List of natural satellites

The Solar System's planets, and its most likely dwarf planets, are known to be orbited by at least 219 natural satellites, or moons. 19 of them are large enough to be gravitationally rounded; of these, all are covered by a crust of ice except for Earth's Moon and Io. Several of the largest ones are in hydrostatic equilibrium and would therefore be considered dwarf planets or planets if they were in direct orbit around the Sun and not in their current states.
Moons are classed in two separate categories according to their orbits: regular moons, which have prograde orbits and lie close to the plane of their equators, and irregular moons, whose orbits can be pro- or retrograde and often lie at extreme angles to their planets' equators. Irregular moons are probably minor planets that have been captured from surrounding space. Most irregular moons are less than in diameter.
The earliest published discovery of a moon other than the Earth's was by Galileo Galilei, who discovered the four Galilean moons orbiting Jupiter in 1610. Over the following three centuries only a few more moons were discovered. Missions to other planets in the 1970s, most notably the Voyager 1 and 2 missions, saw a surge in the number of moons detected, and observations since the year 2000, using mostly large, ground-based optical telescopes, have discovered many more, all of which are irregular.

Moons by primary

, the smallest and innermost planet, has no moons, or at least none that can be detected to a diameter of. For a very short time in 1974, Mercury was thought to have a moon.
Venus also has no moons, though reports of a moon around Venus have circulated since the 17th century.
Earth has one Moon, the largest moon of any rocky planet in the Solar System. Earth also has at least two co-orbitals: the asteroids 3753 Cruithne and 2002 AA₂₉; however, since they do not orbit Earth, they are not considered moons.
Mars has two known moons, Phobos and Deimos. Searches for more satellites have been unsuccessful, putting the maximum radius of any other satellites at.
Jupiter has 79 moons with known orbits, of which 72 have confirmed orbits and have thus received permanent designations; of these, 57 have been named. Its eight regular moons are grouped into the planet-sized Galilean moons and the far smaller Amalthea group. They are named after lovers of Zeus, the Greek equivalent of Jupiter. Its 71 known irregular moons are organized into two categories: prograde and retrograde. The prograde satellites consist of the Himalia group and three others in groups of one. The retrograde moons are grouped into the Carme, Ananke and Pasiphae groups.
Saturn has 82 moons with known orbits; 53 of them have names, and these are the ones with confirmed orbits. Most of them are quite small. Seven moons are large enough to be in hydrostatic equilibrium, including Titan, the second largest moon in the Solar System. Including these large moons, 24 of Saturn's moons are regular, and traditionally named after Titans or other figures associated with the mythological Saturn. The remaining 58, all small, are irregular, and classified by their orbital characteristics into Inuit, Norse, and Gallic groups, and their names are chosen from the corresponding mythologies. The rings of Saturn are made up of icy objects ranging in size from one centimetre to hundreds of metres, each of which is on its own orbit about the planet. Thus a precise number of Saturnian moons cannot be given, as there is no objective boundary between the countless small anonymous objects that form Saturn's ring system and the larger objects that have been named as moons. At least 150 "moonlets" embedded in the rings have been detected by the disturbance they create in the surrounding ring material, though this is thought to be only a small sample of the total population of such objects.
Uranus has 27 moons, five of which are massive enough to have achieved hydrostatic equilibrium. There are 13 moons that orbit within Uranus's ring system, and another nine outer irregular moons. Unlike most planetary moons, which are named from antiquity, all the moons of Uranus are named after characters from the works of Shakespeare and Alexander Pope's work The Rape of the Lock.
Neptune has 14 moons; the largest, Triton, accounts for more than 99.5 percent of all the mass orbiting the planet. Triton is large enough to have achieved hydrostatic equilibrium, but, uniquely for a large moon, has a retrograde orbit, suggesting it was a dwarf planet that was captured. Neptune also has seven known inner regular satellites, and six outer irregular satellites.
Pluto, a dwarf planet, has five moons. Its largest moon Charon, named after the ferryman who took souls across the River Styx, is more than half as large as Pluto itself, and large enough to orbit a point outside Pluto's surface. In effect, each orbits the other, forming a binary system informally referred to as a double-dwarf-planet. Pluto's four other moons, Nix, Hydra, Kerberos and Styx are far smaller and orbit the Pluto–Charon system.
Among the other dwarf planets, has no known moons. It is 90 percent certain that Ceres has no moons larger than 1 km in size, assuming that they would have the same albedo as Ceres itself. has one known moon, Dysnomia. Accurately determining its size is difficult: one indicative estimate of its radius is, but on some assumptions could be as high as.
Two objects were named as dwarf planets, under the expectation that they would prove to be so. has two moons, Hiʻiaka and Namaka, of radii ~195 and ~100 km, respectively. has one moon, discovered in April 2016.
A number of other objects in the Kuiper belt and scattered disk may turn out to be dwarf planets. 90482 Orcus was found to have a natural satellite, later named Vanth, in 2005. 50000 Quaoar, 225088 Gonggong, 120347 Salacia and 174567 Varda have all since been discovered to have moons.
, 288 asteroid moons and 107 trans-Neptunian moons had been discovered.

List

This is a list of the recognized moons of the planets and of the largest potential dwarf planets of the Solar System, ordered by their official Roman numeral designations. The 19 moons that are large enough to have been rounded by their own gravity are listed in bold. The seven largest moons, which are larger than any of the known dwarf planets, are listed in bold and italic. Sidereal period differs from semi-major axis because a moon's speed depends both on the mass of its primary and its distance from it.

Image	Parent	Numeral	Name	Mean radius	Semi-major axis	Sidereal period	Discovery year	Discovered by	Notes	Ref
	Earth	I	Moon		384,399	27.321582		—	Synchronous rotation
	Mars	I	Phobos		9,380	0.319	1877	Hall
	Mars	II	Deimos		23,460	1.262	1877	Hall
	Jupiter	I	Io		421,800	1.769	1610	Galileo	Main-group moon
	Jupiter	II	Europa		671,100	3.551	1610	Galileo	Main-group moon
	Jupiter	III	Ganymede		1,070,400	7.155	1610	Galileo	Main-group moon
	Jupiter	IV	Callisto		1,882,700	16.69	1610	Galileo	Main-group moon
	Jupiter	V	Amalthea		181,400	0.498	1892	Barnard	Inner moon
	Jupiter	VI	Himalia		11,461,000	250.56	1904	Perrine	Prograde irregular
	Jupiter	VII	Elara		11,741,000	259.64	1905	Perrine	Prograde irregular
	Jupiter	VIII	Pasiphae		23,624,000	743.63	1908	Melotte	Retrograde irregular
	Jupiter	IX	Sinope		23,939,000	758.90	1914	Nicholson	Retrograde irregular
	Jupiter	X	Lysithea		11,717,000	259.20	1938	Nicholson	Prograde irregular
	Jupiter	XI	Carme		23,404,000	734.17	1938	Nicholson	Retrograde irregular
	Jupiter	XII	Ananke		21,276,000	629.77	1951	Nicholson	Retrograde irregular
	Jupiter	XIII	Leda		11,165,000	240.92	1974	Kowal	Prograde irregular
	Jupiter	XIV	Thebe		221,900	0.675	1979	Synnott	Inner moon
	Jupiter	XV	Adrastea		129,000	0.298	1979	Jewitt, Danielson	Inner moon
	Jupiter	XVI	Metis		128,000	0.295	1979	Synnott	Inner moon
	Jupiter	XVII	Callirrhoe		24,103,000	758.77	2000	Scotti, Spahr, McMillan, Larsen, Montani, Gleason, Gehrels	Retrograde irregular
	Jupiter	XVIII	Themisto		7,284,000	130.02	1975/2000	Kowal and Roemer ; Sheppard, Jewitt, Fernández, Magnier	Prograde irregular
Jupiter	XIX	Megaclite		23,493,000	752.86	2000	Sheppard, Jewitt, Fernández, Magnier, Dahm, Evans	Retrograde irregular		-
Jupiter	XX	Taygete		23,280,000	732.41	2000	Sheppard, Jewitt, Fernández, Magnier, Dahm, Evans	Retrograde irregular		-
Jupiter	XXI	Chaldene		23,100,000	723.72	2000	Sheppard, Jewitt, Fernández, Magnier, Dahm, Evans	Retrograde irregular		-
Jupiter	XXII	Harpalyke		20,858,000	623.32	2000	Sheppard, Jewitt, Fernández, Magnier, Dahm, Evans	Retrograde irregular		-
Jupiter	XXIII	Kalyke		23,483,000	742.06	2000	Sheppard, Jewitt, Fernández, Magnier, Dahm, Evans	Retrograde irregular		-
Jupiter	XXIV	Iocaste		21,060,000	631.60	2000	Sheppard, Jewitt, Fernández, Magnier, Dahm, Evans	Retrograde irregular		-
Jupiter	XXV	Erinome		23,196,000	728.46	2000	Sheppard, Jewitt, Fernández, Magnier, Dahm, Evans	Retrograde irregular		-
Jupiter	XXVI	Isonoe		23,155,000	726.23	2000	Sheppard, Jewitt, Fernández, Magnier, Dahm, Evans	Retrograde irregular		-
Jupiter	XXVII	Praxidike		20,908,000	625.39	2000	Sheppard, Jewitt, Fernández, Magnier, Dahm, Evans	Retrograde irregular		-
Jupiter	XXVIII	Autonoe		24,046,000	760.95	2001	Sheppard, Jewitt, Kleyna	Retrograde irregular		-
Jupiter	XXIX	Thyone		20,939,000	627.21	2001	Sheppard, Jewitt, Kleyna	Retrograde irregular		-
	Jupiter	XXX	Hermippe		21,131,000	633.9	2001	Sheppard, Jewitt, Kleyna	Retrograde irregular
Jupiter	XXXI	Aitne		23,229,000	730.18	2001	Sheppard, Jewitt, Kleyna	Retrograde irregular		-
Jupiter	XXXII	Eurydome		22,865,000	717.33	2001	Sheppard, Jewitt, Kleyna	Retrograde irregular		-
Jupiter	XXXIII	Euanthe		20,797,000	620.49	2001	Sheppard, Jewitt, Kleyna	Retrograde irregular		-
Jupiter	XXXIV	Euporie		19,304,000	550.74	2001	Sheppard, Jewitt, Kleyna	Retrograde irregular		-
Jupiter	XXXV	Orthosie		20,720,000	622.56	2001	Sheppard, Jewitt, Kleyna	Retrograde irregular		-
Jupiter	XXXVI	Sponde		23,487,000	748.34	2001	Sheppard, Jewitt, Kleyna	Retrograde irregular		-
Jupiter	XXXVII	Kale		23,217,000	729.47	2001	Sheppard, Jewitt, Kleyna	Retrograde irregular		-
Jupiter	XXXVIII	Pasithee		23,004,000	719.44	2001	Sheppard, Jewitt, Kleyna	Retrograde irregular		-
Jupiter	XXXIX	Hegemone		23,577,000	739.88	2003	Sheppard, Jewitt, Kleyna, Fernández	Retrograde irregular		-
Jupiter	XL	Mneme		21,035,000	620.04	2003	Gladman, Allen	Retrograde irregular		-
Jupiter	XLI	Aoede		23,980,000	761.50	2003	Sheppard, Jewitt, Kleyna, Fernández, Hsieh	Retrograde irregular		-
Jupiter	XLII	Thelxinoe		21,164,000	628.09	2003	Sheppard, Jewitt, Kleyna, Gladman, Kavelaars, Petit, Allen	Retrograde irregular		-
	Jupiter	XLIII	Arche		23,355,000	731.95	2002	Sheppard, Meech, Hsieh, Tholen, Tonry	Retrograde irregular
Jupiter	XLIV	Kallichore		23,288,000	728.73	2003	Sheppard, Jewitt, Kleyna, Fernández	Retrograde irregular		-
Jupiter	XLV	Helike		21,069,000	626.32	2003	Sheppard, Jewitt, Kleyna, Fernández, Hsieh	Retrograde irregular		-
Jupiter	XLVI	Carpo		17,058,000	456.30	2003	Sheppard, Gladman, Kavelaars, Petit, Allen, Jewitt, Kleyna	Prograde irregular		-
Jupiter	XLVII	Eukelade		23,328,000	730.47	2003	Sheppard, Jewitt, Kleyna, Fernández, Hsieh	Retrograde irregular		-
Jupiter	XLVIII	Cyllene		23,809,000	752	2003	Sheppard, Jewitt, Kleyna	Retrograde irregular		-
Jupiter	XLIX	Kore		24,543,000	779.17	2003	Sheppard, Jewitt, Kleyna	Retrograde irregular		-
Jupiter	L	Herse		22,983,000	714.51	2003	Gladman, Sheppard, Jewitt, Kleyna, Kavelaars, Petit, Allen	Retrograde irregular		-
Jupiter	LI	S/2010 J 1		23,314,335	723.2	2010	Jacobson, Brozović, Gladman, Alexandersen	Retrograde irregular		-
Jupiter	LII	S/2010 J 2		20,307,150	588.1	2010	Veillet	Retrograde irregular		-
Jupiter	LIII	Dia		12,570,000	287.93	2000	Sheppard, Jewitt, Kleyna, Fernández, Hsieh	Prograde irregular		-
Jupiter	LIV	S/2016 J 1		20,595,480	602.7	2016	Sheppard	Retrograde irregular		-
Jupiter	LV	S/2003 J 18		20,426,000	596.58	2003	Gladman, Sheppard, Jewitt, Kleyna, Kavelaars, Petit, Allen	Retrograde irregular		-
Jupiter	LVI	S/2011 J 2		23,329,710	726.8	2011	Sheppard	Retrograde irregular		-
Jupiter	LVII	Eirene		23,498,000	738.74	2003	Sheppard, Jewitt, Kleyna, Fernández, Hsieh	Retrograde irregular		-
Jupiter	LVIII	Philophrosyne		22,630,000	689.77	2003	Sheppard, Jewitt, Kleyna, Fernández	Retrograde irregular		-
Jupiter	LIX	S/2017 J 1		23,483,978	734.2	2017	Sheppard	Retrograde irregular		-
Jupiter	LX	Eupheme		20,224,000	583.88	2003	Sheppard, Jewitt, Kleyna, Fernández, Hsieh	Retrograde irregular		-
Jupiter	LXI	S/2003 J 19		23,535,000	740.43	2003	Gladman, Sheppard, Jewitt, Kleyna, Kavelaars, Petit, Allen	Retrograde irregular		-
Jupiter	LXII	Valetudo		18,928,095	532.0	2016	Sheppard	Prograde irregular		-
Jupiter	LXIII	S/2017 J 2		23,240,957	723.8	2017	Sheppard	Retrograde irregular		-
Jupiter	LXIV	S/2017 J 3		20,639,315	605.8	2017	Sheppard	Retrograde irregular		-
Jupiter	LXV	Pandia		11,494,801	251.8	2017	Sheppard	Prograde irregular		-
Jupiter	LXVI	S/2017 J 5		23,169,389	720.5	2017	Sheppard	Retrograde irregular		-
Jupiter	LXVII	S/2017 J 6		22,394,682	684.7	2017	Sheppard	Retrograde irregular		-
Jupiter	LXVIII	S/2017 J 7		20,571,458	602.8	2017	Sheppard	Retrograde irregular		-
Jupiter	LXIX	S/2017 J 8		23,174,446	720.7	2017	Sheppard	Retrograde irregular		-
Jupiter	LXX	S/2017 J 9		21,429,955	640.9	2017	Sheppard	Retrograde irregular		-
Jupiter	LXXI	Ersa	1.5	11,453,004	250.4	2018	Sheppard	Retrograde irregular		-
Jupiter	LXXII	S/2011 J 1		20,155,290	580.7	2011	Sheppard	Retrograde irregular		-
Jupiter	—	S/2003 J 2		28,455,000	981.55	2003	Sheppard, Jewitt, Kleyna, Fernández, Hsieh	Retrograde irregular		-
Jupiter	—	S/2003 J 4		23,933,000	755.26	2003	Sheppard, Jewitt, Kleyna, Fernández, Hsieh	Retrograde irregular		-
Jupiter	—	S/2003 J 9		23,388,000	733.30	2003	Sheppard, Jewitt, Kleyna, Fernández	Retrograde irregular		-
Jupiter	—	S/2003 J 10		23,044,000	716.25	2003	Sheppard, Jewitt, Kleyna, Fernández	Retrograde irregular		-
Jupiter	—	S/2003 J 12		17,833,000	489.72	2003	Sheppard, Jewitt, Kleyna, Fernández	Retrograde irregular		-
Jupiter	—	S/2003 J 16		20,956,000	616.33	2003	Gladman, Sheppard, Jewitt, Kleyna, Kavelaars, Petit, Allen	Retrograde irregular		-
	Jupiter	—	S/2003 J 23		23,566,000	732.45	2004	Sheppard, Jewitt, Kleyna, Fernández	Retrograde irregular
	Saturn	I	Mimas		185,540	0.942	1789	Herschel	Main-group moon
	Saturn	II	Enceladus		238,040	1.370	1789	Herschel	Main-group moon
	Saturn	III	Tethys		294,670	1.888	1684	Cassini	Main-group moon
	Saturn	IV	Dione		377,420	2.737	1684	Cassini	Main-group moon
	Saturn	V	Rhea		527,070	4.518	1672	Cassini	Main-group moon
	Saturn	VI	Titan		1,221,870	15.95	1655	Huygens	Main-group moon
	Saturn	VII	Hyperion		1,500,880	21.28	1848	W.Bond, G. Bond, and Lassell	Main-group moon
	Saturn	VIII	Iapetus		3,560,840	79.33	1671	Cassini	Main-group moon
	Saturn	IX	Phoebe		12,947,780	550.31	1899	Pickering	Retrograde irregular
	Saturn	X	Janus		151,460	0.695	1966	Dollfus; Voyager 1	Inner moon
	Saturn	XI	Epimetheus		151,410	0.694	1966	Walker; Voyager 1	Inner moon
	Saturn	XII	Helene		377,420	2.737	1980	Laques, Lecacheux	Main-group trojan
	Saturn	XIII	Telesto		294,710	1.888	1980	Smith, Reitsema, Larson, Fountain	Main-group trojan
	Saturn	XIV	Calypso		294,710	1.888	1980	Pascu, Seidelmann, Baum, Currie	Main-group trojan
	Saturn	XV	Atlas		137,670	0.602	1980	Terrile	Inner moon
	Saturn	XVI	Prometheus		139,380	0.613	1980	Collins	Inner moon
	Saturn	XVII	Pandora		141,720	0.629	1980	Collins	Inner moon
	Saturn	XVIII	Pan		133,580	0.575	1990	Showalter	Inner moon
	Saturn	XIX	Ymir		23,140,400	1,315.58	2000	Gladman	Retrograde irregular
	Saturn	XX	Paaliaq		15,200,000	686.95	2000	Gladman	Prograde irregular
	Saturn	XXI	Tarvos		17,983,000	926.23	2000	Gladman, Kavelaars	Prograde irregular
Saturn	XXII	Ijiraq		11,124,000	451.42	2000	Gladman, Kavelaars	Prograde irregular		-
Saturn	XXIII	Suttungr		19,459,000	1,016.67	2000	Gladman, Kavelaars	Retrograde irregular		-
	Saturn	XXIV	Kiviuq		11,110,000	449.22	2000	Gladman	Prograde irregular
	Saturn	XXV	Mundilfari		18,628,000	952.77	2000	Gladman, Kavelaars	Retrograde irregular
Saturn	XXVI	Albiorix		16,182,000	783.45	2000	Holman, Spahr	Prograde irregular		-
Saturn	XXVII	Skathi		15,540,000	728.20	2000	Gladman, Kavelaars	Retrograde irregular		-
Saturn	XXVIII	Erriapus		17,343,000	871.19	2000	Gladman, Kavelaars	Prograde irregular		-
Saturn	XXIX	Siarnaq		18,015,400	896.44	2000	Gladman, Kavelaars	Prograde irregular		-
	Saturn	XXX	Thrymr		20,314,000	1,094.11	2000	Gladman, Kavelaars	Retrograde irregular
	Saturn	XXXI	Narvi		19,007,000	1,003.86	2003	Sheppard, Jewitt, Kleyna	Retrograde irregular
	Saturn	XXXII	Methone		194,440	1.010	2004	Porco, Charnoz, Brahic, Dones	Alkyonide moon
	Saturn	XXXIII	Pallene		212,280	1.154	2004	Gordon, Murray, Beurle, et al.	Alkyonide moon
	Saturn	XXXIV	Polydeuces		377,200	2.737	2004	Porco et al.	Main-group trojan
	Saturn	XXXV	Daphnis		136,500	0.594	2005	Porco et al.	Inner moon
Saturn	XXXVI	Aegir		20,751,000	1,117.52	2004	Sheppard, Jewitt, Kleyna, Marsden	Retrograde irregular		-
	Saturn	XXXVII	Bebhionn		17,119,000	834.84	2004	Sheppard, Jewitt, Kleyna, Marsden	Prograde irregular
	Saturn	XXXVIII	Bergelmir		19,336,000	1,005.74	2004	Sheppard, Jewitt, Kleyna, Marsden	Retrograde irregular
Saturn	XXXIX	Bestla		20,192,000	1,088.72	2004	Sheppard, Jewitt, Kleyna, Marsden	Retrograde irregular		-
Saturn	XL	Farbauti		20,377,000	1,085.55	2004	Sheppard, Jewitt, Kleyna, Marsden	Retrograde irregular		-
Saturn	XLI	Fenrir		22,454,000	1,260.35	2004	Sheppard, Jewitt, Kleyna, Marsden	Retrograde irregular		-
	Saturn	XLII	Fornjot		25,146,000	1,494.2	2004	Sheppard, Jewitt, Kleyna, Marsden	Retrograde irregular
Saturn	XLIII	Hati		19,846,000	1,038.61	2004	Sheppard, Jewitt, Kleyna, Marsden	Retrograde irregular		-
Saturn	XLIV	Hyrrokkin		18,437,000	931.86	2004	Sheppard, Jewitt, Kleyna	Retrograde irregular		-
	Saturn	XLV	Kari		22,089,000	1,230.97	2006	Sheppard, Jewitt, Kleyna	Retrograde irregular
Saturn	XLVI	Loge		23,058,000	1,311.36	2006	Sheppard, Jewitt, Kleyna	Retrograde irregular		-
Saturn	XLVII	Skoll		17,665,000	878.29	2006	Sheppard, Jewitt, Kleyna	Retrograde irregular		-
Saturn	XLVIII	Surtur		22,704,000	1,297.36	2006	Sheppard, Jewitt, Kleyna	Retrograde irregular		-
	Saturn	XLIX	Anthe		197,700	1.0365	2007	Porco et al.	Alkyonide moon
Saturn	L	Jarnsaxa		18,811,000	964.74	2006	Sheppard, Jewitt, Kleyna	Retrograde irregular		-
Saturn	LI	Greip		18,206,000	921.19	2006	Sheppard, Jewitt, Kleyna	Retrograde irregular		-
Saturn	LII	Tarqeq		18,009,000	887.48	2007	Sheppard, Jewitt, Kleyna	Prograde irregular		-
	Saturn	LIII	Aegaeon		167,500	0.808	2008	Cassini Imaging Science Team Cassini–Huygens	G-ring moonlet
Saturn	—	S/2004 S 7		20,999,000	1,140.24	2004	Sheppard, Jewitt, Kleyna, Marsden	Retrograde irregular		-
Saturn	—	S/2004 S 12		19,878,000	1,046.19	2004	Sheppard, Jewitt, Kleyna, Marsden	Retrograde irregular		-
Saturn	—	S/2004 S 13		18,404,000	933.48	2004	Sheppard, Jewitt, Kleyna, Marsden	Retrograde irregular		-
Saturn	—	S/2004 S 17		19,447,000	1,014.70	2004	Sheppard, Jewitt, Kleyna, Marsden	Retrograde irregular		-
Saturn	—	S/2006 S 1		18,790,000	963.37	2006	Sheppard, Jewitt, Kleyna	Retrograde irregular		-
Saturn	—	S/2006 S 3		22,096,000	1,227.21	2006	Sheppard, Jewitt, Kleyna	Retrograde irregular		-
Saturn	—	S/2007 S 2		16,725,000	808.08	2007	Sheppard, Jewitt, Kleyna	Retrograde irregular		-
Saturn	—	S/2007 S 3		18,975,000	977.8	2007	Sheppard, Jewitt, Kleyna	Retrograde irregular		-
	Saturn	—	S/2009 S 1		117,000	0.471	2009	Cassini Imaging Science Team Cassini–Huygens	B-ring moonlet
Saturn	—	S/2004 S 20		19,418,000	1,010.55	2019	Sheppard, Jewitt, Kleyna	Retrograde irregular		-
Saturn	—	S/2004 S 21		22,645,000	1,272.61	2019	Sheppard, Jewitt, Kleyna	Retrograde irregular		-
Saturn	—	S/2004 S 22		20,636,000	1,107.13	2019	Sheppard, Jewitt, Kleyna	Retrograde irregular		-
Saturn	—	S/2004 S 23		21,163,000	1,149.82	2019	Sheppard, Jewitt, Kleyna	Retrograde irregular		-
Saturn	—	S/2004 S 24		22,901,000	1,294.25	2019	Sheppard, Jewitt, Kleyna, Marsden	Prograde irregular		-
Saturn	—	S/2004 S 25		21,174,000	1,150.69	2019	Sheppard, Jewitt, Kleyna	Retrograde irregular		-
Saturn	—	S/2004 S 26		26,676,000	1,627.18	2019	Sheppard, Jewitt, Kleyna, Marsden	Retrograde irregular		-
Saturn	—	S/2004 S 27		19,976,000	1,054.45	2019	Sheppard, Jewitt, Kleyna, Marsden, Jacobson	Retrograde irregular		-
Saturn	—	S/2004 S 28		22,020,000	1,220.31	2019	Sheppard, Jewitt, Kleyna, Marsden	Retrograde irregular		-
Saturn	—	S/2004 S 29		16,981,000	826.44	2019	Sheppard, Jewitt, Kleyna, Marsden	Prograde irregular		-
Saturn	—	S/2004 S 30		20,396,000	1,087.84	2019	Sheppard, Jewitt, Kleyna	Retrograde irregular		-
Saturn	—	S/2004 S 31		17,568,000	869.65	2019	Sheppard, Jewitt, Kleyna, Marsden	Prograde irregular		-
Saturn	—	S/2004 S 32		21,214,000	1,153.96	2019	Sheppard, Jewitt, Kleyna	Retrograde irregular		-
Saturn	—	S/2004 S 33		24,168,000	1,403.18	2019	Sheppard, Jewitt, Kleyna	Retrograde irregular		-
Saturn	—	S/2004 S 34		24,299,000	1,414.59	2019	Sheppard, Jewitt, Kleyna	Retrograde irregular		-
Saturn	—	S/2004 S 35		22,412,000	1,253.08	2019	Sheppard, Jewitt, Kleyna, Marsden	Retrograde irregular		-
Saturn	—	S/2004 S 36		23,192,000	1,319.07	2019	Sheppard, Jewitt, Kleyna	Retrograde irregular		-
Saturn	—	S/2004 S 37		15,892,000	748.18	2019	Sheppard, Jewitt, Kleyna	Retrograde irregular		-
Saturn	—	S/2004 S 38		21,908,000	1,211.02	2019	Sheppard, Jewitt, Kleyna	Retrograde irregular		-
Saturn	—	S/2004 S 39		23,575,000	1,351.83	2019	Sheppard, Jewitt, Kleyna	Retrograde irregular		-
	Uranus	I	Ariel		190,900	2.520	1851	Lassell	Main-group moon
	Uranus	II	Umbriel		266,000	4.144	1851	Lassell	Main-group moon
	Uranus	III	Titania		436,300	8.706	1787	Herschel	Main-group moon
	Uranus	IV	Oberon		583,500	13.46	1787	Herschel	Main-group moon
	Uranus	V	Miranda		129,900	1.413	1948	Kuiper	Main-group moon
	Uranus	VI	Cordelia		49,800	0.335	1986	Terrile	Inner moon
	Uranus	VII	Ophelia		53,800	0.376	1986	Terrile	Inner moon
	Uranus	VIII	Bianca		59,200	0.435	1986	Smith	Inner moon
	Uranus	IX	Cressida		61,800	0.464	1986	Synnott	Inner moon
	Uranus	X	Desdemona		62,700	0.474	1986	Synnott	Inner moon
	Uranus	XI	Juliet		64,400	0.493	1986	Synnott	Inner moon
	Uranus	XII	Portia		66,100	0.513	1986	Synnott	Inner moon
	Uranus	XIII	Rosalind		69,900	0.558	1986	Synnott	Inner moon
	Uranus	XIV	Belinda		75,300	0.624	1986	Synnott	Inner moon
	Uranus	XV	Puck		86,000	0.762	1985	Synnott	Inner moon
	Uranus	XVI	Caliban		7,231,100	579.73	1997	Gladman, Nicholson, Burns, Kavelaars	Retrograde irregular
	Uranus	XVII	Sycorax		12,179,400	1,288.38	1997	Gladman, Nicholson, Burns, Kavelaars	Retrograde irregular
	Uranus	XVIII	Prospero		16,256,000	1,978.29	1999	Gladman, Holman, Kavelaars, Petit, Scholl	Retrograde irregular
	Uranus	XIX	Setebos		17,418,000	2,225.21	1999	Gladman, Holman, Kavelaars, Petit, Scholl	Retrograde irregular
	Uranus	XX	Stephano		8,004,000	677.36	1999	Gladman, Holman, Kavelaars, Petit, Scholl	Retrograde irregular
Uranus	XXI	Trinculo		8,504,000	749.24	2001	Holman, Kavelaars, Milisavljevic	Retrograde irregular		-
	Uranus	XXII	Francisco		4,276,000	266.56	2001	Holman, Kavelaars, Milisavljevic, Gladman	Retrograde irregular
Uranus	XXIII	Margaret		14,345,000	1,687.01	2003	Sheppard, Jewitt	Prograde irregular		-
	Uranus	XXIV	Ferdinand		20,901,000	2,887.21	2001	Holman, Kavelaars, Milisavljevic, et al.	Retrograde irregular
	Uranus	XXV	Perdita		76,417	0.638	1999	Karkoschka	Inner moon
	Uranus	XXVI	Mab		97,736	0.923	2003	Showalter, Lissauer	Inner moon
	Uranus	XXVII	Cupid		74,392	0.613	2003	Showalter, Lissauer	Inner moon
	Neptune	I	Triton		354,800	5.877	1846	Lassell	Retrograde irregular
	Neptune	II	Nereid		5,513,820	360.14	1949	Kuiper	Prograde irregular
	Neptune	III	Naiad		48,224	0.294	1989	Terrile	Inner moon
Neptune	IV	Thalassa		50,075	0.311	1989	Terrile	Inner moon		-
	Neptune	V	Despina		52,526	0.335	1989	Synnott	Inner moon
	Neptune	VI	Galatea		61,953	0.429	1989	Synnott	Inner moon
	Neptune	VII	Larissa		73,548	0.555	1982	Reitsema, Hubbard, Lebofsky, Tholen	Inner moon
	Neptune	VIII	Proteus		117,647	1.122	1989	Synnott	Inner moon
	Neptune	IX	Halimede		15,728,000	1,879.71	2002	Holman, Kavelaars, Grav, Fraser, Milisavljevic	Retrograde irregular
	Neptune	X	Psamathe		46,695,000	9,115.91	2003	Jewitt, Kleyna, Sheppard, Holman, Kavelaars	Retrograde irregular
Neptune	XI	Sao		22,422,000	2,914.07	2002	Holman, Kavelaars, Grav, Fraser, Milisavljevic	Prograde irregular		-
Neptune	XII	Laomedeia		23,571,000	3,167.85	2002	Holman, Kavelaars, Grav, Fraser, Milisavljevic	Prograde irregular		-
Neptune	XIII	Neso		48,387,000	9,373.99	2002	Holman, Kavelaars, Grav, Fraser, Milisavljevic	Retrograde irregular		-
	Neptune	XIV	Hippocamp		105,283	0.9362	2013	Showalter et al.	Inner moon
	Orcus	I	Vanth			9.539	2005	Brown & Suer	Synchronous rotation
	Pluto	I	Charon		19,591	6.387	1978	Christy	Synchronous rotation
	Pluto	II	Nix	19.3	48,671	24.85	2005	Weaver, Stern, Buie, et al.	Chaotic rotation
	Pluto	III	Hydra	19.5	64,698	38.20	2005	Weaver, Stern, Buie, et al.	Chaotic rotation
	Pluto	IV	Kerberos	6.3	57,729	32.17	2011	Showalter	Chaotic rotation
	Pluto	V	Styx	5.5	42,393	20.16	2012	Showalter	Chaotic rotation
	Salacia	I	Actaea			5.494	2006	Noll et al.
	Haumea	I	Hiiaka		49,880	49.12	2005	Brown et al.
	Haumea	II	Namaka		25,657	18.2783	2005	Brown et al.
	Quaoar	I	Weywot			12.438	2007	Brown
	Makemake	—	S/2015 1				2016	Parker et al.
	Varda	I	Ilmarë			5.751	2009	Noll et al.
	Gonggong	I	Xiangliu				2010	Marton, Kiss & Müller	assuming a prograde orbit
	Eris	I	Dysnomia			15.774	2005	Brown, Rabinowitz, Trujillo et al.	SDO moon

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