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- List_of_Solar_System_objects_by_size abstract "This is a list of Solar System objects by size, arranged in descending order of mean volumetric radius. The list can also be partially sorted according to an object's mass and, for the largest objects, volume, density and surface gravity. 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.The ordering may be different depending on whether one chooses radius or mass, because some objects are denser than others. For instance Uranus is bigger than Neptune but less massive, and although Ganymede and Titan are larger than Mercury, they have less than half its mass. This means some objects in the lower tables, despite their smaller radii, may be more massive than objects in the upper tables because they have a higher density.Many trans-Neptunian objects (TNOs) have been discovered, and their approximate locations in this list are shown, even though there can be a large uncertainty in their measurement.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 the gravity of their mass is sufficient to overcome the structural strength of their material. These are dubbed "regular". Objects made of ice become regular more easily than those made of rock, and many icy objects are spheroidal at far lower sizes. The cutoff boundary for regularity is somewhere between 100 km and 200 km in radius.The larger objects in the mass range between 1018 kg to 1021 kg (1 to 1000 zettagrams [Zg]), such as Tethys, Ceres, and Mimas, have relaxed to an oblate-spheroid equilibrium due to their gravity, while the less massive rubble piles (e.g. Amalthea and Janus) are roughly rounded, but not spherical, dubbed "irregular".Spheroidal bodies typically have some polar flattening due to the centrifugal force from their rotation, but a characteristic feature of the "irregular"-shaped bodies is that there is a significant difference in the length of their two equatorial diameters.There can be difficulty in figuring out 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 "unreferenced wiki-assumed" masses/densities. Many TNOs are just assumed to have a density of 2.0 g/cm3, though it is just as likely that they have a comet-like density of only 0.5 g/cm3. Thus most provisional TNOs are not given an MEarth value to prevent from cluttering the list with too many assumptions that could be off by an order of magnitude. For example, if a TNO is poorly assumed to have a mass of 3.59×1020 kg based on a radius of 350 km with a density of 2 g/cm3 and is later discovered to only have a radius of 175 km with a density of 1 g/cm3, the mass estimate would be only 2.24×1019 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. But many of the moons with a radius less than ~100 km, such as Jupiter's Himalia, still have unknown masses with assumed densities. Again, as we get further from the Sun than Saturn, things get less clear. There has not yet been an orbiter around Uranus or Neptune for long-term study of the 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, have somewhat contradictory size and albedo estimates depending on which research paper is being cited.Data for objects has varying reliability including uncertainties in the figures for mass and radius, and irregularities in the shape and density, with accuracy often depending on how close it is to Earth or if it has been visited by a probe.".
- List_of_Solar_System_objects_by_size thumbnail Graph_showing_relative_masses_2.png?width=300.
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- List_of_Solar_System_objects_by_size wikiPageExternalLink astmass.txt.
- List_of_Solar_System_objects_by_size wikiPageExternalLink asteroidfact.html.
- List_of_Solar_System_objects_by_size wikiPageExternalLink planetfact.html.
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- List_of_Solar_System_objects_by_size wikiPageExternalLink diamalb.tab.
- List_of_Solar_System_objects_by_size wikiPageExternalLink NumberedMPs.txt.
- List_of_Solar_System_objects_by_size wikiPageExternalLink asteroidmoons.html.
- List_of_Solar_System_objects_by_size wikiPageExternalLink all-known-bodies-in-solar-system.html.
- List_of_Solar_System_objects_by_size wikiPageExternalLink 00001618.
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- List_of_Solar_System_objects_by_size wikiPageExternalLink asteroids_comets_sc_0-000-100_2010.png.
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- List_of_Solar_System_objects_by_size wikiPageExternalLink diamalb.tab.
- List_of_Solar_System_objects_by_size wikiPageExternalLink imps.html.
- List_of_Solar_System_objects_by_size wikiPageID "594550".
- List_of_Solar_System_objects_by_size wikiPageRevisionID "606741746".
- List_of_Solar_System_objects_by_size hasPhotoCollection List_of_Solar_System_objects_by_size.
- List_of_Solar_System_objects_by_size subject Category:Lists_of_Solar_System_objects.
- List_of_Solar_System_objects_by_size comment "This is a list of Solar System objects by size, arranged in descending order of mean volumetric radius. The list can also be partially sorted according to an object's mass and, for the largest objects, volume, density and surface gravity.".
- List_of_Solar_System_objects_by_size label "List of Solar System objects by size".
- List_of_Solar_System_objects_by_size label "Lista obiektów w Układzie Słonecznym ze względu na promień".
- List_of_Solar_System_objects_by_size label "Liste der massereichsten Objekte im Sonnensystem".
- List_of_Solar_System_objects_by_size label "Liste des objets du Système solaire classés par taille".
- List_of_Solar_System_objects_by_size label "Список объектов Солнечной системы по размеру".
- List_of_Solar_System_objects_by_size label "大きさ順の太陽系天体の一覧".
- List_of_Solar_System_objects_by_size label "太阳系天体大小列表".
- List_of_Solar_System_objects_by_size sameAs Liste_der_massereichsten_Objekte_im_Sonnensystem.
- List_of_Solar_System_objects_by_size sameAs Eguzki_Sistemako_objektuen_zerrenda_tamainaren_arabera.
- List_of_Solar_System_objects_by_size sameAs Liste_des_objets_du_Système_solaire_classés_par_taille.
- List_of_Solar_System_objects_by_size sameAs Oggetti_del_sistema_solare_per_dimensione.
- List_of_Solar_System_objects_by_size sameAs 大きさ順の太陽系天体の一覧.
- List_of_Solar_System_objects_by_size sameAs 반지름순_태양계_천체_목록.
- List_of_Solar_System_objects_by_size sameAs Lista_obiektów_w_Układzie_Słonecznym_ze_względu_na_promień.
- List_of_Solar_System_objects_by_size sameAs Q514436.
- List_of_Solar_System_objects_by_size sameAs Q514436.
- List_of_Solar_System_objects_by_size wasDerivedFrom List_of_Solar_System_objects_by_size?oldid=606741746.
- List_of_Solar_System_objects_by_size depiction Graph_showing_relative_masses_2.png.
- List_of_Solar_System_objects_by_size isPrimaryTopicOf List_of_Solar_System_objects_by_size.