 444 |
79.7±0.2 | 10.6±2.8 | belt asteroid type C | [86] · [73] | |
Despina Neptune V |
78±5[dubious – discuss] | moon of Neptune | [97] · M | ||
Hypatia 238 |
77.8±0.4 | 4.9±1.7 | belt asteroid type C | [86] · [73] | |
Merapi 536 |
77.6±1.8 | ≈ 26±5 | belt asteroid type X | [73] · [73] | |
Lachesis 120 |
77.6±0.6 | belt asteroid type C | [86] · M | ||
Io 85 |
77.4±1.9[dubious – discuss] | 2.6±1.5 | belt asteroid type FC/type B | [87] · [73] | |
Bononia 361 |
77.2±1.3 | belt asteroid type D | [86] · M | ||
Minerva 93 |
77.08±0.65 | 3.5±0.4 | belt asteroid type C; trinary | [86] · [73] | |
Alexandra 54 |
77.07±0.32 | 6.2±3.5[dubious – discuss] | belt asteroid type C | [86] · [73] | |
Laetitia 39 |
77±2 | 4.7±1.1 | belt asteroid type S | [73] · [73] | |
2004 TT357 | 76.25±5[g] | resonant KBO (2:5); contact binary | [111] · M | ||
Berbericia 776 |
75.9±0.4 | 2.2±2.7[dubious – discuss] | belt asteroid type C | [86] · [73] | |
Juewa 139 |
75.6±0.8 | 5.5±2.2[dubious – discuss] | belt asteroid type CP/type X | [86] · [73] | |
Parthenope 11 |
75±1 | 5.91±0.45 | belt asteroid type S | [82] · [73] | |
Manwë 385446 |
≈ 75 | ≈ 1.41 | resonant KBO (4:7); binary | [112] · [112] | |
Pales 49 |
≈ 74.9 | 4.2±2.2 | belt asteroid type C | [87] · [73] | |
Adeona 145 |
74.8±2.7 | 2.08±0.57 | belt asteroid; Adeona family | [73] · [73] | |
Eleonora 354 |
74.5±0.2 | 7.2±2.6 | belt asteroid type S | [86] · [73] | |
Comacina 489 |
74.1±1.9[dubious – discuss] | belt asteroid type S | [87] · M | ||
1998 WW31 | ≈ 74 | 2.66±0.02 | cubewano; binary | [113] · [113] | |
Arethusa 95 |
74.0±2.4 | belt asteroid type C | [74] · M | ||
Flora 8 |
73.7±0.5 | ≈ 9.2±1.8 | belt asteroid type S; Flora family | [86] · [73] | |
Pulcova 762 |
73.7±0.4 | 1.4±0.1 | belt asteroid type F; binary | [86] · [114] | |
Hispania 804 |
73.50±0.96 | 5±1.78[dubious – discuss] | belt asteroid type P | [82] · [73] | |
Lomia 117 |
≈ 73 | 6.08±0.63 | belt asteroid type X | [73] · [73] | |
Dione 106 |
73.3±1.4[dubious – discuss] | 3.1±1.5 | belt asteroid type G | [87] · [73] | |
Julia 89 |
72.7±0.6 | 6.7±1.8 | belt asteroid type S | [86] · [73] | |
Sibylla 168 |
72.7±1.6 | 3.9±1.8[dubious – discuss] | belt asteroid type C | [86] · [73] | |
Philomela 196 |
72±2 | 4±1.5[dubious – discuss] | belt asteroid type S | [86] · [73] | |
Irene 14 |
72±1 | 2.9±1.9 | belt asteroid type S | [82] · [73] | |
Meliboea 137 |
71.9±1.3 | 7.3±3.1 | belt asteroid type C | [82] · [73] | |
Aglaja 47 |
71±4 | 3.2±1.7 | belt asteroid type C | [73] · [73] | |
Vibilia 144 |
70.7±1.4 | 5.3±1.2 | belt asteroid type C | [87] · [73] | |
Isolda 211 |
70.6±1.2 | 4.5±2.4 | belt asteroid type C | [86] · [73] | |
Adorea 268 |
70.3±1.6 | 3.2±2.3 | belt asteroid type FC | [74] · [73] | |
Patroclus 617 |
70.181±0.434 | 1.36±0.11 | Jupiter trojan (L5) type P; binary | [86] · [73] | |
Dido 209 |
70.175±5.06 | 4.59±7.42 | belt asteroid type C | [73] · [73] | |
Dembowska 349 |
69.715±2.15 | 3.58±1.03 | belt asteroid type R | [87] · [73] | |
Princetonia 508 |
69.845±1.155 | 2.99±0.65 | belt asteroid type C | [82] · [73] | |
Melpomene 18 |
69.797±1.226 | 3 | belt asteroid type S | [86] · [53] | |
Bertholda 420 |
69.349±1.723 | ≈ 14.8±0.9 | outer belt asteroid type P | [86] · [73] | |
Hedwig 476 |
69.247±0.488 | belt asteroid type P | [86] · M | ||
Nemausa 51 |
69.079±0.483 | 2.48±0.86 | belt asteroid type G | [86] · [73] | |
Hesperia 69 |
69.065±2.35 | 5.86±1.18 | belt asteroid type M | [87] · [73] | |
Typhon 42355 |
69±4.5 | 0.87±0.03 | SDO; resonant KBO (7:10); extended centaur; binary | [96] · [115] | |
Liguria 356 |
68.28±0.94 | ≈ 7.83±1.5 | belt asteroid type C | [82] · [73] | |
Medea 212 |
68.06±1.25 | ≈ 13.2±1 | belt asteroid type DCX | [87] · [73] | |
Massalia 20 |
67.84±1.837 | 5±1.04 | belt asteroid type S | [72] · [73] | |
Portia Uranus XII |
67.6±4 | moon of Uranus | [5] · M | ||
Wratislavia 690 |
67.325±1.9 | ≈ 12.8±0.3 | belt asteroid type CPF | [87] · [73] | |
Eukrate 247 |
67.215±1.25 | belt asteroid type CP/type Xc | [87] · M | ||
Papagena 471 |
67.095±2.6 | 3.05±1.73 | belt asteroid type S | [82] · [73] | |
Protogeneia 147 |
66.465±2.55 | ≈ 12.3±0.5 | belt asteroid type C | [87] · [73] | |
Emma 283 |
66.193±0.129 | 1.38±0.03 | belt asteroid type X; binary | [86] · [73] | |
Erminia 705 |
66.131±0.589 | belt asteroid type X | [86] · M | ||
Lumen 141 |
66.08±0.755 | ≈ 8.25±5.77 | belt asteroid type C | [82] · [73] | |
Paha Lempo I |
66+4 −4.5 |
0.746±0.001 | moon of 47171 Lempo | [79] · [116] | |
Lucina 146 |
65.947 | belt asteroid type C | [117] · M | ||
Sawiskera Teharonhiawako I |
65.5+12 −13 |
secondary of 88611 Teharonhiawako | [29] · M | ||
Kleopatra 216 |
65.333 | 4.64±0.02 | belt asteroid type M; trinary | [118] · [73] | |
Achilles 588 |
65.049±0.277 | Jupiter trojan (L4) type DU | [86] · M | ||
Lamberta 187 |
64.938±1.217 | 1.8±0.85 | belt asteroid type C | [86] · [73] | |
Carlova 360 |
64.563±1.416 | belt asteroid type C | [86] · M | ||
Klymene 104 |
64.495±1.901 | belt asteroid type C | [86] · M | ||
Ornamenta 350 |
64.365±0.599 | belt asteroid type C | [86] · M | ||
Polyxo 308 |
64.289±0.779 | belt asteroid type T | [86] · M | ||
Dynamene 200 |
64.151±0.973 | ≈ 1.07±0.16 | belt asteroid type C | [86] · [73] | |
Desiderata 344 |
62.985±0.689 | 1.39±0.48 | belt asteroid type C | [74] · [73] | |
Panopaea 70 |
63.956±0.373 | 4.33±1.09 | belt asteroid type C; Eunomia family | [86] · [73] | |
Thule 279 |
63.295±1.85 | belt asteroid type D | [87] · M | ||
Tanete 772 |
63.237±0.649 | belt asteroid type C | [86] · M | ||
Ate 111 |
63.172±0.117 | 1.76±0.44 | belt asteroid type C | [86] · [73] | |
Borasisi 66652 |
63+12.5 −25.5 |
3.433±0.027 | cubewano; binary | [29] · [119] | |
Ino 173 |
62.911±0.745 | 4.79±3.11 | belt asteroid type X | [86] · [73] | |
Charybdis 388 |
62.877±0.944 | belt asteroid type C | [86] · M | ||
Aemilia 159 |
62.618±0.596 | belt asteroid type C | [86] · M | ||
Pompeja 203 |
62.296±0.539 | belt asteroid type DCX | [72] · M | ||
Aurelia 419 |
62.235±1.54 | 1.72±0.34 | belt asteroid type F | [73] · [73] | |
Hestia 46 |
62.07±1.7 | 3.5 | belt asteroid type P/type Xc | [87] · [120] | |
Boliviana 712 |
62.063±0.632 | belt asteroid type C/type X | [72] · M | ||
2006 SQ372 308933 |
≈ 62 | extended centaur | [7] · M | ||
Argentina 469 |
61.555±0.825 | 4.53±1.76 | belt asteroid type X; Cybele asteroid | [82] · [73] | |
S/2000 (1998 WW31) 1 1998 WW31 I |
≈ 61.5 | secondary of 1998 WW31 | [113] · M | ||
Gudrun 328 |
61.295±1.86 | 3.16±0.46 | belt asteroid type S | [73] · [73] | |
Leto 68 |
61.255±1.569 | 3.28±1.9 | belt asteroid type S | [86] · [73] | |
2001 QG298 139775 |
≈ 61 | plutino; contact binary | [121] · M | ||
Elfriede 618 |
60.77±0.795 | belt asteroid type C | [82] · M | ||
Hippo 426 |
60.645±1.125 | belt asteroid type F | [82] · M | ||
Undina 92 |
60.465±0.85 | 4.43±0.25 | belt asteroid type X | [82] · [73] | |
Bellona 28 |
60.45±1.9 | 2.62±0.15 | belt asteroid type S | [122] · [73] | |
Diana 78 |
60.3±1.35 | 1.27±0.13 | belt asteroid type C | [123] · [73] | |
Myrrha 381 |
60.29±1.35 | ≈ 9.18±0.8 | outer belt asteroid type C | [87] · [73] | |
Anchises 1173 |
60.245±1.455 | Jupiter trojan (L5) type P | [82] · M | ||
Armida 514 |
60.047±0.395 | belt asteroid type XC | [124] · M | ||
Antigone 129 |
59.72±1.955 | 2.65±0.89 | belt asteroid type M | [73] · [73] | |
Nuwa 150 |
59.564±0.935 | 1.62±0.2 | belt asteroid type C | [125] · [73] | |
Veritas 490 |
59.402±0.915 | 5.99±2.23 | belt asteroid type C; Veritas family | [126] · [73] | |
Paris 3317 |
59.395±0.588 | Jupiter trojan (L5) type T | [127] · M | ||
Galatea 74 |
59.355±1.4 | 6.13±5.36 | belt asteroid type C | [128] · [73] | |
Deiphobus 1867 |
59.11±0.808 | Jupiter trojan (L5) type D | [129] · M | ||
Äneas 1172 |
59.01±0.403 | Jupiter trojan (L5) type D | [130] · M | ||
Diomedes 1437 |
58.893±0.59 | Jupiter trojan (L4) type D | [131] · M | ||
Terpsichore 81 |
58.864±0.367 | 6.19±5.31 | belt asteroid type C | [132] · [73] | |
Ani 791 |
58.433±0.512 | belt asteroid type C | [133] · M | ||
Freda 1093 |
58.365±1.45 | belt asteroid type C | [134] · M | ||
Ulla 909 |
58.22±1.2 | belt asteroid type X; Ulla family | [135] · M | ||
Zelinda 654 |
58.151±1.189 | 1.35±0.14 | belt asteroid type C | [86] · [73] | |
Chloris 410 |
58.123±0.422 | ≈ 6.24±0.3 | belt asteroid type C | [86] · [73] | |
Epimetheus Saturn XI |
58.1±1.8 | 5.266±0.006 | moon of Saturn | [25] · [25] | |
Johanna 127 |
58.07±1.965 | 3.08±1.35 | belt asteroid type C | [136] · [73] | |
Circe 34 |
57.745±0.989 | ≈ 3.66±0.03 | belt asteroid type C | [86] · [73] | |
Leda 38 |
57.705±0.665 | 5.71±5.47 | belt asteroid type C | [73] · [73] | |
Eucharis 181 |
57.692±0.732 | belt asteroid type S/type Xk | [137] · M | ||
Victoria 12 |
57.544±0.599 | 2.45±0.46 | belt asteroid type S | [138] · [73] | |
Adelheid 276 |
57.362±1.638 | belt asteroid type X | [139] · M | ||
Odysseus 1143 |
57.312±0.296 | Jupiter trojan (L4) type D | [140] · M | ||
Alcathous 2241 |
56.841±0.858 | Jupiter trojan (L5) type D | [141] · M | ||
Melete 56 |
56.62±0.85 | 4.61 | belt asteroid type P | [87] · [73] | |
Messalina 545 |
56.316±0.612 | belt asteroid type C | [142] · M | ||
Mnemosyne 57 |
56.295±1.4 | ≈ 12.6±2.4 | belt asteroid type S | [143] · [73] | |
Nestor 659 |
56.16±0.925 | Jupiter trojan (L4) type XC | [144] · M | ||
Sophrosyne 134 |
≈ 56.094 | belt asteroid type C | [117] · M | ||
Gǃòʼé ǃHú Gǃkúnǁʼhòmdímà I |
56±38 | moon of 229762 Gǃkúnǁʼhòmdímà | [145] · M | ||
Makhaon 3063 |
55.828±0.772 | Jupiter trojan (L4) type D | [146] · M | ||
Atalante 36 |
55.27±0.785 | 4.32±3.8 | belt asteroid type C | [82] · [73] | |
Athamantis 230 |
55.666±0.616 | 1.89±0.19 | belt asteroid type S | [82] · [73] | |
Hohensteina 788 |
55.648±0.392 | belt asteroid | [86] · M | ||
Harmonia 40 |
55.626±0.196 | belt asteroid type S | [147] · M | ||
Marianna 602 |
55.222±1.517 | 10.2±0.5 | belt asteroid type C | [148] · [73] | |
Xanthippe 156 |
55.205 | ≈ 6.49±3.71 | belt asteroid type C | [117] · [73] | |
Scheila 596 |
55.204±0.997 | belt asteroid type PCD/type T | [149] · M | ||
Semele 86 |
54.965±0.305 | belt asteroid type C | [86] · M | ||
Euterpe 27 |
54.895±0.77 | 1.67±1.01 | belt asteroid type S | [82] · [73] | |
Siwa 140 |
54.895±1.5 | belt asteroid type P/type Xc | [87] · M | ||
Helio 895 |
54.784±0.994 | 9.87±6.05 | outer belt asteroid type B | [86] · [73] | |
Thia 405 |
54.447±0.156 | 1.38±0.14 | belt asteroid type C | [86] · [73] | |
Antilochus 1583 |
54.421±0.272 | Jupiter trojan (L4) type D | [86] · M | ||
Fides 37 |
54.175±0.95 | belt asteroid type S | [150] · M | ||
Thorondor Manwë I |
54 | 0.5 | secondary of 385446 Manwë | [112] · [112] | |
Gerlinde 663 |
53.898±0.786 | belt asteroid type X | [151] · M | ||
Thalia 23 |
53.765±1.1 | 1.96±0.09 | belt asteroid type S | [152] · [73] | |
Brixia 521 |
53.614±0.247 | belt asteroid type C | [153] · M | ||
Iduna 176 |
53.488±0.54 | belt asteroid type G | [154] · M | ||
Erato 62 |
53.461±0.329 | belt asteroid type BU/type Ch; Themis family | [155] · M | ||
Astraea 5 |
53.349±1.57 | 2.9 | belt asteroid type S | [156] · [120] | |
Ianthe 98 |
53.08±1.88 | 0.893±0.199 | belt asteroid type C | [73] · [73] | |
Ninina 357 |
53.05±1.1 | belt asteroid type CX | [87] · M | ||
Albion 15760 |
≈ 53 | cubewano; classification name derived from its former designation 1992 QB1 | [7] · M | ||
Marion 506 |
52.97±1.3 | belt asteroid type XC | [157] · M | ||
Adelinda 229 |
52.956±0.889 | belt asteroid type BCU | [158] · M | ||
Ophelia 171 |
52.507±1.772 | belt asteroid type C; Themis family | [86] · M | ||
Pabu Borasisi I |
52.5+10 −21 |
secondary of 66652 Borasisi | [29] · M | ||
Rollandia 1269 |
52.447±0.521 | outer belt asteroid type D | [159] · M | ||
Mandeville 739 |
52.259±0.809 | 1.16±1.07 | belt asteroid type X | [160] · [73] | |
Corduba 365 |
52.255±1.21 | ≈ 5.84±0.95 | belt asteroid type X/type C | [73] · [73] | |
Eos 221 |
51.76±2.8 | ≈ 5.87±0.34 | belt asteroid type S/type K | [73] · [73] | |
Aegina 91 |
51.701±0.242 | belt asteroid type C | [161] · M | ||
Leukothea 35 |
51.528±0.601 | belt asteroid type C | [162] · M | ||
Menoetius Patroclus I |
51.4±0.25 | secondary of 617 Patroclus | [163] · M | ||
Isis 42 |
51.365±1.365 | 1.58±0.52 | belt asteroid type S | [73] · [73] | |
Tauris 814 |
51.115±1.069 | belt asteroid type C | [164] · M | ||
Helga 522 |
50.61±1.75 | belt asteroid type X; Cybele asteroid | [165] · M | ||
Flammario 1021 |
50.383±0.804 | 5.14±0.12 | belt asteroid type F | [86] · [73] | |
Klotho 97 |
50.359±0.321 | 1.33±0.13 | belt asteroid type M | [86] · [73] | |
Aquitania 387 |
50.255±1.45 | 1.8 | belt asteroid type S | [166] · [120] | |
Troilus 1208 |
50.239±0.549 | Jupiter trojan (L5) type FCU | [167] · M | ||
Eva 164 |
50.127±0.469 | 0.929±0.776 | belt asteroid type CX/type X[168] | [168] · [73] |
From 20 to 49 km
This list contains a few examples because there are about 589 asteroids in the asteroid belt with a measured radius between 20 and 49 km.[169] 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.[73][53]
Body[note 1] | Image | Radius[note 2] (km) |
Mass (1015 kg) |
Type – notes | Refs[note 6] r · M |
---|---|---|---|---|---|
Asterope 233 |
49.836±0.573 | belt asteroid type T/type K | [170] · M | ||
Pholus 5145 |
49.5+7.5 −7 |
centaur | [96] · M | ||
Nausikaa 192 |
49.388±0.619 | 1790±420 | belt asteroid type S | [171] · [73] | |
Thebe Jupiter XIV |
49.3±2 | moon of Jupiter | [108] · M | ||
Lutetia 21 |
49±1 | 1700±17 | belt asteroid type M | [172] · [173] | |
Luscinia 713 |
48.984±0.438 | outer belt asteroid type C | [174] · M | ||
Kalypso 53 |
48.631±13.299 | ≈ 5630±5000 | belt asteroid type XC | [175] · [73] | |
Laurentia 162 |
48.511±0.247 | belt asteroid type STU/type Ch[176] | [176] · M | ||
Tercidina 345 |
48.4325±0.4905 | 2680±1180 | belt asteroid type C | [86] · [73] | |
Notburga 626 |
48.42±2.335 | 3240±1300 | belt asteroid type CX/type Xc | [73] · [73] | |
Henrietta 225 |
47.967±0.625 | belt asteroid type F; Cybele asteroid | [177] · M | ||
Abastumani 1390 |
47.925±1.142 | outer belt asteroid type P | [178] · M | ||
Euforbo 4063 |
47.809±0.339 | Jupiter trojan (L4) type D | [179] · M | ||
Tisiphone 466 |
47.748±0.175 | belt asteroid type C | [180] · M | ||
Adria 143 |
47.689±0.349 | belt asteroid type C | [181] · M | ||
Arsinoë 404 |
47.485±0.476 | 3420±3030 | belt asteroid type C | [182] · [73] | |
Artemis 105 |
47.432±11.611 | 1540±540 | belt asteroid type C | [183] · [73] | |
Proserpina 26 |
47.4±0.85 | 748±895 | belt asteroid type S | [184] · [73] | |
Philosophia 227 |
47.318±1.278 | belt asteroid | [86] · M | ||
Kolga 191 |
47.268±0.217 | belt asteroid type XC/type Cb | [185] · M | ||
Andromache 175 |
47.266±0.542 | belt asteroid type C | [186] · M | ||
Kassandra 114 |
47.089±0.477 | belt asteroid type T | [187] · M | ||
Juliet Uranus XI |
46.8±4 | moon of Uranus | [5] · M | ||
Urania 30 |
46.394±1.02 | 1740±490 | belt asteroid type S | [188] · [73] | |
Irmintraud 773 |
45.836±0.45 | belt asteroid type D/type T | [189] · M | ||
Ausonia 63 |
45.816±2.181 | 1530±150 | belt asteroid type S | [86] · [73] | |
Polyxena 595 |
45.324±0.724 | outer belt asteroid | [190] · M | ||
Beatrix 83 |
44.819±1.326 | belt asteroid type X | [86] · M | ||
Concordia 58 |
44.806±0.419 | belt asteroid type C | [86] · M | ||
Teucer 2797 |
44.715±0.378 | Jupiter trojan (L4) type D | [191] · M | ||
Echidna Typhon I |
44.5±3 | moon of 42355 Typhon | [115] · M | ||
Alkeste 124 |
44.324±0.826 | belt asteroid type S | [192] · M | ||
Automedon 2920 |
44.287±0.898 | Jupiter trojan (L4) type D | [193] · M | ||
Vanadis 240 |
43.964±0.808 | 1100±920 | belt asteroid type C | [194] · [73] | |
Ottilia 401 |
43.902±0.218 | belt asteroid type C | [195] · M | ||
90 Antiope | 43.9±0.5 | 828±22 | belt asteroid type C; binary | [196] · [196] | |
Kythera 570 |
43.743±0.392 | outer belt asteroid type T | [197] · M | ||
Hermentaria 346 |
43.224±0.963 | 6330±180 | belt asteroid type S | [198] · [73] | |
Prometheus Saturn XVI |
43.1±2.7 | 159.5±1.5 | moon of Saturn | [25] · [25] | |
Lydia 110 |
43.045±1 | belt asteroid type M/type X | [199] · M | ||
Elara Jupiter VII |
≈ 43 | moon of Jupiter | [5] · M | ||
Danaë 61 |
42.969±1.076 | 2890±2780 | belt asteroid type S | [200] · [73] | |
Hekate 100 |
42.867±0.981 | belt asteroid type S | [201] · M | ||
Thetis 17 |
42.449±1.014 | 1200 | belt asteroid type S | [202] · [53] | |
Pandora 55 |
42.397±1.251 | belt asteroid type M | [203] · M | ||
Huenna 379 |
42.394±0.779 | 383±19 | belt asteroid type B/type C; binary | [204] · [101] | |
Virginia 50 |
42.037±0.121 | 2310±700 | belt asteroid type X/type Ch | [205] · [73] | |
Feronia 72 |
41.975±2.01 | ≈ 3320±8490 | belt asteroid type TDG | [73] · [73] | |
Hera 103 |
41.954±1.046 | belt asteroid type S | [206] · M | ||
S/2000 (90) 1 Antiope I |
41.9±0.5 | secondary of 90 Antiope | [196] · M | ||
Miriam 102 |
41.298±0.2 | belt asteroid type P/type C | [207] · M | ||
Felicitas 109 |
41.294±0.308 | belt asteroid type GC/type Ch[208] | [208] · M | ||
Poulydamas 4348 |
41.016±0.313 | Jupiter trojan (L5) type C | [209] · M | ||
Logos 58534 |
41±9 | 458±6.9 | cubewano; binary | [210] · [210] | |
Pandora Saturn XVII |
40.7±1.5 | 137.1±1.9 | moon of Saturn | [25] · [25] | |
Thalassa Neptune IV |
40.7±2.8 | moon of Neptune | [97] · M | ||
S/2007 (119979) 1 2002 WC19 I |
≈ 40.5 | moon of (119979) 2002 WC19 | [67] · M | ||
Gallia 148 |
40.435±0.52 | ≈ 4890±1670 | belt asteroid type GU/type S | [82] · [73] | |
Niobe 71 |
40.43±0.4 | belt asteroid type S | [82] · M | ||
Asbolus 8405 |
40.415 | centaur | [211] · M | ||
Pomona 32 |
40.38±0.8 | belt asteroid type S | [212] · M | ||
Belinda Uranus XIV |
40.3±8 | moon of Uranus | [5] · M | ||
Thyra 115 |
39.915±0.7 | belt asteroid type S | [213] · M | ||
Cressida Uranus IX |
39.8±2 | moon of Uranus | [5] · M | ||
Hertha 135 |
39.62±1 | belt asteroid type M | [214] · M | ||
Amycus 55576 |
38.15±6.25 | centaur | [59] · M | ||
Hylonome 10370 |
37.545 | centaur | [215] · M | ||
Gaussia 1001 |
36.356±0.149 | outer belt asteroid type PC | [216] · M | ||
Klio 84 |
39.16±0.48 | belt asteroid type G/type Ch | [82] · M | ||
1974 FV1 3708 |
37.831±0.404 | Jupiter trojan (L5) type C | [86] · M | ||
Nysa 44 |
37.83±0.37 | belt asteroid type E | [82] · M | ||
Hecuba 108 |
37.749±0.946 | belt asteroid type S | [217] · M | ||
Cyrene 133 |
36.088±0.466 | belt asteroid type S | [218] · M | ||
Rosalind Uranus XIII |
36±6 | moon of Uranus | [5] · M | ||
Caliban Uranus XVI |
≈ 36 | moon of Uranus | [5] · M | ||
Maja 66 |
35.895±0.46 | belt asteroid type C | [82] · M | ||
Sirona 116 |
35.85±2.9 | belt asteroid type S | [219] · M | ||
Ariadne 43 |
35.67±0.627 | ≈ 1210±220 | belt asteroid type S | [220] · [73] | |
Iphigenia 112 |
35.535±0.26 | ≈ 1970±6780 | belt asteroid type C | [73] · [73] | |
Gerda 122 |
35.338±0.456 | belt asteroid type ST/type L[221] | [221] · M | ||
Sappho 80 |
34.282±0.517 | belt asteroid type S | [222] · M | ||
Dike 99 |
33.677±0.208 | belt asteroid type C | [223] · M | ||
Zoe Logos I |
≈ 33.5 | moon of 58534 Logos | [210] · M | ||
Desdemona Uranus X |
32±4 | moon of Uranus | [5] · M | ||
Helena 101 |
32.92±0.65 | belt asteroid type S | [224] · M | ||
Echeclus 60558 or 174P |
32.3±0.8 | centaur | [96] · M | ||
Eurybates 3548 |
31.943±0.149 | Jupiter trojan (L4) type CP | [86] · M | ||
Eurynome 79 |
31.739±0.476 | belt asteroid type S | [225] · M | ||
Eurydike 75 |
31.189±0.802 | belt asteroid type M | [226] · M | ||
Thereus 5145 |
31±3 | centaur | [96] · M | ||
Halimede Neptune IX |
≈ 31 | moon of Neptune | [5] · M | ||
Crantor 82982 |
30.795 | centaur | [227] · M | ||
Frigga 77 |
30.695±0.089 | ≈ 1740±680 | belt asteroid type MU/type Xe[228] | [228] · [73] | |
Phocaea 25 |
30.527±1.232 | 599±60 | belt asteroid type S | [86] · [73] | |
Naiad Neptune III |
30.2±3.2 | moon of Neptune | [97] · M | ||
Schwassmann– Wachmann 1 29P |
30.2±3.7 | comet | [229] · M | ||
Hale–Bopp C/1995 O1 |
30±10 | comet | [230] · M | ||
Neso Neptune XIII |
≈ 30 | moon of Neptune | [5] · M | ||
Angelina 64 |
29.146±0.541 | belt asteroid type E | [231] · M | ||
Alkmene 82 |
28.811±0.357 | belt asteroid type S | [232] · M | ||
Althaea 119 |
28.65±0.55 | belt asteroid type S | [233] · M | ||
Nessus 7066 |
28.5±8.5 | centaur | [96] · M | ||
Asia 67 |
28.155±0.198 | ≈ 1030±100 | belt asteroid type S | [234] · [73] | |
Polana 142 |
27.406±0.139 | belt asteroid type F | [235] · M | ||
Bianca Uranus VIII |
27±2 | moon of Uranus | [5] · M | ||
Tolosa 138 |
26.453±0.524 | 493±259 | belt asteroid type S | [236] · [73] | |
Mathilde 253 |
26.4 | 103.3±4.4 | belt asteroid type C | [237] · [238] | |
Hidalgo 944 |
26.225±1.8 | centaur, first to be discovered in 1920; historically called asteroid. | [82] · M | ||
Piazzia 1000 |
25.775±0.43 | belt asteroid type C | [82] · M | ||
Orus 21900 |
25.405±0.405 | Jupiter trojan (L4) type C/type D | [86] · M | ||
Amalthea 113 |
25.069±0.633 | belt asteroid type S; Flora family; binary | [86] · M | ||
Prospero Uranus XVIII |
≈ 25 | moon of Uranus | [5] · M | ||
Liberatrix 125 |
24.209±0.267 | belt asteroid type M | [86] · M | ||
Setebos Uranus XIX |
≈ 24 | moon of Uranus | [5] · M | ||
Carme Jupiter XI |
≈ 23 | 130 | moon of Jupiter | [5] · M | |
Elatus 31824 |
22.935 | centaur | [239] · M | ||
Brunhild 123 |
22.605±0.942 | belt asteroid type S | [240] · M | ||
Velleda 126 |
≈ 22.41±0.65 | belt asteroid type S | [241] · M | ||
Klytia 73 |
22.295±0.471 | belt asteroid type S | [242] · M | ||
Sao Neptune XI |
≈ 22 | moon of Neptune | [5] · M | ||
Echo 60 |
21.609±0.286 | 315±32 | belt asteroid type S | [243] · [73] | |
Metis Jupiter XVI |
21.5±2 | ≈ 119.893 | moon of Jupiter | [108] · [244] | |
Aethra 132 |
21.435±0.8 | ≈ 410±2710 | belt asteroid type M | [245] · [73] | |
Ophelia Uranus VII |
21.4±4 | moon of Uranus | [5] · M | ||
Laomedeia Neptune XII |
≈ 21 | moon of Neptune | [5] · M | ||
Peitho 118 |
20.106±0.246 | belt asteroid type S | [246] · M | ||
Cordelia Uranus VI |
20.1±3 | moon of Uranus | [5] · M | ||
Lacrimosa 208 |
20.028±0.297 | belt asteroid type S; Koronis family | [247] · M | ||
Pasiphae Jupiter VIII |
≈ 20 | moon of Jupiter | [5] · M | ||
Siarnaq Saturn XXIX |
≈ 20 | moon of Saturn | [5] · M | ||
Psamathe Neptune X |
≈ 20 | moon of Neptune | [5] · M |
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 moons.
Body[note 1] | Image | Radius[note 2] (km) |
Mass (1015 kg) |
Type – notes | Refs[note 6] r · M |
---|---|---|---|---|---|
Urda 167 |
19.968±0.132 | belt asteroid type S; Koronis family | [248] · M | ||
Hydra Pluto III |
19.65 | 48±42 | moon of Pluto | [249] · [250] | |
Koronis 158 |
19.513±0.231 | belt asteroid type S; Koronis family | [251] · M | ||
Nix Pluto II |
19.017 | 45±40 | moon of Pluto | [249] · [250] | |
Sinope Jupiter IX |
≈ 19 | moon of Jupiter | [5] · M | ||
Ganymed 1036 |
18.838±0.199 | ≈ 167±318 | Amor asteroid type S | [86] · [73] | |
Austria 136 |
18.447±0.259 | belt asteroid type M | [252] · M | ||
Okyrhoe 52872 |
18±0.6 | centaur | [253] · M | ||
Lysithea Jupiter X |
≈ 18 | moon of Jupiter | [5] · M | ||
Helene Saturn XII |
17.6±0.4 | moon of Saturn; Dione trojan (L4) | [25] · M | ||
Hippocamp Neptune XIV |
17.4 | ≈ 50 | moon of Neptune | [97] · [97] | |
Leucus 11351 |
17.078±0.323 | Jupiter trojan (L4) type D | [86] · M | ||
Albiorix Saturn XXVI |
≈ 16 | moon of Saturn | [5] · M | ||
Stephano Uranus XX |
≈ 16 | moon of Uranus | [5] · M | ||
S/2002 (121) 1 Hermione I |
≈ 16 | asteroid moon of 121 Hermione | [100] · M | ||
Arrokoth 486958 |
15.85±0.25 | cubewano; contact binary; New Horizons flyby | [254] · M | ||
Weringia 226 |
15.747±0.155 | belt asteroid type S | [255] · M | ||
Ida 243 |
15.7 | 42±6 | belt asteroid type S; Koronis family; binary; Galileo flyby | [256] · [257] | |
Vala 131 |
15.669±0.152 | belt asteroid type SU/type Xc[241] | [258] · M | ||
Comas Solà 1655 |
15.3±1.1 | belt asteroid type B | [259] · M | ||
Beethoven 1815 |
15.299±0.084 | belt asteroid type F | [86] · M | ||
Atlas Saturn XV |
15.1±0.9 | 6.6 | moon of Saturn | [25] · [25] | |
Pan Saturn XVIII |
14.1±1.3 | 4.95 | moon of Saturn | [25] · [260] | |
Linus Kalliope I |
14±1 | ≈ 60 | asteroid moon of 22 Kalliope | [107] · [261] | |
Dioretsa 20461 |
14±3 | centaur; damocloid | [262] · M | ||
Ananke Jupiter XII |
≈ 14 | moon of Jupiter | [5] · M | ||
Perdita Uranus XXV |
13±1 | moon of Uranus | [5] · M | ||
Telesto Saturn XIII |
12.4±0.4 | moon of Saturn; Tethys trojan (L4) | [25] · M | ||
Mab Uranus XXVI |
12±1 | moon of Uranus | [5] · M | ||
Medusa 149 |
11.859±0.134 | belt asteroid type S | [263] · M | ||
Phobos Mars I |
11.267 | 10.659 | moon of Mars | [264] · [265] | |
Paaliaq Saturn XX |
≈ 11 | moon of Saturn | [5] · M | ||
Francisco Uranus XXII |
≈ 11 | moon of Uranus | [5] · M | ||
Calypso Saturn XIV |
10.7±0.7 | moons of Saturn; Tethys trojan (L5) | [25] · M | ||
Polymele 15094 |
10.548±0.068 | Jupiter trojan (L4) type P | [87] · M | ||
Leda Jupiter XIII |
≈ 10 | moon of Jupiter | [5] · M | ||
Margaret Uranus XXIII |
≈ 10 | moon of Uranus | [5] · M | ||
Ferdinand Uranus XXIV |
≈ 10 | moon of Uranus | [5] · M | ||
Euler 2002 |
9.887±0.029 | belt asteroid type S | [266] · M | ||
S/2000 (762) 1 Pulcova I |
9.5±3.5 | asteroid moon of 762 Pulcova | [114] · M | ||
Cupid Uranus XXVII |
9±1 | moon of Uranus | [5] · M | ||
Ymir Saturn XIX |
≈ 9 | moon of Saturn | [5] · M | ||
Trinculo Uranus XXI |
≈ 9 | moon of Uranus | [5] · M | ||
Romulus Sylvia I |
≈ 9 | 93.19+207 −83 |
asteroid moon of 87 Sylvia | [267] · [267] | |
Eros 433 |
8.42±0.02 | 6.687±0.003 | Amor asteroid type S; NEAR Shoemaker orbited and landed | [268] · [268] | |
Adrastea Jupiter XV |
8.2±2 | moon of Jupiter | [5] · M | ||
Kiviuq Saturn XXIV |
≈ 8 | moon of Saturn | [5] · M | ||
S/2001 (107) 1 Camilla I |
8±3 | asteroid moon of 107 Camilla | [269] · M | ||
Tarvos Saturn XXI |
≈ 7.5 | moon of Saturn | [5] · M | ||
Herschel 2000 |
7.384 | belt asteroid | [86] · M | ||
2002 RP120 65407 |
7.3±1.4 | damocloid | [270] · M | ||
Kerberos Pluto IV |
≈ 6.333 | 16±9 | moon of Pluto | [271] · [272] | |
Gaspra 951 |
6.266 | 20–30 | belt asteroid type S; Galileo flyby | [273] · [274] | |
Deimos Mars II |
6.2±0.18 | 1.476 | moon of Mars | [5] · [275] | |
Skamandrios Hektor I |
6±1.5 | asteroid moon of 624 Hektor | [84] · M | ||
Ijiraq Saturn XXII |
≈ 6 | moon of Saturn | [5] · M | ||
Halley's Comet 1P |
5.75 | 0.22 | comet | [276] · [277] | |
Styx Pluto V |
≈ 5.5 | ≈ 7.65 | moon of Pluto | [271] · [272] | |
Masursky 2685 |
5.372±0.085 | belt asteroid type S; Cassini flyby | [278] · M | ||
Damocles 5335 |
≈ 5 | centaur; damocloid | [27] · M | ||
Erriapus Saturn XXVIII |
≈ 5 | moon of Saturn | [5] · M | ||
Alexhelios Kleopatra I |
4.45±0.8 | asteroid moon of 216 Kleopatra | [279] · M | ||
Callirrhoe Jupiter XVII |
≈ 4.3 | moon of Jupiter | [5] · M | ||
Comas Solà 32P |
4.2 | Jupiter-family comet | [280] · M | ||
Esclangona 1509 |
4.085±0.3 | inner belt asteroid type S; binary | [281] · M | ||
Misterrogers 26858 |
4.035±0.085 | Mars crosser type S | [82] · M | ||
Themisto Jupiter XVIII |
≈ 4 | moon of Jupiter | [5] · M | ||
Daphnis Saturn XXXV |
3.8±0.8 | 0.077±0.015 | moon of Saturn | [25] · [25] | |
Petit-Prince Eugenia I |
3.5±1 | asteroid moon of 45 Eugenia | [95] · M | ||
S/2003 (130) 1 Elektra I |
3.5±1.5 | asteroid moon of 130 Elektra | [282] · M | ||
Bestla Saturn XXXIX |
≈ 3.5 | moon of Saturn | [5] · M | ||
Remus Sylvia II |
≈ 3.5 | 73.3+47 −23 |
asteroid moon of 87 Sylvia | [267] · [267] | |
Cleoselene Kleopatra II |
3.45±0.8 | asteroid moon of 216 Kleopatra | [279] · M | ||
S/2019 (31) 1 Euphrosyne I |
3.35±1.2 | asteroid moon of 31 Euphrosyne | [283] · M | ||
Tempel 1 9P |
3±0.1 | Jupiter-family comet; Deep Impact flyby and impacted | [284] · M | ||
S/2006 S 1 (Lost moon) |
3 | 0.15 | Moon of Saturn | [285] · M | |
S/2006 S 3 (Lost moon) |
3 | 0.15 | Moon of Saturn | [285] · M | |
S/2004 S 13 (Lost moon) |
3 | 0.15 | Moon of Saturn | [285] · M | |
S/2007 S 2 (Lost moon) |
3 | 0.15 | Moon of Saturn | [285] · M | |
S/2004 S 7 (Lost moon) |
3 | 0.15 | Moon of Saturn | [285] · M | |
Phaethon 3200 |
2.9 | Apollo asteroid type F | [286] · M | ||
S/2003 (379) 1 Huenna I |
2.9±0.6 | asteroid moon of 379 Huenna | [287] · M | ||
1999 JM8 53319 |
2.7±0.6 | Apollo asteroid type X | [288] · M | ||
Borrelly 19P |
2.66 | Jupiter-family comet | [289] · M | ||
S/2014 (130) 1 Elektra II |
2.6±0.6 | asteroid moon of 130 Elektra | [282] · M | ||
Šteins 2867 |
2.58±0.084 | belt asteroid type E; Rosetta flyby | [86] · M | ||
S/2004 (45) 1 Eugenia II |
2.5±1 | asteroid moon of 45 Eugenia | [95] · M | ||
S/2004 S 12 (Lost moon) |
2.5 | 0.09 | Moon of Saturn | [285] · M | |
S/2007 S 3 (Lost moon) |
2.5 | 0.09 | Moon of Saturn | [285] · M | |
Atira 163693 |
2.4±0.25 | Atira asteroid type S; binary | [290] · M | ||
Annefrank 5535 |
2.4 | belt asteroid type S Stardust flyby | [291] · M | ||
Encke 2P |
≈ 2.4 | comet | [292] · M | ||
Comet Hyakutake C/1996 B2 |
≈ 2.4 | comet | [293] · M | ||
Balam 3749 |
2.332±0.107 | 0.51±0.02 | belt asteroid type S; trinary | [294] · [295] | |
Pallene Saturn XXXIII |
2.22±0.07 | moon of Saturn | [296] · M | ||
Florence 3122 |
2.201±0.015 | 0.079±0.002 | Amor asteroid type S; trinary | [74] · [297] | |
Wild 2 81P |
2.133 | Jupiter family comet; Stardust flyby | [298] · M | ||
Litva 2577 |
2.115 | Mars-crosser type EU; Hungaria family; trinary | [299] · M | ||
Hal 9000 |
2.055 | Inner belt asteroid type S; Flora family | [300] · M | ||
Littlewood 26993 |
2.0035 | Main-belt asteroid | [301] · M | ||
Churyumov–Gerasimenko 67P |
2 | 0.00998 | Jupiter-family comet | [302] · [303] | |
Eirene Jupiter LVII |
2 | 0.09 | Moon of Jupiter | [304] · M | |
S/2004 S 17 (Lost moon) |
2 | 0.05 | Moon of Saturn | [285] · M | |
Donaldjohanson 52246 |
1.948±0.007 | belt asteroid type C | [305] · M | ||
Toro 1685 |
1.905±0.025 | Apollo asteroid type S | [74] · M | ||
Cuno 4183 |
1.826±0.051 | Apollo asteroid type S/type Q | [306] · M | ||
Aegis Minerva I |
1.8±0.5 | asteroid moon of 93 Minerva | [307] · M | ||
S/2016 (107) 1 Camilla II |
1.75±0.25 | asteroid moon of 107 Camilla | [269] · M | ||
LINEAR 118401 or 176P |
1.75±0.05 | belt asteroid; comet; Themis family | [308] · M | ||
Holmes 17P |
≈ 1.71 | Jupiter-family comet | [309] · M | ||
Gorgoneion Minerva II |
1.6±0.45 | asteroid moon of 93 Minerva | [307] · M | ||
1986 DA 6178 |
1.575 | Amor asteroid type M | [310] · M | ||
Pichi üñëm Alauda I |
1.55±0.45 | asteroid moon of 702 Alauda | [311] · M | ||
Toutatis 4179 |
1.516 | 0.0505 | Apollo asteroid type S; Chang'e 2 flyby | [312] · [312] | |
Kaʻepaokaʻawela 514107 |
≈ 1.5 | retrograde Jupiter co-orbital | [313] · M | ||
S/2016 J 1 Jupiter LIV |
1.5 | 0.015 | Moon of Jupiter | [304] · M | |
Methone Saturn XXXII |
1.45±0.03 | moon of Saturn | [296] · M | ||
1998 QE2 285263 |
1.375 | Amor asteroid type S; binary | [314] · M | ||
Polydeuces Saturn XXXIV |
1.3±0.4 | moon of Saturn; Dione trojan (L5) | [25] · M | ||
2001 SN263 153591 |
1.315±0.2 | 0.00951±0.00013 | Amor asteroid type C; trinary | [315] · [316] | |
S/2003 (1509) 1 Esclangona I |
≈ 1.285 | asteroid moon of 1509 Esclangona | [317] · M | ||
APL 132524 |
≈ 1.25 | belt asteroid type S; New Horizons flyby | [318] · M | ||
Magellan 4055 |
1.245 | Amor asteroid type V | [319] · M | ||
Camillo 3752 |
1.153±0.044 | Apollo asteroid type S | [74] · M | ||
2002 VU94 90075 |
1.117±0.042 | Apollo asteroid type S | [320] · M | ||
Cruithne 3753 |
1.036±0.053 | Aten asteroid type Q; quasi-satellite of Earth | [321] · M | ||
Zephyr 12923 |
1.03±0.007 | Apollo asteroid type S | [74] · M | ||
Ersa Jupiter LXXI |
1 | 0.015 | Moon of Jupiter | [304] · M | |
Pandia Jupiter LXV |
1 | 0.015 | Moon of Jupiter | [304] · M | |
S/2017 J 7 Jupiter LXVIII |
1 | 0.015 | Moon of Jupiter | [304] · M | |
S/2017 J 6 Jupiter LXVII |
1 | 0.015 | Moon of Jupiter | [304] · M | |
S/2017 J 3 Jupiter LXIV |
1 | 0.015 | Moon of Jupiter | [304] · M | |
S/2017 J 5 Jupiter LXVI |
1 | 0.015 | Moon of Jupiter | [304] · M | |
S/2017 J 2 Jupiter LXIII |
1 | 0.015 | Moon of Jupiter | [304] · M | |
S/2017 J 1 Jupiter LIX |
1 | 0.015 | Moon of Jupiter | [304] · M | |
S/2017 J 9 Jupiter LXX |
1 | 0.015 | Moon of Jupiter | [304] · M | |
S/2010 J 1 Jupiter LI |
1 | Moon of Jupiter | [304] · M | ||
Eupheme Jupiter LX |
1 | 0.015 | Moon of Jupiter | [304] · M | |
S/2003 J 18 Jupiter LV |
1 | 0.015 | Moon of Jupiter | [304] · M | |
S/2003 J 19 Jupiter LXI |
1 | 0.015 | Moon of Jupiter | [304] · M | |
Philophrosyne Jupiter LVIII |
1 | 0.015 | Moon of Jupiter | [304] · M | |
S/2003 J 2 (Lost moon) |
1 | 0.015 | Moon of Jupiter | [304] · M | |
S/2003 J 4 (Lost moon) |
1 | 0.015 | Moon of Jupiter | [304] · M | |
S/2003 J 23 (Lost moon) |
1 | 0.015 | Moon of Jupiter | [304] · M | |
S/2003 J 10 (Lost moon) |
1 | 0.015 | Moon of Jupiter | [304] · M | |
S/2003 J 16 (Lost moon) |
1 | 0.015 | Moon of Jupiter | [304] · M | |
Euporie Jupiter XXXIV |
1 | 0.015 | Moon of Jupiter | [304] · M | |
Thelxinoe Jupiter XLII |
1 | 0.015 | Moon of Jupiter | [304] · M | |
Mneme Jupiter XL |
1 | 0.015 | Moon of Jupiter | [304] · M | |
Herse Jupiter L |
1 | 0.015 | Moon of Jupiter | [304] · M | |
Kale Jupiter XXXVII |
1 | 0.015 | Moon of Jupiter | [304] · M | |
Kallichore Jupiter XLIV |
1 | 0.015 | Moon of Jupiter | [304] · M | |
Pasithee Jupiter XXXVIII |
1 | 0.015 | Moon of Jupiter | [304] · M | |
Kore Jupiter XLIX |
1 | 0.015 | Moon of Jupiter | [304] · M |
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,[322] 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, and interplanetary dust cloud. (See also Visited/imaged bodies.)
Surface gravity
The surface gravity at the equator of a body can in most cases be accurately calculated using Newton's law of universal gravitation and centrifugal force.
The gravitational acceleration at the equator is given by Newton's law of universal gravitation. The formula that follows from this law is:
where
- ag is the magnitude of the gravitational acceleration
- G is the gravitational constant
- m is the mass of the celestial body
- r is the equatorial radius of the celestial body (if this varies significantly, the mean equatorial radius is used)
The magnitude of the outward acceleration due to centrifugal force is given by
where
- T is the rotation period of the celestial body
The surface gravity at the equator is then given by:
See also
- List of dwarf planets
- List of minor planets
- List of natural satellites
- List of near-Earth asteroids by distance from Sun
- List of Solar System objects most distant from the Sun
- List of space telescopes
- Lists of astronomical objects
Notes
- ^ a b c d e f Radius estimated using equatorial radius and assuming body is spherical
- ^ a b Radius has been determined by various methods, such as optical (Hubble), thermal (Spitzer), or direct imaging via spacecraft
- ^ a b c d Radius estimated by using three radii and assuming body is spheroid
- ^ a b Best fit, assuming Haumea is in hydrostatic equilibrium
- ^ Calculated in Wolfram Alpha using semi axes of 1050 × 840 × 537 (Ellipsoid volume: 1.98395×10^9 km³)
- ^ 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).[98]
- ^ The mean radius of 76.25±5, or mean diameter of 152.5±10, is derived from the given dimensions 218±7 × 87±3
- ^ 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
- ^ a b c d e f g Mean radius including uncertainties
- ^ Given as surface gravity (1 bar for gaseous planets)
- ^ Ranking by radius of the largest bodies in the Solar System; may not reflect the latest updates of measured radii
- ^ a b Figures from default source Johnston's Archive—List of Known Trans-Neptunian Objects,[27] if otherwise not mentioned in the References column
- ^ a b c d e f Reference column specifically for radius (r) and mass (M) citations
References
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ignored (|display-authors=
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- ^ Sicardy, B.; et al. (2011). "Size, density, albedo and atmosphere limit of dwarf planet Eris from a stellar occultation" (PDF). European Planetary Science Congress Abstracts. 6: 137. Bibcode:2011epsc.conf..137S. Retrieved 2011-09-14.
- ^ Brown, Michael E.; Schaller, Emily L. (15 June 2007). "The Mass of Dwarf Planet Eris". Science. 316 (5831): 1585. Bibcode:2007Sci...316.1585B. doi:10.1126/science.1139415. PMID 17569855.
{{cite journal}}
: Invalid|ref=harv
(help) - ^ a b
Dunham, E. T.; Desch, S. J.; Probst, L. (April 2019). "Haumea's Shape, Composition, and Internal Structure". The Astrophysical Journal. 877 (1): 11. arXiv:1904.00522. Bibcode:2019ApJ...877...41D. doi:10.3847/1538-4357/ab13b3.
{{cite journal}}
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: Invalid|ref=harv
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- ^ Roatsch Jaumann et al. 2009, p. 765, Tables 24.1–2
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: Invalid|ref=harv
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{{cite journal}}
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cited data from: Lellouch et al., 2013, of estimated diameter of 668 (+154,−86) km
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{{cite conference}}
: Unknown parameter|booktitle=
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{{cite journal}}
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ignored (|name-list-style=
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Further reading
- NASA Planetary Data System (PDS)
- Asteroids with Satellites
- Minor Planet discovery circumstances
- Supplemental IRAS Minor Planet Survey (SIMPS) and IRAS Minor Planet Survey (IMPS)
- SIMPS & IMPS (V6, additional, from here)
- Asteroid Data Archive (dead link) Archive Planetary Science Institute
External links
- Planetary fact sheets
- Asteroid fact sheet
- All (known) Bodies in the Solar System Larger than 200 Miles in Diameter – in an image, put side-by-side.
- Size comparison of asteroids and comets visited by space probe (Parent article of image at The Planetary Society)
- Scaled Solar System montage at TPS Blog