List of Solar System objects by radius

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Lists of Solar System objects
by orbit · by mass · by radius · by name · by surface gravity
Natural satellites
by primary · by diameter · by date of discovery · by name
A chart displaying rough sizes of bodies in the Solar System.
A chart displaying rough sizes of bodies in the 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.

[edit] List

Rank Body Image Mean radius
(km)
Margin
of error
Mean radius
(R)
Volume
(109 km³)
Volume
(V)
1 Sun 696,000 109.25 1,412,000,000 1,303,781
2 Jupiter 69,911 10.97 1,431,280 1,321
3 Saturn 58,232 9.14 827,130 764
4 Uranus 25,362 3.98 68,340 63.1
5 Neptune 24,622 3.87 62,540 57.7
6 Earth 6,371.0 1 1,083.21 1
7 Venus 6,051.8 0.950 928.43 0.857
8 Mars 3,390.0 0.532 163.18 0.151
9 Ganymede 2,631.2 0.413 76.30 0.0704
10 Titan 2,575 0.404 71.52 0.0660
11 Mercury 2,439.7 0.383 60.83 0.0562
12 Callisto 2,410.3 0.378 58.65 0.0541
13 Io 1,821.5 28.6% 25.32 2.34%
14 Moon 1,737.1 27.3% 21.958 2.03%
15 Europa 1,561 24.5% 15.93 1.47%
16 Triton 1,353.4 21.2% 10.38 0.96%
17 Eris* 1,300 +200 / -100 19% 7 0.7%
18 Pluto 1,195 18.7% 7.15 0.66%
(136472) 2005 FY9* 900 ±100 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* 745 ±155 9-14%
Iapetus 736 11.3% 1.55 0.14%
50000 Quaoar 630 ±95 8.4-11.4%
Charon 606 9.5% 0.87 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* 532 ±62
Ceres 475 7.6% 0.437 0.04%
90482 Orcus* 473 ±36 6.9-8.0%
20000 Varuna* 445 ±65 8.3% 0.624 0.06%
28978 Ixion 411 - 7.3% 0.421 0.038%
2003 MW12* 382 ?
2006 QH181* 382 ?
2004 XR190* 375 ±125
(145452) 2005 RN43* 365 ?
2002 MS4* 363 ±62
(24835) 1995 SM55* 352 ?
(55565) 2002 AW197* 350 ±25
(90568) 2004 GV9* 348 ?
(145453) 2005 RR43* 348 ?
2003 AZ84* 343
(55637) 2002 UX25* 342 ±57
(120178) 2003 OP32* 333 ?
(42301) 2001 UR163* 318 ?
(84922) 2003 VS2* 318 ?
(15874) 1996 TL66* 316 ?
(55636) 2002 TX300* 310 ±45
2003 QW90* 290 ?
(120347) 2004 SB60* 290 ?
(145451) 2005 RM43* 290 ?
(119951) 2002 KX14* 280 ?
19521 Chaos* 280 ?
(120348) 2004 TY364* 277 ?
(19308) 1996 TO66* 270 ±105
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* 250 ±100
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
A relative comparison of some of the mid-sized bodies in the Solar System.
A relative comparison of some of the mid-sized bodies in the Solar System.

[edit] See also

[edit] External links