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Major Moons in the Solar System

year
discovered		 discoverer distance from
planet (km)		 diameter
(km)
Earth - 1 Moon
Moon ? ? 384,400 3476
Mars - 2 Moons
Deimos 1877 A. Hall 23,460 8
Phobos 1877 A. Hall 9,270 28 X 20
Jupiter - 16 Moons, 4 Major
Callisto 1610 Galileo 1,883,000 4,800
Europa 1610 Galileo 670,900 3126
Ganymede 1610 Galileo 1,070,000 5276
Io 1610 Galileo 421,600 1769
Saturn - 18 Moons
Dione 1684 G. Cassini 377,400 1120
Enceladus 1789 W. Herschel 238,020 498
Iapetus 1671 G. Cassini 3,561,300 1436
Mimas 1789 W. Herschel 185,520 398
Rhea 1672 G. Cassini 527,040 1528
Tethys 1684 G. Cassini 294,660 1060
Titan 1655 C. Huygens 1,221,850 5150
Uranus - 15 Moons
Ariel 1851 W. Lassell 191,240 1160
Miranda 1948 G. Kuiper 129,780 472
Oberon 1787 W. Herschel 582,600 1526
Titania 1787 W. Herschel 435,840 1580
Umbriel 1851 W. Lassel 265,970 1190
Neptune - 8 Moons
Nereid 1949 G. Kuiper 5,513,400 340
Triton 1846 W. Lassel 354,800 2705
Pluto - 1 Moon
Charon 1978 J. Christy 19,640 1200
year
discovered		 discoverer distance from
planet (km)		 diameter
(km)		 orbital period
(days)
Earth - 1 Moon
Moon ? ? 384,400 3476 27.322
Mars - 2 Moons
Deimos 1877 A. Hall 23,460 8 1.263
Phobos 1877 A. Hall 9,270 28 X 20 0.319
Jupiter - 16 Moons
Callisto 1610 Galileo 1,883,000 4,800 16.689
Europa 1610 Galileo 670,900 3126 3.551
Ganymede 1610 Galileo 1,070,000 5276 7.155
Io 1610 Galileo 421,600 1769 1.769
Saturn - 18 Moons
Dione 1684 G. Cassini 377,400 1120 2.737
Enceladus 1789 W. Herschel 238,020 498 1.370
Iapetus 1671 G. Cassini 3,561,300 1436 14.72
Mimas 1789 W. Herschel 185,520 398 0.942
Rhea 1672 G. Cassini 527,040 1528 4.518
Tethys 1684 G. Cassini 294,660 1060 1.888
Titan 1655 C. Huygens 1,221,850 5150 15.945
Uranus - 15 Moons
Ariel 1851 W. Lassell 191,240 1160 2.520
Miranda 1948 G. Kuiper 129,780 472 1.414
Oberon 1787 W. Herschel 582,600 1526 13.463
Titania 1787 W. Herschel 435,840 1580 8.706
Umbriel 1851 W. Lassel 265,970 1190 4.144
Neptune - 8 Moons
Nereid 1949 G. Kuiper 5,513,400 340 360.16
Triton 1846 W. Lassel 354,800 2705 5.877
Pluto - 1 Moon
Charon 1978 J. Christy 19,640 1200 6.387
year
discovered		 discoverer distance from
planet (km)		 diameter
(km)		 orbital period
(days)
Earth - 1 Moon
Moon ? ? 384,400 3476 27.322
Mars - 2 Moons
Deimos 1877 A. Hall 23,460 8 1.263
Phobos 1877 A. Hall 9,270 28 X 20 0.319
Jupiter - 16 Moons
Adrastea 1979 Jewitt &
Danielson		 128,980 26 X 16 0.298
Amalthea 1892 E. Barnard 181,300 262 X 134 0.498
Ananke 1951 S. Nicholson 21,200,000 20 631
Callisto 1610 Galileo 1,883,000 4,800 16.689
Carme 1938 S. Nicholson 22,600,000 30 692
Elara 1905 C. Perrine 11,737,000 80 259.65
Europa 1610 Galileo 670,900 3126 3.551
Ganymede 1610 Galileo 1,070,000 5276 7.155
Himalia 1904 C. Perrine 11,480,000 170 250.57
Io 1610 Galileo 421,600 1769 1.769
Leda 1974 C. Kowal 11,094,000 10 238.72
Lysithea 1938 S. Nicholson 11,720,000 24 259.22
Metis 1979 S. Sunnott 127,960 40 0.295
Pasiphae 1908 P. Melotte 23,500,000 36 735
Sinope 1914 S. Nicholson 23,700,700 28 758
Thebe 1979 S. Synnott 221,900 100 0.675
Saturn - 18 Moons
1981S13 1990 Mark R. Showalter 133,630 19.32 0.5750
Atlas 1980 R. Terrile 137,640 37 X 27 0.602
Calypso 1980 B. Smith 294,660 30 X 16 1.888
Dione 1684 G. Cassini 377,400 1120 2.737
Enceladus 1789 W. Herschel 238,020 498 1.370
Epimetheus 1966 R. Walker 151,422 138 X 110 0.694
Helene 1980 Laques &
Lecacheux		 377,400 36 X 28 2.737
Hyperion 1848 W. Bond 1,481,000 360 X 226 21.277
Iapetus 1671 G. Cassini 3,561,300 1436 14.72
Janus 1966 A. Dollfus 151,472 190 X 154 0.695
Mimas 1789 W. Herschel 185,520 398 0.942
Pandora 1980 S. Collins 141,700 110 X 62 0.629
Phoebe 1898 W. Pickering 12,952,000 220 550.48
Prometheus 1980 S. Collins 139,350 148 X 68 0.613
Rhea 1672 G. Cassini 527,040 1528 4.518
Telesto 1980 B. Smith 294,660 30 X 16 1.888
Tethys 1684 G. Cassini 294,660 1060 1.888
Titan 1655 C. Huygens 1,221,850 5150 15.945
Uranus - 15 Moons
Ariel 1851 W. Lassell 191,240 1160 2.520
Belinda 1986 Voyager 2 75,260 66 0.624
Bianca 1986 Voyager 2 75,260 42 0.433
Cordelia 1986 Voyager 2 49,750 26 0.335
Cressida 1986 Voyager 2 61,770 62 0.464
Desdemona 1986 Voyager 2 62,660 54 0.474
Juliet 1986 Voyager 2 64,360 84 0.493
Miranda 1948 G. Kuiper 129,780 472 1.414
Oberon 1787 W. Herschel 582,600 1526 13.463
Portia 1986 Voyager 2 66,085 108 0.513
Puck 1985 Voyager 2 86,010 154 0.762
Rosalind 1986 Voyager 2 69,941 54 0.558
Titania 1787 W. Herschel 435,840 1580 8.706
Umbriel 1851 W. Lassel 265,970 1190 4.144
Ophelia 1986 Voyager 2 53,440 30.4 0.3764
Neptune - 8 Moons
Despina 1989 Voyager 2 62,000 160 0.40
Galatea 1989 Voyager 2 52,500 140 0.33
Larissa 1989 Voyager 2 73,600 200 0.56
Naiad 1989 Voyager 2 48,200 50 0.30
Nereid 1949 G. Kuiper 5,513,400 340 360.16
Proteus 1989 Voyager 2 117,600 420 1.12
Thalassa 1989 Voyager 2 50,000 90 0.31
Triton 1846 W. Lassel 354,800 2705 5.877
Pluto - 1 Moon
Charon 1978 J. Christy 19,640 1200 6.387