Moons of the Solar System

By: The Editors of Sky & Telescope January 19, 2023 0

Use these up-to-date tables to learn about the moons of the solar system, including the plethora of Jupiter’s moons and the weird menagerie of Saturn’s moons.

Pandora, a moon of Saturn — Cassini snapped this image of Saturn's moon Pandora on December 21, 2016, from a range of 25,200 miles (40,500 kilometers).
*NASA / JPL / Space Science Institute*

There are hundreds of known moons in the solar system, including the dozens of moons circling each of the giant planets (Jupiter, Saturn, Uranus, and Neptune). As of November 2025, the count stood at 429, distributed as follows: Earth 1, Mars 2, Jupiter 97, Saturn 274, Uranus 29, Neptune 16 — and among the IAU-approved dwarf planets: Pluto 5, Haumea 2, Makemake 1, Gonggong 1, Eris 1.

Discovering a new moon in the solar system used to be a rare event. After Gerard Kuiper found Miranda, a moon of Uranus, in 1948 and Seth Nicholson found Ananke, a moon of Jupiter, in 1951, the total count of natural planetary satellites stood at 31: Jupiter's moons numbered 12, followed by the moons of Saturn (9), Uranus (5), Neptune (2), Mars (2), and Earth (1). (Notably, Mercury and Venus are the only planets in the solar system that do not have moons.)

In the ensuing three decades, finding solar system moons largely fell to NASA spacecraft. After Voyager 2's flyby of Neptune in 1989, the total number of solar system moons had nearly doubled to 60. However, the advent of sensitive electronic cameras has put ground-based observers back in the driver's seat, resulting in several dozens of finds over the past few years.

Indeed, some of the new objects are so small, only a few kilometers across, that they stretch the traditional notion of what constitutes a "moon." Sometimes faint objects appear fleetingly in images and are never seen again; others require patient follow-up observations over months or years to confirm that they orbit a planet.

While comets bear the surname(s) of their discoverer(s), and observers retain naming rights for asteroids, those who spot planetary moons must yield naming privilege to the International Astronomical Union. By convention, the IAU does not name a satellite until its orbit is known precisely — a threshold sometimes not reached until decades after the initial discovery.

Hyperion, a moon of Saturn — Hyperion, a porous, almost loufa-like moon of Saturn was imaged during a close flyby of NASA's Cassini spacecraft.
*NASA / ESA*

The following tables contain all the known moons of the solar system as of November 2025. The diameter of each satellite and the orbital distance from its planet’s center (semimajor axis) are in kilometers; eccentricity is the elongation of the satellite’s orbit; and inclination is the tilt of its orbit plane, in degrees, with respect to the planet’s equatorial plane (for inner moons and dwarf planets) or the ecliptic plane (for outer moons).

Moons of Earth and Mars

Planet/ Satellite	Diameter (km)	Visual magnitude	Distance (km)	Orbital period (days)	Eccen- tricity	Inclina- tion (°)
EARTH
Moon	3,474	–12.7	384,400	27.3	0.055	5.1
MARS
Phobos	22	11.4	9,380	0.3	0.015	1.1
Deimos	12	12.5	23,460	1.3	0.000	1.8

Moons of Jupiter

Satellite	Diameter (km)	Visual magnitude	Distance (km)	Orbital period (days)	Eccen- tricity	Inclina- tion (°)
Metis	44	17.5	128,000	0.3	0.0	0.0
Adrastea	16	18.7	129,000	0.3	0.0	0.0
Amalthea	168	14.1	181,400	0.5	0.003	0.4
Thebe	98	16.0	221,900	0.7	0.018	1.1
Io	3,643	5.0	421,800	1.8	0.004	0.0
Europa	3,122	5.3	671,100	3.5	0.009	0.5
Ganymede	5,262	4.6	1,070,400	7.2	0.001	0.2
Callisto	4,821	5.7	1,882,700	16.7	0.007	0.3
Themisto	9	21.0	7,397,000	130.0	0.257	44.3
Leda	18	20.2	11,145,200	240.3	0.162	28.2
Ersa	3	22.9	11,399,400	248.6	0.117	29
S/2018 J2	3	16.5	11,419,700	249.3	0.152	28.3
Himalia	160	14.8	11,439,000	249.9	0.16	28.4
Pandia	3	23.0	11,479,600	251.2	0.178	28.9
Lysithea	38	18.2	11,699,100	258.5	0.117	27.7
Elara	78	16.6	11,710,700	258.9	0.212	27.8
S/2011 J3	3	16.3	11,716,800	259.1	0.192	27.6
Dia	4	22.4	12,257,900	277.2	0.232	29.1
S/2018 J4	2	23.6	16,328,500	426.3	0.177	50.2
Carpo	3	23.0	17,039,500	454.4	0.415	53.3
Valetudo	1	24.0	18,690,100	522.1	0.217	34.5
Euporie	2	23.1	19,261,900	546.2	0.148	145.5
S/2003 J18	2	23.4	20,332,800	592.3	0.102	145.7
Eupheme	2	23.4	20,763,400	611.3	0.234	147.9
S/2021 J 3	2	23.6	20,776,600	611.9	0.239	147.9
S/2010 J2	1	23.9	20,786,900	612.4	0.244	148
S/2016 J1	1	24.0	20,796,700	612.8	0.245	145.1
Mneme	2	23.3	20,815,800	613.6	0.24	147.8
Euanthe	3	22.8	20,822,900	613.9	0.243	148.1
S/2003 J16	2	23.3	20,877,500	616.3	0.238	147.8
Harpalyke	4	22.2	20,887,500	616.8	0.239	147.8
Orthosie	2	23.1	20,897,800	617.2	0.294	144.2
Helike	4	22.6	20,911,400	617.9	0.155	154.4
S/2021 J 2	1	23.7	20,926,600	618.5	0.242	148.1
Praxidike	7	21.2	20,931,100	618.7	0.245	148.2
S/2017 J3	2	23.4	20,936,500	619	0.238	147.9
S/2021 J1	2	23.6	20,954,700	619.8	0.228	150.5
S/2003 J12	1	23.9	20,959,300	620	0.235	150
S/2017 J7	2	23.6	20,960,400	620	0.235	147.4
Thelxinoe	2	23.5	20,972,300	620.5	0.229	150.7
Thyone	4	22.3	20,972,700	620.6	0.235	147.6
S/2003 J2	2	23.2	20,992,900	621.5	0.225	150.1
S/2022 J3	1	24.1	21,015,100	622.4	0.248	148.1
Ananke	28	18.9	21,029,500	623.1	0.238	147.6
Iocaste	5	21.8	21,062,300	624.5	0.223	148.7
S/2017 J10	1	24.1	21,075,800	625.1	0.209	145.1
Hermippe	4	22.1	21,103,600	626.4	0.22	150.2
S/2017 J9	3	22.8	21,764,200	656	0.197	155.4
Philophrosyne	2	23.5	22,600,200	694.2	0.221	146.1
S/2016 J3	2	23.6	22,719,300	699.8	0.251	164.6
S/2022 J1	1	23.9	22,744,700	700.9	0.257	164.5
S/2017 J8	1	24	22,819,600	704.4	0.259	164.8
Pasithee	2	23.2	22,840,800	705.4	0.274	164.5
S/2021 J6	2	23.7	22,870,400	706.8	0.271	164.9
S/2003 J24	2	23.8	22,882,400	707.3	0.263	164.6
Eurydome	3	22.7	22,894,500	707.9	0.287	148.9
S/2011 J2	1	23.6	22,903,400	708.3	0.358	151.7
S/2003 J4	2	23.0	22,922,300	709.1	0.327	148.3
Chaldene	4	22.5	22,926,300	709.4	0.261	164.7
S/2017 J2	2	23.5	22,949,600	710.4	0.27	164.5
Isonoe	4	22.5	22,976,300	711.7	0.249	164.9
S/2017 J11	1	24.1	22,991,300	712.4	0.268	164.8
Kallichore	2	23.7	23,017,100	713.6	0.253	164.7
S/2021 J4	1	23.7	23,019,700	713.7	0.265	164.6
Erinome	3	22.8	23,027,200	714.1	0.272	164.3
Kale	2	23.0	23,047,800	715	0.262	164.6
Eirene	4	22.5	23,051,300	715.2	0.263	164.7
Aitne	3	22.7	23,059,400	715.5	0.273	164.5
Eukelade	4	22.6	23,062,400	715.7	0.274	164.7
S/2022 J2	1	24.2	23,073,400	716.2	0.263	164.7
Arche	3	22.8	23,093,200	717.1	0.263	164.5
Taygete	5	21.9	23,103,400	717.6	0.257	164.7
S/2016 J4	2	23.6	23,113,900	718	0.294	147.1
S/2011 J1	2	23.7	23,120,800	718.4	0.269	164.7
Carme	46	17.9	23,139,200	719.3	0.261	164.6
Herse	2	23.4	23,146,700	719.6	0.258	164.4
S/2003 J19	2	23.7	23,153,100	719.9	0.264	164.6
S/2010 J1	2	23.3	23,185,600	721.4	0.256	164.5
S/2003 J9	1	23.7	23,195,100	721.9	0.268	164.7
S/2017 J5	2	23.5	23,202,000	722.2	0.261	164.7
S/2017 J6	2	23.5	23,251,200	724.5	0.333	149.6
Kalyke	5	21.8	23,298,000	726.7	0.261	164.7
Hegemone	3	22.8	23,342,600	728.8	0.357	152.5
S/2003 J10	2	23.6	23,384,400	730.7	0.257	164.6
S/2018 J3	1	23.7	23,400,200	731.5	0.268	164.9
S/2021 J5	2	23.6	23,414,600	732.2	0.272	164.9
Pasiphae	58	16.9	23,463,200	734.4	0.412	148.3
Sponde	2	23.0	23,538,700	738	0.323	149.4
Megaclite	6	21.7	23,640,100	742.8	0.421	149.9
Cyllene	2	23.2	23,650,000	743.2	0.421	146.8
Sinope	38	18.3	23,679,300	744.6	0.262	157.3
S/2017 J1	2	23.8	23,739,600	747.4	0.321	145.6
Aoede	4	22.5	23,773,100	749.1	0.437	155.7
Autonoe	4	22.0	23,785,200	749.6	0.326	150.7
Callirrhoe	7	20.8	23,789,400	749.8	0.29	144.9
S/2003 J23	2	23.6	23,824,000	751.4	0.306	144.4
Kore	2	23.6	24,203,300	769.4	0.338	141.7

Moons of Saturn

Satellite	Diameter (km)	Visual magnitude	Distance (km)	Orbital period (days)	Eccen- tricity	Inclina- tion (°)
S/2009 S1	0.3	28.0	117,000	0.5	0.000	0.0
Pan	28	19.4	133,600	0.6	0	0
Daphnis	7	24.0	136,500	0.6	0	0
Atlas	32	18.5	137,700	0.6	0.001	0
Prometheus	86	15.8	139,400	0.6	0.002	0
Pandora	81	16.4	141,700	0.6	0.004	0
Epimetheus	113	15.6	151,400	0.7	0.02	0.3
Janus	178	14.4	151,500	0.7	0.007	0.2
Aegaeon	0.5	25.0	167,500	0.8	0	0
Mimas	397	12.8	186,000	0.9	0.02	1.6
Methone	3	23.0	194,700	1.0	0.002	0
Anthe	1	24.0	198,100	1.0	0.002	0
Pallene	4	23.0	212,300	1.2	0.004	0.2
Enceladus	499	11.8	238,400	1.4	0.005	0
Calypso	21	18.7	295,000	1.9	0.001	1.5
Telesto	25	18.5	295,000	1.9	0.001	1.2
Tethys	1,060	10.2	295,000	1.9	0.001	1.1
Helene	31	18.4	377,600	2.7	0.007	0.2
Polydeuces	4	23.0	377,600	2.7	0.019	0.2
Dione	1,118	10.4	377,700	2.7	0.002	0
Rhea	1,528	9.6	527,200	4.5	0.001	0.3
Titan	5,150	8.4	1,221,900	15.9	0.029	0.3
Hyperion	283	14.4	1,481,500	21.3	0.105	0.6
Iapetus	1,436	11.0	3,561,700	79.3	0.028	7.6
S/2023 S1	3	26.5	11,205,400	442.9	0.386	48.8
S/2019 S1	3	25.2	11,245,400	445.2	0.383	49.5
S/2004 S54	4	25.6	11,277,500	447.1	0.373	48.1
S/2004 S55	3	25.9	11,294,700	448.2	0.26	48.9
S/2020 S11	2	26.4	11,295,600	448.2	0.372	48.2
S/2019 S22	2	26.0	11,305,100	448.8	0.369	47.3
Kiviuq	14	22.0	11,307,400	448.9	0.275	48
S/2023 S2	2	26.6	11,309,900	449.1	0.339	45.7
S/2019 S23	2	26.0	11,310,200	449.1	0.255	48.7
S/2020 S12	2	26.3	11,314,500	449.3	0.26	50.8
S/2005 S4	4	25.0	11,324,500	449.9	0.315	48
S/2019 S25	3	25.6	11,329,400	450.2	0.271	48.1
S/2020 S1	2	26.0	11,338,600	450.8	0.337	48.2
Ijiraq	10	22.6	11,344,700	451.1	0.293	49.2
S/2019 S24	4	25.4	11,360,500	452.1	0.345	46.7
S/2007 S10	4	26.1	11,364,900	452.4	0.367	45.8
S/2019 S26	3	25.8	11,390,900	453.9	0.365	48.1
S/2020 S13	3	26.0	11,415,600	455.4	0.373	48
S/2023 S50	2	26.8	11,656,500	469.8	0.263	166.1
S/2023 S6	3	26.3	11,953,100	487.9	0.336	47.4
S/2023 S7	4	25.8	12,133,700	499.0	0.284	44.7
S/2023 S38	2	26.9	12,823,500	546.3	0.909	149.2
Phoebe	220	16.4	12,929,400	550.3	0.164	175.2
S/2023 S9	2	26.6	13,167,500	564.1	0.141	172.2
S/2006 S20	3	25.5	13,193,700	565.8	0.206	173.1
S/2004 S56	2	25.3	13,670,200	596.7	0.339	161.6
S/2023 S8	2	26.6	14,018,800	619.7	0.122	166.9
S/2023 S11	2	26.8	14,046,100	621.5	0.3	170.9
S/2006 S9	2	26.0	14,406,700	645.6	0.249	173
S/2006 S21	2	26.6	14,976,500	684.3	0.204	169.8
Paaliaq	19	21.3	14,997,700	685.7	0.378	48.5
S/2006 S22	3	26.5	15,109,500	693.4	0.246	172
S/2023 S13	3	26.5	15,193,000	699.2	0.179	168.5
S/2023 S10	2	26.6	15,500,200	720.5	0.302	163
Skathi	6	23.6	15,575,400	725.7	0.281	151.6
S/2023 S12	2	26.8	15,805,900	741.9	0.601	168.8
S/2007 S5	2	26.0	15,835,600	744.0	0.104	158.4
S/2007 S7	2	26.0	15,931,600	750.8	0.217	169.3
S/2007 S2	4	25.0	15,939,100	751.3	'0.232	174
S/2004 S37	4	25.1	15,956,300	752.5	0.448	158.2
S/2004 S47	2	26.0	16,050,700	759.2	0.291	160.9
S/2004 S40	2	26.0	16,075,600	761.0	0.297	169.2
S/2020 S14	2	26.2	16,186,200	768.9	'0.313	161.7
S/2019 S27	3	25.9	16,267,000	774.6	0.42	162.1
Albiorix	26	20.5	16,329,200	779.1	0.482	36.8
S/2019 S2	2	26.0	16,560,300	795.7	0.279	173.3
S/2020 S15	2	26.2	16,729,200	807.8	0.462	37.1
S/2023 S14	2	26.7	16,853,000	816.9	0.497	171.6
S/2020 S16	3	26	16,963,400	824.9	0.405	167.3
S/2023 S16	2	26.7	17,005,300	827.9	0.27	162.6
Bebhionn	6	24.1	17,027,300	829.6	0.459	38.6
S/2007 S8	2	25.8	17,048,900	831.2	0.49	36.2
S/2004 S29	4	24.9	17,063,900	832.3	0.485	38.6
S/2019 S3	2	26.0	17,077,400	833.2	0.248	166.9
S/2020 S17	3	25.8	17,094,200	834.4	0.378	148.9
S/2023 S/20	2	26.6	17,261,000	846.8	0.442	136.5
S/2019 S29	3	25.8	17,353,900	853.6	0.441	37.7
S/2023 S18	2	26.7	17,381,700	855.7	0.448	36.7
S/2023 S17	2	27.0	17,385,300	855.9	0.498	35.9
S/2020 S7	2	26.5	17,394,000	856.5	0.5	161.4
S/2007 S11	3	26.3	17,434,400	859.5	0.499	35.5
S/2019 S28	3	25.6	17,496,000	864.1	0.199	158.4
S/2004 S31	4	24.9	17,497,100	863.9	0.159	48
Erriapus	9	23.0	17,506,900	864.9	0.475	37.1
S/2023 S19	2	27.0	17,590,300	870.9	0.092	48.2
Skoll	6	24.5	17,623,400	873.6	0.463	159.4
S/2023 S3	3	26.4	17,646,400	875.0	0.178	46.9
S/2019 S30	2	26.1	17,709,900	880.0	0.107	168.3
S/2020 S19	2	26.3	17,726,700	881.0	0.159	48.1
S/2019 S31	3	25.8	17,739,100	882.2	0.488	39.8
Tarqeq	7	23.9	17,751,000	882.9	0.144	48.7
S/2023 S21	3	26.4	17,755,400	883.3	0.077	157.3
S/2023 S4	3	26.3	17,764,600	884.1	0.276	170
S/2020 S18	3	26.1	17,777,900	885.1	0.18	168.9
S/2019 S14	2	26.0	17,852,800	890.6	0.172	46.2
S/2020 S2	2	26.0	17,869,000	891.9	0.152	170.7
Siarnaq	32	20.1	17,881,100	892.7	0.308	47.8
S/2019 S4	2	26.0	17,951,900	898.1	0.408	170.1
S/2019 S32	4	25	17,960,500	898.7	0.276	46.2
S/2020 S/20	3	26.1	17,997,300	901.5	0.133	169.8
S/2020 S3	2	26.0	18,056,800	905.8	0.142	46
S/2004 S41	2	26.0	18,095,400	908.9	0.301	165.7
S/2005 S6	3	26.0	18,107,300	909.6	0.084	47.7
S/2004 S57	3	25.7	18,150,500	913.1	0.263	167.9
S/2019 S6	2	25.8	18,205,600	917.1	0.12	46.4
S/2006 S24	2	26.7	18,210,700	917.6	0.352	165.9
Tarvos	13	22.1	18,216,600	918.0	0.522	37.8
S/2020 S4	2	27.0	18,236,400	919.5	0.496	40.1
S/2023 S30	2	26.6	18,238,300	919.7	0.493	142.4
S/2004 S42	2	26.0	18,240,700	919.9	0.158	165.7
S/2023 S15	2	26.7	18,241,300	919.9	0.549	161.9
S/2004 S58	4	25.3	18,254,500	920.8	0.249	45.7
S/2006 S23	3	26.3	18,269,700	921.9	0.19	43.8
Hyrrokkin	8	23.5	18,340,900	927.5	0.336	149.9
S/2023 S24	2	26.6	18,351,800	928.2	0.374	169.7
Greip	4	25.1	18,380,000	930.4	0.317	174.2
S/2020 S5	2	26.0	18,391,000	931.2	0.22	48.2
S/2019 S34	2	26.0	18,446,800	935.4	0.536	37.6
S/2004 S13	6	24.5	18,453,700	936.1	0.265	169
S/2005 S7	3	26.1	18,502,500	939.7	0.565	34.6
S/2007 S6	2	26.0	18,545,000	943.0	0.168	166.5
S/2019 S35	2	26.0	18,557,800	944.0	0.577	157.3
S/2006 S25	3	26.3	18,572,400	945.1	0.303	158.8
S/2023 S22	3	26.1	18,577,500	945.4	0.182	47.5
Mundilfari	6	23.8	18,588,200	946.3	0.211	167.1
S/2006 S26	3	26.4	18,619,300	948.7	0.248	171.9
S/2019 S33	3	25.6	18,696,100	954.5	0.289	170.4
S/2006 S1	2	26	18,746,300	958.3	0.105	156.1
S/2023 S23	3	26.3	18,783,700	961.2	0.35	164.8
S/2020 S21	2	26.2	18,862,100	967.3	0.307	169.9
S/2004 S43	2	26.0	18,935,700	972.9	0.432	171.1
S/2006 S10	2	26.0	18,979,900	976.3	0.151	161.6
S/2019 S5	2	26.0	19,090,100	984.9	0.216	158.8
S/2023 S25	2	26.0	19,136,600	988.5	0.281	166.4
S/2004 S59	3	25.9	19,170,700	991.2	0.262	167.3
S/2006 S27	3	26.2	19,205,700	993.8	0.14	170.5
Gridr	6	24.4	19,250,600	997.3	0.187	163.9
Bergelmir	6	24.2	19,268,100	998.6	0.145	158.8
Jarnsaxa	6	24.7	19,273,500	999.1	0.218	163
Narvi	8	24.0	19,285,000	999.9	0.441	142.2
S/2023 S44	3	26.5	19,292,400	1,000.5	0.434	167.4
Suttungr	6	23.9	19,391,900	1,008.2	0.116	175.7
S/2020 S22	3	26.1	19,443,000	1,012.2	0.059	161.3
S/2004 S44	3	25.4	19,515,400	1,017.9	0.129	167.7
S/2004 S60	3	26.0	19,517,000	1,018.1	0.28	173.8
S/2006 S12	2	26.0	19,570,300	1,022.3	0.542	38.6
S/2007 S3	5	24.9	19,614,400	1,025.7	'0.15	173.8
S/2004 S45	3	25.5	19,693,700	1,031.9	0.551	154
Hati	6	24.4	19,695,000	1,032.0	0.372	165.4
S/2004 S17	3	25.4	19,699,000	1,032.4	0.162	167.9
S/2006 S11	2	26.0	19,711,900	1,033.4	0.143	174.1
S/2004 S12	7	23.9	19,801,000	1,040.4	0.337	164.7
S/2020 S23	3	26.1	19,801,500	1,040.4	0.089	165
S/2023 S27	3	26.4	19,820,100	1,041.9	0.652	151.1
Eggther	4	24.5	19,844,600	1,043.8	0.157	165
S/2023 S28	2	26.8	19,881,000	1,046.6	0.575	168.7
S/2023 S37	2	26.8	19,889,800	1,047.4	0.215	172.3
S/2023 S26	2	26.8	19,894,300	1,047.8	0.306	163.9
S/2019 S36	2	26.1	19,903,200	1,048.4	0.161	166.9
S/2006 S13	2	25.8	19,953,300	1,052.3	0.313	162
S/2019 S37	2	26.0	19,996,900	1,055.8	0.404	149.9
S/2023 S48	3	26.5	20,029,200	1,058.3	0.022	169.7
S/2023 S29	2	26.6	20,042,400	1,059.4	0.141	172.2
S/2007 S9	2	26.5	20,174,600	1,069.8	0.36	159.3
S/2019 S7	2	26.0	20,185,100	1,070.8	0.233	174.2
S/2019 S8	2	26.0	20,287,400	1,078.9	0.311	172.8
Farbauti	5	24.7	20,290,700	1,079.1	0.249	156.2
Thrymr	6	23.9	20,330,500	1,082.2	0.467	175
Bestla	7	23.8	20,337,800	1,082.9	0.486	138.3
S/2019 S9	2	26.0	20,359,700	1,084.6	0.433	159.5
S/2023 S32	2	27.1	20,454,400	1,092.2	0.037	169.8
S/2004 S46	2	26.0	20,513,800	1,097.0	0.249	177.2
Angrboda	3	25.3	20,591,500	1,103.2	0.216	177.7
S/2020 S24	2	26.3	20,618,300	1,105.4	0.23	159.6
S/2019 S11	2	26.0	20,664,200	1,109.1	0.513	144.6
Aegir	6	24.4	20,664,400	1,109.1	0.255	166.1
S/2019 S10	2	26.0	20,700,300	1,112.0	0.248	163.9
Beli	3	25.4	20,703,700	1,112.3	0.087	158.9
S/2023 S31	2	26.9	20,729,200	1,114.3	0.182	163
S/2020 S25	2	27	20,763,700	1,117.1	0.316	171.8
S/2023 S34	3	26.5	20,803,900	1,120.4	0.57	168.4
S/2023 S39	2	26.7	20,824,500	1,122.0	0.124	164.8
S/2019 S12	2	26.0	20,895,000	1,127.6	0.476	167.1
Gerd	3	25.2	20,947,500	1,131.9	0.517	174.4
S/2019 S13	2	26.0	20,964,500	1,133.3	0.318	177.3
S/2004 S61	3	25.8	20,986,900	1,135.1	0.466	168.4
S/2006 S14	2	26.0	21,062,300	1,141.3	0.06	166.7
S/2023 S40	2	26.8	21,065,100	1,141.5	0.342	169.6
Gunnlod	4	25.0	21,141,800	1,147.7	0.251	160.4
S/2019 S15	2	26.5	21,191,100	1,151.7	0.257	157.8
S/2020 S6	2	26.0	21,253,300	1,156.8	0.48	166.9
S/2020 S26	3	26.1	21,264,400	1,157.8	0.273	163.2
S/2023 S41	2	26.6	21,286,400	1,159.5	0.279	172.1
S/2004 S7	6	24.5	21,327,600	1,162.9	0.511	164.8
S/2006 S3	5	24.6	21,353,100	1,165.0	0.432	156.1
S/2005 S5	2	25.8	21,364,900	1,166.0	0.588	169.5
Skrymir	4	24.8	21,447,400	1,172.7	0.437	175.6
S/2023 S33	2	26.7	21,621,900	1,187.1	0.665	155.8
S/2006 S16	2	26.0	21,721,200	1,195.1	0.204	164.1
S/2023 S49	2	26.6	21,766,500	1,199.0	0.026	171.7
S/2020 S30	2	26.2	21,790,700	1,201.0	0.601	154.2
S/2006 S15	2	25.7	21,799,600	1,201.7	0.117	161.1
S/2020 S27	3	25.9	21,802,300	1,202.0	0.255	145.3
S/2023 S42	2	26.6	21,837,000	1,204.8	0.059	166.7
S/2004 S28	4	24.9	21,865,900	1,207.2	0.159	167.9
S/2020 S32	2	26.2	21,884,100	1,208.8	0.502	169.1
S/2006 S28	3	26.2	21,955,100	1,214.5	0.21	172.9
S/2020 S8	2	26.0	21,967,200	1,215.6	0.252	161.8
S/2020 S28	2	26.2	21,993,700	1,217.8	0.474	160.1
Alvaldi	4	24.6	21,993,800	1,217.8	0.238	177.4
S/2019 S38	2	26.0	21,998,400	1,218.3	0.399	163
Kari	7	23.9	22,032,100	1,221.0	0.469	153
S/2004 S48	3	25.5	22,137,400	1,229.9	0.374	161.9
S/2023 S36	2	26.7	22,230,600	1,237.6	0.359	166.3
Geirrod	4	25.1	22,259,400	1,240.0	0.539	154.4
S/2023 S35	2	26.7	22,269,700	1,240.8	0.151	168.5
S/2020 S29	2	26.3	22,301,400	1,243.4	0.047	169.1
Fenrir	4	25.0	22,330,800	1,245.9	0.137	164.5
S/2004 S50	2	25.8	22,345,000	1,247.2	0.45	164
S/2006 S17	3	25.5	22,384,200	1,250.5	0.425	168.7
S/2004 S49	2	25.7	22,399,400	1,251.7	0.453	159.8
S/2020 S34	3	26.0	22,435,600	1,254.6	0.154	160.6
S/2020 S31	3	26.0	22,457,300	1,256.5	0.238	163.8
S/2023 S43	3	26.3	22,563,900	1,265.6	0.264	170.3
S/2019 S17	3	25.6	22,722,700	1,279.0	0.546	155.5
Surtur	6	24.8	22,748,000	1,281.1	0.448	168.4
S/2006 S18	3	25.5	22,760,600	1,282.1	0.131	169.5
S/2020 S36	3	26.1	22,806,200	1,286.0	0.336	168.8
Loge	6	24.6	22,919,200	1,295.5	0.191	168.1
S/2020 S33	2	26.4	22,922,500	1,295.9	0.555	162.8
Ymir	16	21.7	22,955,600	1,298.7	0.338	172.3
S/2020 S35	2	26.2	23,030,300	1,305.0	0.225	174.9
S/2019 S19	2	26.0	23,044,400	1,306.2	0.458	151.8
S/2019 S18	2	26.0	23,139,500	1,314.3	0.509	154.6
S/2004 S21	2	26.0	23,160,900	1,316.1	0.394	153.2
S/2004 S39	2	25.5	23,192,400	1,318.7	0.1	165.9
S/2019 S16	2	26.0	23,265,200	1,324.9	0.25	162
S/2004 S53	2	25.8	23,279,800	1,326.2	0.24	162.6
S/2004 S24	3	25.2	23,338,200	1,331.3	0.071	37.4
S/2004 S36	3	25.3	23,390,800	1,335.8	0.625	153.3
S/2023 S45	2	26.8	23,438,400	1,339.8	0.633	157.4
Thiazzi	4	25.0	23,577,500	1,351.8	0.511	158.8
S/2020 S38	4	25.6	23,583,900	1,352.4	0.513	159.7
S/2019 S20	2	26.5	23,677,900	1,360.5	0.354	156
S/2020 S37	3	26.1	23,751,800	1,366.8	0.344	174.8
S/2019 S39	2	26	23,784,500	1,369.6	0.098	174.5
S/2020 S40	3	26	23,785,900	1,369.8	0.412	167.3
S/2006 S19	2	25.5	23,800,500	1,371.0	0.467	175.5
S/2019 S40	3	25.9	24,087,800	1,395.9	0.088	161.8
S/2019 S42	4	25.2	24,111,600	1,398.0	0.121	163.2
S/2004 S34	3	25.3	24,145,800	1,400.9	0.279	168.3
S/2020 S39	2	26.2	24,262,400	1,411.1	0.305	160.1
S/2019 S41	2	26.2	24,493,600	1,431.3	0.257	157.1
S/2023 S46	2	26.7	24,708,900	1,450.3	0.336	143.2
Fornjot	6	24.6	24,936,800	1,470.4	0.213	170
S/2023 S47	2	26.9	25,102,300	1,485.0	0.101	162.5
S/2004 S51	3	25.5	25,207,100	1,494.4	0.201	171.2
S/2006 S29	3	26.3	25,212,100	1,494.8	0.239	156.2
S/2020 S10	2	26.5	25,315,300	1,504.0	0.296	165.6
S/2020 S42	2	26.2	25,329,400	1,505.3	0.506	157.5
S/2020 S9	2	26.0	25,408,700	1,512.4	0.531	161.4
S/2023 S5	2	26.6	25,583,500	1,528.0	0.599	168.8
S/2020 S41	3	26.1	25,876,400	1,554.4	0.402	160.2
S/2004 S26	4	25.0	26,097,500	1,574.3	0.147	172.9
S/2019 S21	2	26.0	26,439,500	1,605.3	0.155	171.9
S/2004 S52	2	26.0	26,446,400	1,605.9	0.291	165.4
S/2020 S43	2	26.4	26,657,400	1,625.3	0.203	164.6
S/2019 S43	3	25.8	26,664,100	1,625.9	0.277	165.3
S/2019 S44	3	25.7	26,796,900	1,638.1	0.512	172.6
S/2020 S44	2	26.3	27,259,400	1,680.6	0.199	168.5

Moons of Uranus

Satellite	Diameter (km)	Visual magnitude	Distance (km)	Orbital period (days)	Eccen- tricity	Inclina- tion (°)
Cordelia	40	23.6	49,800	0.3	0.085	0.2
Ophelia	23	23.3	53,800	0.4	0.011	0.1
S/2025 U1	10	25.5	57,800	0.4	0.039	0.0
Bianca	51	22.5	59,200	0.4	0.006	0.2
Cressida	80	21.6	61,800	0.5	0.004	0.1
Desdemona	64	22.0	62,700	0.5	0.007	0.1
Juliet	94	21.1	64,400	0.5	0.006	0.0
Portia	135	20.4	66,100	0.5	0.004	0.0
Rosalind	72	21.8	69,900	0.6	0.003	0.0
Cupid	10	26.0	74,400	0.6	0.007	0.1
Belinda	81	21.5	75,300	0.6	0.002	0.0
Perdita	40	23.6	76,400	0.6	0.005	0
Puck	162	19.8	86,000	0.8	0.000	0.3
Mab	10	26.0	97,700	0.9	0.006	0.1
Miranda	472	15.8	129,800	1.4	0.001	4.4
Ariel	1,158	13.7	190,900	2.5	0.001	0.0
Umbriel	1,169	14.5	266,000	4.1	0.004	0.1
Titania	1,578	13.5	436,300	8.7	0.002	0.1
Oberon	1,523	13.7	583,400	13.5	0.002	0.1
Francisco	12	25.0	4,275,700	266.6	0.144	146.8
Caliban	89	22.4	7,167,000	579.7	0.200	141.4
Stephano	20	24.1	7,951,400	677.4	0.235	143.6
S/2023 U1	5	26.6	7,976,600	679.4	0.250	143.9
Trinculo	10	25.4	8,502,600	749.6	0.220	167.1
Sycorax	190	20.8	12,193,000	1,286	0.520	157.0
Margaret	11	25.2	14,425,000	1,655	0.642	60.5
Prospero	30	20.8	16,221,000	1,974	0.441	149.4
Setebos	30	23.3	17,519,800	2,215	0.579	153.9
Ferdinand	12	25.1	20,421,200	2,788	0.395	169.2

Moons of Neptune

Satellite	Diameter (km)	Visual magnitude	Distance (km)	Orbital period (days)	Eccen- tricity	Inclina- tion (°)
Naiad	76	24.6	48,200	0.3	0.000	4.7
Thalassa	92	23.9	50,100	0.3	0.000	0.2
Despina	146	22.5	52,500	0.3	0.000	0.0
Galatea	179	22.4	62,000	0.4	0.000	0.0
Larissa	179	22.0	73,500	0.6	0.001	0.2
Hippocamp	35	26.5	105,300	1.0	0.001	0.3
Proteus	407	20.3	117,600	1.1	0.000	0.0
Triton	2,707	13.5	354,800	5.9	0.000	157.3
Nereid	340	19.7	5,504,000	360.1	0.749	5.8
Halimede	54	24.2	15,753,700	1,879.5	0.566	133.8
Sao	31	25.4	22,381,400	2,914.3	0.299	48.2
S/2002 N5	15	25.9	23,365,200	3,141.3	0.548	42.1
Laomedeia	37	25.0	23,607,900	3,179.6	0.418	34.8
Psamathe	36	25.1	46,701,600	9,110.4	0.451	137.1
Neso	43	24.7	50,045,900	9,617.8	0.447	132.3
S/2021 N1	10	26.9	50,623,600	10,017.9	0.548	134.5

Moons of Pluto

Satellite	Diameter (km)	Visual magnitude	Distance (km)	Orbital period (days)	Eccen- tricity	Inclina- tion (°)
Charon	1,186	17.3	19,600	6.4	0.000	0.0
Styx	12	27.0	42,400	20.2	0	0.0
Nix	45	23.4	48,700	24.9	0.000	0.0
Kerberos	14	26.0	57,800	31.9	0.000	0.4
Hydra	45	23.0	64,700	38.5	0.006	0.3

Moons of Other Dwarf Planets

Object/ Satellite	Diameter (km)	Visual magnitude	Distance (km)	Orbital period (days)	Eccen- tricity	Inclina- tion (°)
HAUMEA
Namaka	170	21.9	25,700	18.3	0.249	113.0
Hiʻiaka	310	20.6	49,900	49.5	0.051	126.4
QUAOAR
Weywot	75	24.9	14,500	12.4	0.15	14
MAKEMAKE
S/2015 (136472) 1	175	25.2	>21,000	>12	?	?
GONGGONG
Xiangliu	250	26.0	24,000	35–100	0.3	83 or 119
ERIS
Dysnomia	350	25.6	37,350	15.8	0.007	142