List Of Solar System Objects By Radius

This is a list of solar system objects by radius, in decreasing order. In the case of the Sun, Jupiter, and Saturn, the volumetric mean radius is used. For mostly spherical objects (oblate) such as planets and large planetoids, the equatorial radius is used. For irregular objects, the radii along three axes are given. The ordering is not the same as the order of a list of solar system objects by 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. The list is incomplete because the radii of many asteroids are not accurately known, or even well-defined in the case of irregular objects. Sun>
96,000 km
a href="/encyclopedia/Jupiter-(planet)" title="Jupiter (planet)">Jupiter 69,911
a href="/encyclopedia/Saturn-(planet)" title="Saturn (planet)">Saturn 58,232
a href="/encyclopedia/Uranus-(planet)" title="Uranus (planet)">Uranus 25,559
a href="/encyclopedia/Neptune-(planet)" title="Neptune (planet)">Neptune 24,764
a href="/encyclopedia/Earth" title="Earth">Earth 6,378
a href="/encyclopedia/Venus-(planet)" title="Venus (planet)">Venus 6,052
a href="/encyclopedia/Mars" title="Mars">Mars 3,397
a href="/encyclopedia/Ganymede-(moon)" title="Ganymede (moon)">Ganymede 2,631
a href="/encyclopedia/Titan-(moon)" title="Titan (moon)">Titan 2,575
a href="/encyclopedia/Mercury-(planet)" title="Mercury (planet)">Mercury 2,440
a href="/encyclopedia/Callisto-(moon)" title="Callisto (moon)">Callisto 2,410
a href="/encyclopedia/Io-(moon)" title="Io (moon)">Io 1,822
a href="/encyclopedia/Moon" title="Moon">Moon 1,738
a href="/encyclopedia/Europa-(moon)" title="Europa (moon)">Europa 1,561
a href="/encyclopedia/Triton-(moon)" title="Triton (moon)">Triton 1,353
a href="/encyclopedia/Pluto-(planet)" title="Pluto (planet)">Pluto 1,195
a href="/encyclopedia/90377-Sedna" title="90377 Sedna">90377 Sedna >800
a href="/encyclopedia/90482-Orcus" title="90482 Orcus">90482 Orcus 800
a href="/encyclopedia/Titania-(moon)" title="Titania (moon)">Titania 789
a href="/encyclopedia/Rhea-(moon)" title="Rhea (moon)">Rhea 764
a href="/encyclopedia/Oberon-(moon)" title="Oberon (moon)">Oberon 761
a href="/encyclopedia/Iapetus-(moon)" title="Iapetus (moon)">Iapetus 718
a href="/encyclopedia/50000-Quaoar" title="50000 Quaoar">50000 Quaoar ~600
a href="/encyclopedia/Charon-(moon)" title="Charon (moon)">Charon 593
a href="/encyclopedia/Umbriel-(moon)" title="Umbriel (moon)">Umbriel 585
a href="/encyclopedia/Ariel-(moon)" title="Ariel (moon)">Ariel 581 × 578 × 578
a href="/encyclopedia/Dione-(moon)" title="Dione (moon)">Dione 560
a href="/encyclopedia/28978-Ixion" title="28978 Ixion">28978 Ixion 532
a href="/encyclopedia/Tethys-(moon)" title="Tethys (moon)">Tethys 536 × 528 × 526
a href="/encyclopedia/20000-Varuna" title="20000 Varuna">20000 Varuna ~500
a href="/encyclopedia/1-Ceres" title="1 Ceres">1 Ceres 485
a href="/encyclopedia/2-Pallas" title="2 Pallas">2 Pallas 285
a href="/encyclopedia/4-Vesta" title="4 Vesta">4 Vesta 234
a href="/encyclopedia/10-Hygiea" title="10 Hygiea">10 Hygiea 204
..
a href="/encyclopedia/3-Juno" title="3 Juno">3 Juno 117
..
a href="/encyclopedia/45-Eugenia" title="45 Eugenia">45 Eugenia 113
..
a href="/encyclopedia/2060-Chiron" title="2060 Chiron">2060 Chiron 90
..
The rankings of some remaining natural satellites are shown below. There are various asteroids larger than many of these, but the exact sizes of many asteroids are not known precisely enough although asteroid diameters can sometimes be determined by timing stellar occultations. In any case many asteroids are known to be highly irregular in shape—some are not even approximately spherical—making any comparison of radii infeasible even if exact figures are known. Enceladus>
256 × 247 × 245
Miranda 240 × 234 × 233
Proteus 220 × 208 × 202
Mimas 209 × 196 × 191
Hyperion 185 × 140 × 113
Nereid 170
Amalthea 131 × 73 × 67
Phoebe 115 × 110 × 105
Larissa 108 × 102 × 84
Galatea 102 × 92 × 72
Janus 97 × 95 × 77
Sycorax 95
Despina 90 × 74 × 64
Himalia 85
Puck 81
Portia 68
Prometheus 74 × 50 × 34
Epimetheus 69 × 55 × 55
Thebe 55 × 45
Pandora 55 × 44 × 31
Thalassa 54 × 50 × 26
Caliban 48
Naiad 48 × 30 × 26
Juliet 47
Belinda 40
Cressida 40
Elara 40
Rosalind 36
Desdemona 32
Bianca 27
Ophelia 21
Cordelia 20
Metis 20
Pasiphaë 18
Carme 15
Sinope 14
Lysithea 12
Adrastea 13 × 10 × 8
Phobos 13.4 × 11.2 × 9.2
Ananke 10
Pan 10
Deimos 7.5 × 6.1 × 5.2

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