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

These lists contain the Sun, the planets, dwarf planets, many of the larger small Solar System bodies (which includes the asteroids), all named natural satellites, and a number of smaller objects of historical or scientific interest, such as comets and near-Earth objects.

Many trans-Neptunian objects (TNOs) have been discovered; in many cases their positions in this list are approximate, as there is frequently a large uncertainty in their estimated diameters due to their distance from Earth.

Solar System objects more massive than 10²¹ kilograms are known or expected to be approximately spherical. Astronomical bodies relax into rounded shapes (spheroids), achieving hydrostatic equilibrium, when their own gravity is sufficient to overcome the structural strength of their material. It was believed that the cutoff for round objects is somewhere between 100 km and 200 km in radius if they have a large amount of ice in their makeup;^[1] however, later studies revealed that icy satellites as large as Iapetus (1,470 kilometers in diameter) are not in hydrostatic equilibrium at this time,^[2] and a 2019 assessment suggests that many TNOs in the size range of 400–1,000 kilometers may not even be fully solid bodies, much less gravitationally rounded.^[3] Objects that are ellipsoids due to their own gravity are here generally referred to as being "round", whether or not they are actually in equilibrium today, while objects that are clearly not ellipsoidal are referred to as being "irregular."

Spheroidal bodies typically have some polar flattening due to the centrifugal force from their rotation, and can sometimes even have quite different equatorial diameters (scalene ellipsoids such as Haumea). Unlike bodies such as Haumea, the irregular bodies have a significantly non-ellipsoidal profile, often with sharp edges.

There can be difficulty in determining the diameter (within a factor of about 2) for typical objects beyond Saturn. (See 2060 Chiron as an example) For TNOs there is some confidence in the diameters, but for non-binary TNOs there is no real confidence in the masses/densities. Many TNOs are often just assumed to have Pluto's density of 2.0 g/cm³, but it is just as likely that they have a comet-like density of only 0.5 g/cm³.^[4]

For example, if a TNO is incorrectly assumed to have a mass of 3.59×10²⁰ kg based on a radius of 350 km with a density of 2 g/cm³ but is later discovered to have a radius of only 175 km with a density of 0.5 g/cm³, its true mass would be only 1.12×10¹⁹ kg.

The sizes and masses of many of the moons of Jupiter and Saturn are fairly well known due to numerous observations and interactions of the Galileo and Cassini orbiters; however, many of the moons with a radius less than ~100 km, such as Jupiter's Himalia, have far less certain masses.^[5] Further out from Saturn, the sizes and masses of objects are less clear. There has not yet been an orbiter around Uranus or Neptune for long-term study of their moons. For the small outer irregular moons of Uranus, such as Sycorax, which were not discovered by the Voyager 2 flyby, even different NASA web pages, such as the National Space Science Data Center^[6] and JPL Solar System Dynamics,^[5] give somewhat contradictory size and albedo estimates depending on which research paper is being cited.

There are uncertainties in the figures for mass and radius, and irregularities in the shape and density, with accuracy often depending on how close the object is to Earth or whether it has been visited by a probe.

list:

Graphical overview

• 
  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 mean radius of at least 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] The known icy moons in this range are all ellipsoidal (except Proteus), but trans-Neptunian objects up to 450–500 km radius may be quite porous.^[10]

For simplicity and comparative purposes, the values are manually calculated assuming that the bodies are all spheres. The size of solid bodies does not include an object's atmosphere. For example, Titan looks bigger than Ganymede, but its solid body is smaller. For the giant planets, the "radius" is defined as the distance from the center at which the atmosphere reaches 1 bar of atmospheric pressure.^[11]

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

Body[note 1]	Image	Radius[note 2]		Volume		Mass		Surface area		Density	Gravity[note 3]		Type	Discovery
		(km)	(R🜨)	(109 km3)	(V🜨)	(1021 kg)	(M🜨)	(106 km2)	🜨	(g/cm3)	(m/s2)	(🜨)
Sun		695700 ± ?[13]	109.2[14]	1,409,300,000[14]	1,301,000[14]	1989100000[14]	333,000[14]	6,078,700[14]	11,918[14]	1.409[14]	274.0[14]	27.94[14]	G2V-class star	prehistoric
Jupiter		69911±6[15]	10.97	1,431,280	1,321	1898187±88[15]	317.83	61,419[16]	120.41	1.3262±0.0003[15]	24.79[15]	2.528	gas giant planet; has rings	prehistoric
Saturn		58232±6[15] (136775 for A Ring)	9.140	827,130	764	568317±13[15]	95.162	42,612[17]	83.54	0.6871±0.0002[15]	10.44[15]	1.065	gas giant planet; has rings	prehistoric
Uranus		25362±7[15]	3.981	68,340	63.1	86813±4[15]	14.536	8083.1[18]	15.85	1.270±0.001[15]	8.87[15]	0.886	ice giant planet; has rings	1781
Neptune		24622±19[15]	3.865	62,540	57.7	102413±5[15]	17.147	7618.3[19]	14.94	1.638±0.004[15]	11.15[15]	1.137	ice giant planet; has rings	1846
Earth		6371.0±0.0001[15]	1	1,083.21	1	5972.4±0.3[15]	1	510.06447[20]	1	5.5136±0.0003[15]	9.81[15]	1	terrestrial planet	prehistoric
Venus		6052±1[15]	0.9499	928.43	0.857	4867.5±0.2[15]	0.815	460.2[21]	0.903	5.243±0.003[15]	8.87[15]	0.905	terrestrial planet	prehistoric
Mars		3389.5±0.2[15]	0.5320	163.18	0.151	641.71±0.03[15]	0.107	144.37[22]	0.283	3.9341±0.0007[15]	3.71[15]	0.379	terrestrial planet	prehistoric
Ganymede Jupiter III		2634.1±0.3	0.4135	76.30	0.0704	148.2	0.0248	86.999[23]	0.171	1.936	1.428	0.146	moon of Jupiter (icy)	1610
Titan Saturn VI		2574.73±0.09[24]	0.4037[a]	71.50	0.0658	134.5	0.0225	83.3054[25]	0.163	1.880±0.004	1.354	0.138	moon of Saturn (icy)	1655
Mercury		2439.4±0.1[15]	0.3829	60.83	0.0562	330.11±0.02[15]	0.0553	74.797[26]	0.147	5.4291±0.007[15]	3.70[15]	0.377	terrestrial planet	prehistoric
Callisto Jupiter IV		2410.3±1.5[24]	0.3783	58.65	0.0541	107.6	0.018	73.005[27]	0.143	1.834±0.003	1.23603	0.126	moon of Jupiter (icy)	1610
Io Jupiter I		1821.6±0.5[5]	0.2859	25.32	0.0234	89.32	0.015	41.698[28]	0.082	3.528±0.006	1.797	0.183	moon of Jupiter (terrestrial)	1610
Moon Earth I		1737.5±0.1[29]	0.2727	21.958	0.0203	73.46[30]	0.0123	37.937[31]	0.074	3.344±0.005[29]	1.625	0.166	moon of Earth (terrestrial)	prehistoric
Europa Jupiter II		1560.8±0.5[5]	0.2450	15.93	0.0147	48.00	0.008035	30.613[32]	0.06	3.013±0.005	1.316	0.134	moon of Jupiter (terrestrial)	1610
Triton Neptune I		1353.4±0.9[a][24]	0.2124[a]	10.38	0.0096	21.39±0.03	0.003599	23.018[33]	0.045	2.061	0.782	0.0797	moon of Neptune (icy)	1846
Pluto 134340		1188.3±0.8	0.187	7.057	0.00651	13.03±0.03	0.0022	17.79	0.034	1.854±0.006	0.620	0.063	dwarf planet; plutino; multiple	1930
Eris 136199		1163±6[b][34]	0.1825[b]	6.59	0.0061	16.6±0.2[35]	0.0028	17	0.033	2.52±0.07	0.824	0.083	dwarf planet; SDO; binary	2003
Haumea 136108		798±6 to 816[36]	0.12	1.98[c]	0.0018	4.01±0.04[37]	0.00066	8.14	0.016	2.018[38][d]	0.401	0.0409	dwarf planet; resonant KBO (7:12); trinary; has rings	2004
Titania Uranus III		788.9±1.8[24] Zdroj:https://en.wikipedia.org?pojem=List_of_Solar_System_objects_by_size Text je dostupný za podmienok Creative Commons Attribution/Share-Alike License 3.0 Unported; prípadne za ďalších podmienok. Podrobnejšie informácie nájdete na stránke Podmienky použitia.  Navigácia: Veda > Analytika Antropológia Aplikované vedy Bibliometria Dejiny vedy Encyklopédie Filozofia vedy Forenzné vedy Humanitné vedy Knižničná veda Kryogenika Kryptológia Kulturológia Literárna veda Medzidisciplinárne oblasti Metódy kvantitatívnej analýzy Metavedy Metodika Metodológia vedy Náboženstvo a veda Náučná literatúra Podvody vo vede Popularizácia vedy Potravinárstvo Prírodné vedy Pseudoveda Scientometria Spoločenské vedy Teórie Teatrológia Technické vedy Technika Terminológia Umenie Výskum Veda Veda a technika podľa štátu Veda a technika podľa kontinentu Veda a technika podľa roka Veda v kozme Vedci Vedecká literatúra Vedecké databázy Vedecké experimenty Vedecké konferencie Vedecké metódy Vedecké ocenenia Vedecké organizácie Vedecké parky Vedeckí spisovatelia Vzdelávanie Záhady Príbuzné výrazy: Text je dostupný za podmienok Creative Commons Attribution/Share-Alike License 3.0 Unported; prípadne za ďalších podmienok. Podrobnejšie informácie nájdete na stránke Podmienky použitia. www.astronomia.sk | www.biologia.sk | www.botanika.sk | www.dejiny.sk | www.economy.sk | www.elektrotechnika.sk | www.estetika.sk | www.farmakologia.sk | www.filozofia.sk | Fyzika | www.futurologia.sk | www.genetika.sk | www.chemia.sk | www.lingvistika.sk | www.politologia.sk | www.psychologia.sk | www.sexuologia.sk | www.sociologia.sk | www.veda.sk I www.zoologia.sk