List of solar system objects by radius

From Wikipedia, the free encyclopedia

List of solar system objects: By orbit—By mass—By radius—By name
See also: Solar system

This is a list of solar system objects by radius, arranged in descending order of mean volumetric radius. This list is not exhaustive; it contains the Sun, the planets, several natural satellites, and a number of other notable objects.

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.

Several new trans-Neptunian objects have been discovered of significant size. While their radius remains provisional due to the recency of discovery, and is often expressed as a range, the approximate locations in this list are shown.

Rank Body Image Mean Radius (km) Mean Radius (vs. Earth) Volume (billion km3) Volume (vs. Earth)
1 Sun 696000 109.25 1412000000 1303781
2 Jupiter 69911 10.97 1431280 1321
3 Saturn 58232 9.14 827130 764
4 Uranus 25362 3.98 68340 63.1
5 Neptune 24622 3.87 62540 57.7
6 Earth 6371.0 1 1083.21 1
7 Venus 6051.8 0.950 928.43 0.857
8 Mars 3390.0 0.532 163.18 0.151
9 Ganymede* 2631.2 0.413 76.30 0.0704
10 Titan* 2575 0.404 71.52 0.0660
11 Mercury 2439.7 0.383 60.83 0.0562
12 Callisto* 2410.3 0.378 58.65 0.0541
13 Io* 1821.5 28.6% 25.32 2.34%
14 Moon 1737.1 27.3% 21.958 2.03%
15 Europa* 1561 24.5% 15.93 1.47%
16 Triton* 1353.4 21.2% 10.38 0.96%
17 Eris*** 1200 ± 50 19% 7 0.7%
18 Pluto 1153 18.1% 6.39 0.59%
(136472) 2005 FY9*** 800-1000 12.6-15.7%
Titania** 788.9 12.4% 2.06 0.19%
Rhea** 764.4 12.0% 1.87 0.17%
Oberon* 761.4 12.0% 1.85 0.17%
(136108) 2003 EL61*** ~745 (980 x 759 x 498) 11.7%
90377 Sedna*** 590-900 9-14%
Iapetus* 736 11.3% 1.55 0.14%
90482 Orcus*** 420-940 6.6-14.8%
50000 Quaoar* 535-725 8.4-11.4%
Charon* 606 9.5% 0.87 93 0.09%
Umbriel* 584.7 9.2% 0.84 0.08%
Ariel** 578.9 9.1% 0.81 0.08%
Dione* 561.6 8.8% 0.73 0.07%
Tethys** 533 8.3% 0.624 0.06%
(84522) 2002 TC302*** 470-595
Ceres** 475 7.6% 0.437 0.04%
20000 Varuna*** 380-510 8.3% 0.624 0.06%
(55637) 2002 UX25*** 419
28978 Ixion* <411 7.3% 0.421 0.038%
2002 MS4*** 210-595
2003 MW12*** ~382
2006 QH181*** ~382
2004 XR190*** 250-500
(145452) 2005 RN43*** ~365
(24835) 1995 SM55*** ~352
(55565) 2002 AW197*** 325-375
(90568) 2004 GV9*** ~348
(145453) 2005 RR43*** ~348
2003 AZ84*** 343
(120178) 2003 OP32*** ~333
(42301) 2001 UR163*** ~318
(84922) 2003 VS2*** ~318
(15874) 1996 TL66*** ~316
(55636) 2002 TX300*** 265?-355
(119951) 2002 KX14*** ~290
2003 QW90*** ~290
(120347) 2004 SB60*** ~290
(145451) 2005 RM43*** ~290
19521 Chaos*** ~280
(120348) 2004 TY364*** ~277
(19308) 1996 TO66*** 165-375
4 Vesta** 265 4.2% 0.078 0.007%
2 Pallas** 265 4.2% 0.078 0.007%
2002 KW14*** ~264
2004 PR107*** ~264
(144897) 2004 UX10*** ~264
Enceladus** 252.1 3.9% 0.067 0.006%
(26375) 1999 DE9*** ~252
2001 QF298*** ~252
(145480) 2005 TB190*** ~252
38628 Huya*** 150-350
Miranda** 235.8 3.7% 0.055 0.005%
2003 QX113*** ~230
(35671) 1998 SN165*** ~229
2000 CN105*** ~220
2002 XV93*** ~220
(120132) 2003 FY128*** ~220
(82075) 2000 YW134*** ~216
1999 CD158*** ~210
2002 CY248*** ~210
(119979) 2002 WC19*** ~210
Proteus** 209 3.3% 0.038 0.0035%
10 Hygiea** 205 3.2% 0.036 0.003%
(47171) 1999 TC36*** ~205
(26181) 1996 GQ21*** ~200
2003 UZ117*** ~200
2006 HH123*** ~200
Mimas** 198.3 3.1% 0.033 0.003%
* Using equatorial radius and assuming body is spherical
** Using three radii and assuming body is spheroid
*** Radius is known only very approximately

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