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.

NASA / JPL / Space Science Institute
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.

NASA / ESA
The following tables contain all the known moons of the solar system, including the dozens of moons circling Jupiter, Saturn, Uranus, and Neptune. As of May 2023, the count stood at 295, distributed as follows: Earth 1, Mars 2, Jupiter 95, Saturn 146, Uranus 27, Neptune 14 — and among the IAU-approved dwarf planets: Pluto 5, Haumea 2, Makemake 1, Gonggong 1, Eris 1.
In the table below, 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). Names of “lost” objects are shown in italics.
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 | 0.000 | 0.0 |
Adrastea | 16 | 18.7 | 129,000 | 0.3 | 0.000 | 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 | 7,398,500 | 130.0 | 0.340 | 43.8 |
Leda | 18 | 20.2 | 11,146,400 | 241.0 | 0.162 | 28.6 |
Ersa | 3 | 22.9 | 11,401,000 | 249.2 | 0.116 | 29.1 |
Himalia | 160 | 14.8 | 11,440,600 | 250.6 | 0.160 | 28.1 |
S/2018 J2 | 3 | 16.5 | 11,467,500 | 250.9 | 0.118 | 29.4 |
Pandia | 3 | 23.0 | 11,481,000 | 251.9 | 0.179 | 29.0 |
Lysithea | 38 | 18.2 | 11,700,800 | 259.2 | 0.117 | 27.2 |
Elara | 78 | 16.6 | 11,712,300 | 259.6 | 0.211 | 27.9 |
S/2011 J3 | 3 | 16.3 | 11,797,200 | 261.8 | 0.176 | 28.7 |
Dia | 4 | 22.4 | 12,260,300 | 287.2 | 0.232 | 29.0 |
S/2018 J4 | 2 | 23.6 | 16,504,300 | 433.2 | 0.057 | 53.2 |
Carpo | 3 | 23.0 | 17,042,300 | 456.3 | 0.416 | 53.2 |
Valetudo | 1 | 24.0 | 18,694,200 | 527.6 | 0.217 | 34.5 |
Euporie | 2 | 23.1 | 19,265,800 | 550.7 | 0.148 | 145.7 |
S/2003 J18 | 2 | 23.4 | 20,336,300 | 598.1 | 0.090 | 145.3 |
S/2021 J1 | 2 | 23.6 | 20,667,200 | 607.0 | 0.246 | 149.8 |
Eupheme | 2 | 23.4 | 20,768,600 | 616.7 | 0.241 | 148.0 |
S/2010 J2 | 1 | 23.9 | 20,793,000 | 618.8 | 0.248 | 148.1 |
S/2016 J1 | 1 | 24.0 | 20,802,600 | 618.5 | 0.232 | 144.7 |
Mneme | 2 | 23.3 | 20,821,000 | 620.1 | 0.247 | 148.0 |
Euanthe | 3 | 22.8 | 20,827,000 | 620.4 | 0.239 | 148.0 |
S/2003 J16 | 2 | 23.3 | 20,882,600 | 622.9 | 0.243 | 148.0 |
Harpalyke | 4 | 22.2 | 20,892,100 | 623.3 | 0.232 | 147.7 |
Orthosie | 2 | 23.1 | 20,901,000 | 622.6 | 0.299 | 144.3 |
S/2022 J3 | 1 | 24.1 | 20,912,400 | 617.8 | 0.272 | 144.5 |
Helike | 4 | 22.6 | 20,915,700 | 626.3 | 0.153 | 154.4 |
Praxidike | 7 | 21.2 | 20,935,400 | 625.4 | 0.246 | 148.3 |
S/2017 J3 | 2 | 23.4 | 20,941,000 | 625.6 | 0.231 | 147.9 |
S/2003 J12 | 1 | 23.9 | 20,963,100 | 627.2 | 0.235 | 150.0 |
S/2017 J7 | 2 | 23.6 | 20,964,800 | 626.6 | 0.233 | 147.3 |
Thelxinoe | 2 | 23.5 | 20,976,000 | 628.0 | 0.228 | 150.6 |
Thyone | 4 | 22.3 | 20,978,000 | 627.2 | 0.233 | 147.5 |
S/2003 J2 | 2 | 23.2 | 20,997,700 | 628.8 | 0.225 | 150.2 |
Ananke | 28 | 18.9 | 21,034,500 | 629.8 | 0.237 | 147.6 |
Iocaste | 5 | 21.8 | 21,066,700 | 631.6 | 0.227 | 148.8 |
Hermippe | 4 | 22.1 | 21,108,500 | 633.9 | 0.219 | 150.2 |
S/2021 J 2 | 1 | 23.7 | 21,140,600 | 628.0 | 0.341 | 150.1 |
S/2021 J 3 | 2 | 23.6 | 21,495,700 | 643.8 | 0.356 | 150.1 |
S/2017 J9 | 3 | 22.8 | 21,768,700 | 666.1 | 0.200 | 155.5 |
S/2022 J1 | 2 | 23.1 | 22,015,500 | 667.3 | 0.191 | 165.4 |
S/2016 J3 | 2 | 23.6 | 22,213,500 | 676.4 | 0.236 | 164.1 |
S/2022 J2 | 1 | 24.1 | 22,413,200 | 685.5 | 0.182 | 165.4 |
Philophrosyne | 2 | 23.5 | 22,604,600 | 702.5 | 0.229 | 146.3 |
S/2018 J3 | 1 | 23.7 | 22,826,600 | 704.6 | 0.273 | 164.9 |
S/2021 J5 | 2 | 23.6 | 22,831,800 | 704.8 | 0.200 | 163.2 |
Pasithee | 2 | 23.2 | 22,846,700 | 719.5 | 0.270 | 164.6 |
S/2017 J8 | 1 | 24 | 22,849,500 | 719.8 | 0.255 | 164.8 |
S/2003 J24 | 2 | 23.8 | 22,887,400 | 721.6 | 0.259 | 164.5 |
Eurydome | 3 | 22.7 | 22,899,000 | 717.3 | 0.294 | 149.1 |
S/2011 J2 | 1 | 23.6 | 22,909,200 | 718.3 | 0.355 | 151.9 |
S/2003 J4 | 2 | 23.0 | 22,926,500 | 718.1 | 0.328 | 148.2 |
Chaldene | 4 | 22.5 | 22,930,500 | 723.7 | 0.265 | 164.7 |
S/2021 J4 | 1 | 23.7 | 22,946,700 | 710.1 | 0.159 | 149.6 |
S/2017 J2 | 2 | 23.5 | 22,953,200 | 724.7 | 0.272 | 164.5 |
Isonoe | 4 | 22.5 | 22,981,300 | 726.3 | 0.249 | 164.8 |
Kallichore | 2 | 23.7 | 23,021,800 | 728.3 | 0.252 | 164.8 |
Erinome | 3 | 22.8 | 23,032,900 | 728.5 | 0.276 | 164.4 |
Kale | 2 | 23.0 | 23,052,600 | 729.6 | 0.262 | 164.6 |
Eirene | 4 | 22.5 | 23,055,800 | 729.8 | 0.258 | 164.6 |
Aitne | 3 | 22.7 | 23,064,400 | 730.1 | 0.277 | 164.6 |
Eukelade | 4 | 22.6 | 23,067,400 | 730.3 | 0.277 | 164.6 |
Arche | 3 | 22.8 | 23,097,800 | 731.9 | 0.261 | 164.6 |
Taygete | 5 | 21.9 | 23,108,000 | 732.4 | 0.253 | 164.7 |
S/2016 J4 | 2 | 23.6 | 23,113,800 | 727.0 | 0.294 | 147.1 |
S/2011 J1 | 2 | 23.7 | 23,124,500 | 733.2 | 0.271 | 164.6 |
Carme | 46 | 17.9 | 23,144.400 | 734.2 | 0.256 | 164.6 |
Herse | 2 | 23.4 | 23,150,500 | 734.5 | 0.262 | 164.4 |
S/2003 J19 | 2 | 23.7 | 23,156,400 | 734.8 | 0.265 | 164.7 |
S/2010 J1 | 2 | 23.3 | 23,189,800 | 736.5 | 0.252 | 164.5 |
S/2003 J9 | 1 | 23.7 | 23,199,400 | 736.9 | 0.263 | 164.8 |
S/2017 J5 | 2 | 23.5 | 23,206,200 | 737.3 | 0.257 | 164.8 |
S/2017 J6 | 2 | 23.5 | 23,245,300 | 734.0 | 0.336 | 149.7 |
Kalyke | 5 | 21.8 | 23,302,600 | 742.0 | 0.260 | 164.8 |
Hegemone | 3 | 22.8 | 23,348,700 | 739.8 | 0.358 | 152.6 |
S/2021 J6 | 2 | 23.7 | 23,427,200 | 732.6 | 0.363 | 166.5 |
Pasiphae | 58 | 16.9 | 23,468,200 | 743.6 | 0.412 | 148.4 |
Sponde | 2 | 23.0 | 23,543.300 | 748.3 | 0.322 | 149.3 |
S/2003 J10 | 2 | 23.6 | 23,576.300 | 755.4 | 0.264 | 164.4 |
Megaclite | 6 | 21.7 | 23,644,600 | 752.9 | 0.421 | 149.8 |
Cyllene | 2 | 23.2 | 23,654,700 | 752.0 | 0.419 | 146.8 |
Sinope | 38 | 18.3 | 23,683,900 | 758.9 | 0.264 | 157.3 |
S/2017 J1 | 2 | 23.8 | 23,744,800 | 756.4 | 0.328 | 145.8 |
Aoede | 4 | 22.5 | 23,778,200 | 761.5 | 0.436 | 155.7 |
Autonoe | 4 | 22.0 | 23,792,500 | 761.0 | 0.330 | 150.8 |
Callirrhoe | 7 | 20.8 | 23,795,500 | 758.9 | 0.297 | 145.1 |
S/2003 J23 | 2 | 23.6 | 23,829,300 | 760.0 | 0.313 | 144.7 |
Kore | 2 | 23.6 | 24,205,200 | 776.8 | 0.328 | 141.5 |
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 | 0.000 | 0.0 |
Daphnis | 7 | 24.0 | 136,500 | 0.6 | 0.000 | 0.0 |
Atlas | 32 | 18.5 | 137,700 | 0.6 | 0.001 | 0.0 |
Prometheus | 86 | 15.8 | 139,400 | 0.6 | 0.002 | 0.0 |
Pandora | 81 | 16.4 | 141,700 | 0.6 | 0.004 | 0.1 |
Epimetheus | 113 | 15.6 | 151,400 | 0.7 | 0.020 | 0.3 |
Janus | 178 | 14.4 | 151,500 | 0.7 | 0.007 | 0.2 |
Aegaeon | 0.5 | 25.0 | 167,500 | 0.8 | 0.000 | 0.0 |
Mimas | 397 | 12.8 | 185,600 | 0.9 | 0.020 | 1.6 |
Methone | 3 | 23.0 | 194,700 | 1.0 | 0.000 | 0.0 |
Anthe | 1 | 24.0 | 198,100 | 1.0 | 0.002 | 0.0 |
Pallene | 4 | 23.0 | 212,300 | 1.2 | 0.004 | 0.2 |
Enceladus | 499 | 11.8 | 238,400 | 1.4 | 0.005 | 0.0 |
Tethys | 1,060 | 10.2 | 295,000 | 1.9 | 0.001 | 1.1 |
Telesto | 25 | 18.5 | 295,000 | 1.9 | 0.001 | 1.2 |
Calypso | 21 | 18.7 | 295,000 | 1.9 | 0.001 | 1.5 |
Polydeuces | 4 | 23.0 | 377,600 | 2.7 | 0.019 | 0.2 |
Helene | 31 | 18.4 | 377,600 | 2.7 | 0.007 | 0.2 |
Dione | 1,118 | 10.4 | 377,700 | 2.7 | 0.002 | 0.0 |
Rhea | 1,528 | 9.6 | 527,200 | 4.5 | 0.001 | 0.3 |
Titan | 5,150 | 8.4 | 1,221,900 | 16.0 | 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/2019 S1 | 6 | 25.1 | 11,244,000 | 445.6 | 0.541 | 46.7 |
S/2005 S4 | 2 | 25.5 | 11,302,600 | 448.6 | 0.177 | 52.5 |
Kiviuq | 14 | 22.0 | 11,307,300 | 449.1 | 0.182 | 48.9 |
S/2020 S1 | 2 | 25.6 | 11,339,600 | 450.8 | 0.462 | 47.0 |
Ijiraq | 10 | 22.6 | 11,344,600 | 451.5 | 0.353 | 49.2 |
Phoebe | 220 | 16.4 | 12,929,400 | 550.3 | 0.164 | 175.2 |
S/2006 S20 | 2 | 25.8 | 13,163,900 | 563.9 | 0.193 | 174.8 |
S/2006 S9 | 1 | 26.1 | 14,453,000 | 648.7 | 0.268 | 174.1 |
Paaliaq | 19 | 21.3 | 14,997,300 | 687.0 | 0.384 | 47.1 |
Skathi | 6 | 23.6 | 15,575,100 | 728.1 | 0.265 | 149.7 |
S/2007 S7 | 1 | 26.1 | 15,818,700 | 742.8 | 0.232 | 169.3 |
S/2007 S5 | 2 | 25.8 | 15,899,500 | 748.5 | 0.116 | 160.3 |
S/2007 S2 | 6 | 24.4 | 15,939,700 | 754.9 | 0.232 | 175.6 |
S/2004 S37 | 4 | 25.1 | 15,940,500 | 754.5 | 0.446 | 159.3 |
S/2004 S47 | 1 | 26.1 | 16,001,200 | 755.7 | 0.268 | 159.7 |
S/2004 S40 | 1 | 26.1 | 16,145,300 | 765.9 | 0.317 | 169.8 |
Albiorix | 26 | 20.5 | 16,329,100 | 783.5 | 0.470 | 38.9 |
S/2019 S2 | 1 | 26.3 | 16,568,400 | 796.2 | 0.265 | 176.1 |
S/2007 S8 | 2 | 25.7 | 16,991,800 | 826.9 | 0.535 | 32.8 |
Bebhionn | 6 | 24.1 | 17,028,900 | 834.9 | 0.482 | 37.4 |
S/2004 S29 | 4 | 24.9 | 17,063,900 | 837.8 | 0.485 | 38.6 |
S/2019 S3 | 2 | 25.9 | 17,125,000 | 836.7 | 0.245 | 164.2 |
S/2020 S7 | 1 | 26.6 | 17,236,300 | 844.8 | 0.558 | 160.8 |
S/2004 S31 | 4 | 24.9 | 17,495,400 | 866.2 | 0.202 | 48.3 |
Erriapus | 9 | 23.0 | 17,507,200 | 871.1 | 0.462 | 38.7 |
Skoll | 6 | 24.5 | 17,625,700 | 878.4 | 0.470 | 158.4 |
Tarqeq | 7 | 23.9 | 17,748,200 | 885.0 | 0.119 | 49.7 |
Siarnaq | 32 | 20.1 | 17,880,800 | 895.9 | 0.311 | 48.2 |
S/2004 S41 | 2 | 25.9 | 17,921,900 | 895.8 | 0.295 | 168.3 |
S/2020 S3 | 1 | 26.2 | 17,929,800 | 896.4 | 0.038 | 47.1 |
S/2019 S4 | 1 | 26.2 | 17,957,200 | 898.4 | 0.45 | 169.5 |
S/2019 S14 | 1 | 26.3 | 18,005,000 | 902.0 | 0.072 | 50.1 |
S/2020 S2 | 1 | 26.7 | 18,071,600 | 907.0 | 0.116 | 173.2 |
S/2020 S4 | 1 | 26.5 | 18,115,900 | 910.3 | 0.389 | 43.4 |
S/2004 S42 | 1 | 26.1 | 18,119,500 | 910.6 | 0.157 | 165.8 |
Greip | 4 | 25.1 | 18,206,000 | 921.2 | 0.326 | 179.8 |
Tarvos | 13 | 22.1 | 18,215,200 | 926.4 | 0.528 | 38.6 |
Hyrrokkin | 8 | 23.5 | 18,342,600 | 931.9 | 0.331 | 150.3 |
S/2020 S5 | 1 | 26.5 | 18,422,200 | 933.5 | 0.135 | 49.4 |
S/2004 S13 | 6 | 24.5 | 18,455,800 | 942.6 | 0.266 | 168.9 |
S/2007 S6 | 1 | 26.0 | 18,563,700 | 944.3 | 0.172 | 165.8 |
Mundilfari | 6 | 23.8 | 18,590,300 | 952.9 | 0.210 | 168.4 |
S/2006 S1 | 6 | 24.6 | 18,745,600 | 964.2 | 0.105 | 155.2 |
S/2006 S10 | 1 | 26.2 | 18,837,300 | 965.3 | 0.154 | 161.5 |
S/2004 S43 | 1 | 26.3 | 18,918,200 | 971.5 | 0.390 | 172.0 |
S/2019 S5 | 1 | 26.7 | 18,919,000 | 971.54 | 0.183 | 155.6 |
Gridr | 6 | 24.4 | 19,250,700 | 1,004.8 | 0.187 | 163.9 |
Bergelmir | 6 | 24.2 | 19,269,100 | 1,005.6 | 0.144 | 158.7 |
Jarnsaxa | 6 | 24.7 | 19,279,700 | 1,006.9 | 0.21 | 163 |
Narvi | 8 | 24.0 | 19,286,500 | 1,003.8 | 0.449 | 143.7 |
Suttungr | 6 | 23.9 | 19,391,700 | 1,016.7 | 0.116 | 175.0 |
S/2004 S17 | 4 | 25.2 | 19,408,100 | 1,017.5 | 0.179 | 167.9 |
S/2004 S44 | 2 | 25.5 | 19,478,800 | 1,015.0 | 0.129 | 169.0 |
S/2007 S3 | 5 | 24.9 | 19,513,700 | 1,026.4 | 0.162 | 175.6 |
S/2006 S11 | 1 | 26.2 | 19,523,200 | 1,018.4 | 0.137 | 172.0 |
Hati | 6 | 24.4 | 19,697,100 | 1,040.3 | 0.375 | 165.0 |
S/2004 S12 | 5 | 24.8 | 19,770,700 | 1,046.1 | 0.325 | 163.0 |
S/2006 S12 | 2 | 25.9 | 19,837,600 | 1,043.2 | 0.485 | 39.0 |
Eggther | 4 | 24.5 | 19,884,700 | 1,052.3 | 0.157 | 165.0 |
S/2019 S6 | 2 | 25.8 | 19,996,100 | 1,055.7 | 0.193 | 46.3 |
S/2004 S45 | 2 | 25.6 | 20,037,400 | 1,059.0 | 0.464 | 150.1 |
S/2006 S13 | 1 | 26.1 | 20,072,600 | 1,061.7 | 0.273 | 164.8 |
S/2004 S46 | 1 | 26.5 | 20,213,900 | 1,073.0 | 0.229 | 176.0 |
Farbauti | 5 | 24.7 | 20,292,500 | 1,087.3 | 0.248 | 157.1 |
S/2019 S8 | 1 | 26.1 | 20,309,500 | 1,080.6 | 0.301 | 173.9 |
Thrymr | 6 | 23.9 | 20,326,500 | 1,091.8 | 0.467 | 174.8 |
Bestla | 7 | 23.8 | 20,337,900 | 1,087.5 | 0.461 | 136.3 |
S/2004 S7 | 6 | 24.5 | 20,435,200 | 1,100.0 | 0.462 | 163.3 |
S/2019 S7 | 1 | 26.1 | 20,475,400 | 1,093.9 | 0.247 | 172.9 |
S/2019 S11 | 1 | 26.1 | 20,518,700 | 1,097.3 | 0.577 | 150.6 |
S/2007 S9 | 2 | 25.5 | 20,548,000 | 1,099.7 | 0.282 | 156.7 |
Angrboda | 3 | 25.3 | 20,591,000 | 1,114.1 | 0.216 | 177.4 |
S/2019 S9 | 1 | 26.2 | 20,605,100 | 1,104.3 | 0.345 | 161.7 |
Aegir | 6 | 24.4 | 20,664,600 | 1,119.3 | 0.255 | 166.9 |
Beli | 3 | 25.4 | 20,703,800 | 1,121.8 | 0.087 | 157.3 |
S/2019 S10 | 1 | 26.5 | 20,918,200 | 1,129.5 | 0.268 | 161.2 |
S/2019 S12 | 2 | 25.9 | 20,930,400 | 1,130.4 | 0.534 | 166.9 |
Gerd | 3 | 25.2 | 20,947,500 | 1,143.0 | 0.517 | 174.4 |
S/2019 S13 | 1 | 26.4 | 20,959,700 | 1,132.9 | 0.377 | 178.6 |
S/2005 S5 | 1 | 26.2 | 21,030,100 | 1,138.6 | 0.51 | 172.5 |
Gunnlod | 4 | 25.0 | 21,141,900 | 1,158.0 | 0.251 | 160.4 |
S/2020 S6 | 1 | 26.3 | 21,159,200 | 1,149.1 | 0.428 | 169.3 |
S/2006 S14 | 1 | 26.3 | 21,177,900 | 1,150.6 | 0.056 | 164.4 |
S/2019 S15 | 1 | 26.5 | 21,246,200 | 1,156.2 | 0.254 | 157.5 |
S/2006 S3 | 6 | 24.6 | 21,352,700 | 1,174.7 | 0.443 | 157.3 |
Skrymir | 4 | 24.8 | 21,448,000 | 1,185.1 | 0.437 | 175.6 |
S/2006 S15 | 2 | 25.9 | 21,580,000 | 1,183.6 | 0.117 | 161.3 |
S/2020 S8 | 1 | 26.1 | 21,800,100 | 1,201.7 | 0.273 | 163.3 |
S/2004 S28 | 4 | 24.9 | 21,867,800 | 1,220.8 | 0.160 | 169.4 |
S/2006 S16 | 1 | 26.3 | 21,988,900 | 1,217.4 | 0.228 | 165.2 |
Alvaldi | 4 | 24.6 | 21,995,600 | 1,232.2 | 0.238 | 177.4 |
S/2004 S50 | 1 | 26.1 | 22,010,000 | 1,219.1 | 0.377 | 164.8 |
Kari | 7 | 23.9 | 22,029,700 | 1,231.0 | 0.482 | 153.0 |
Geirrod | 4 | 25.1 | 22,259,500 | 1,251.1 | 0.539 | 154.4 |
Fenrir | 4 | 25.0 | 22,331,800 | 1,260.3 | 0.136 | 164.3 |
S/2006 S17 | 2 | 25.9 | 22,528,900 | 1,262.5 | 0.384 | 165.5 |
S/2004 S48 | 2 | 25.7 | 22,362,500 | 1,248.5 | 0.416 | 159.9 |
Surtur | 6 | 24.8 | 22,753,800 | 1,296.5 | 0.449 | 168.3 |
S/2004 S49 | 2 | 25.8 | 22,859,200 | 1,290.3 | 0.454 | 158.3 |
Loge | 6 | 24.6 | 22,918,300 | 1,311.8 | 0.192 | 166.9 |
Ymir | 16 | 21.7 | 22,957,100 | 1,315.2 | 0.337 | 173.1 |
S/2004 S21 | 3 | 25.4 | 23,125,000 | 1,325.3 | 0.409 | 155.0 |
S/2004 S39 | 2 | 25.5 | 23,195,400 | 1,336.2 | 0.102 | 167.1 |
S/2019 S17 | 2 | 25.8 | 23,233,300 | 1,322.2 | 0.430 | 156.3 |
S/2006 S18 | 2 | 25.9 | 23,256,000 | 1,324.1 | 0.089 | 171.6 |
S/2006 S19 | 2 | 25.9 | 23,262,900 | 1,324.7 | 0.575 | 174.1 |
S/2004 S24 | 3 | 25.2 | 23,339,900 | 1,341.3 | 0.072 | 36.5 |
S/2004 S36 | 3 | 25.3 | 23,433,600 | 1,353,2 | 0.617 | 152.5 |
S/2019 S19 | 1 | 26.4 | 23,471,900 | 1,342.6 | 0.372 | 146.8 |
S/2019 S20 | 1 | 26.6 | 23,483,700 | 1,343.6 | 0.294 | 156.2 |
S/2019 S18 | 1 | 26.5 | 23,555,400 | 1,349.7 | 0.487 | 148.4 |
Thiazzi | 4 | 25.0 | 23,577,500 | 1,366.7 | 0.511 | 158.8 |
S/2019 S16 | 1 | 26.4 | 23,677,600 | 1,360.3 | 0.243 | 160.7 |
S/2004 S53 | 1 | 26.1 | 23,764,100 | 1,367.7 | 0.226 | 161.0 |
S/2004 S34 | 3 | 25.3 | 24,145,500 | 1420.8 | 0.279 | 168.3 |
Fornjot | 6 | 24.6 | 24,937,300 | 1,494.0 | 0.214 | 169.5 |
S/2020 S10 | 1 | 26.7 | 25,046,000 | 1,479.9 | 0.310 | 163.7 |
S/2004 S51 | 2 | 25.8 | 25,771,800 | 1,544.7 | 0.198 | 169.6 |
S/2020 S9 | 2 | 25.9 | 26,000,300 | 1,565.2 | 0.521 | 161.1 |
S/2019 S21 | 2 | 25.9 | 26,075,800 | 1,572.1 | 0.125 | 171.5 |
S/2004 S52 | 1 | 26.1 | 26,091,500 | 1,573.5 | 0.290 | 162.9 |
S/2004 S26 | 4 | 25.0 | 26,097,100 | 1,603.9 | 0.148 | 172.9 |
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 | 0.000 | 0.2 |
Ophelia | 23 | 23.3 | 53,800 | 0.4 | 0.011 | 0.1 |
Bianca | 51 | 22.5 | 59,200 | 0.4 | 0.001 | 0.2 |
Cressida | 80 | 21.6 | 61,800 | 0.5 | 0.000 | 0.1 |
Desdemona | 64 | 22.0 | 62,700 | 0.5 | 0.000 | 0.1 |
Juliet | 94 | 21.1 | 64,400 | 0.5 | 0.001 | 0.0 |
Portia | 135 | 20.4 | 66,100 | 0.5 | 0.000 | 0.0 |
Rosalind | 72 | 21.8 | 69,900 | 0.6 | 0.000 | 0.0 |
Cupid | 10 | 26.0 | 74,400 | 0.6 | 0.005 | 0.1 |
Belinda | 81 | 21.5 | 75,300 | 0.6 | 0.000 | 0.0 |
Perdita | 40 | 23.6 | 76,400 | 0.6 | 0.002 | 0 |
Puck | 162 | 19.8 | 86,000 | 0.8 | 0.000 | 0.3 |
Mab | 10 | 26.0 | 97,700 | 0.9 | 0.003 | 0.1 |
Miranda | 472 | 15.8 | 129,900 | 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 | 0.001 | 0.1 |
Oberon | 1,523 | 13.7 | 583,400 | 13.5 | 0.001 | 0.1 |
Francisco | 12 | 25.0 | 4,283,000 | 267.1 | 0.139 | 147.4 |
Caliban | 89 | 22.4 | 7,230,000 | 579.7 | 0.204 | 142.0 |
Stephano | 20 | 24.1 | 8,004,000 | 677.5 | 0.218 | 143.9 |
Trinculo | 10 | 25.4 | 8,505,000 | 749.6 | 0.219 | 167.1 |
Sycorax | 190 | 20.8 | 12,180,000 | 1,289.2 | 0.521 | 159.3 |
Margaret | 11 | 25.2 | 14,070,000 | 1,648.1 | 0.678 | 57.7 |
Prospero | 30 | 20.8 | 16,267,000 | 1,980.4 | 0.439 | 151.7 |
Setebos | 30 | 23.3 | 17,444,000 | 2,228.7 | 0.588 | 158.2 |
Ferdinand | 12 | 25.1 | 20,648,000 | 2,816.3 | 0.397 | 169.8 |
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 |
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 |
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 |
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