Radius of Period of Diameter
Planet Satellite Discovery Orbit (km) Revolution (km)
Earth Moon -------- 3.82 x 105 27d 7h 43min 3456
Mars Phobos 1877, Hall 9.30 x 103 0 7 39 16?
Deimos 1877, Hall 2.34 x 104 1 6 18 8?
Jupiter V 1892, Bernard 1.81 x 105 0 11 53 240?
Io 1610, Galileo 4.19 x 105 1 18 28 3200
Europa 1610, Galileo 6.67 x 105 3 13 14 2896
Ganymede 1610, Galileo 1.05 x 106 7 3 43 4988
Callisto 1610, Galileo 1.87 x 106 16 16 32 4505
XIII 1974, Kowal 1.11 x 107 239 -- -- --
VI 1904, Perrine 1.14 x 107 250 14 -- 160?
VII 1905, Perrine 1.17 x 107 259 14 -- 56?
X 1938, Nicholson 1.17 x 107 260 12 -- 24?
XII 1951, Nicholson 2.09 x 107 625 -- -- 23?
XI 1938, Nicholson 2.25 x 107 700 -- -- 31?
VIII 1908, Melotte 2.35 x 107 739 -- -- 56?
IX 1914, Nicholson 2.37 x 107 758 -- -- 27?
Saturn Mimas 1789, Herschel 1.95 x 105 0 22 37 483?
Enceladus 1789, Herschel 2.38 x 105 1 9 53 563
Tethys 1684, Cassini 2.94 x 105 1 21 18 805
Diope 1684, Cassini 3.77 x 105 2 17 41 805
Rhea 1684, Cassini 5.25 x 105 4 12 25 1609
Titan 1655, Huygens 1.22 x 106 15 22 41 4586
Hyperion 1848, Bond 1.48 x 106 21 6 38 483?
Iapetus 1671, Cassinni 3.56 x 106 79 7 56 1287?
Phobe 1898, Pickering 1.29 x 107 550 -- -- 322?
Uranus Miranda 1948, Kuiper 1.30 x 105 1 9 56 --
Ariel 1851, Lassell 1.91 x 105 2 12 29 965?
Umbriel 1851, Lassell 2.67 x 105 4 3 28 6433?
Titania 1787, Herschel 4.38 x 105 8 16 56 1609?
Oberon 1787, Herschel 5.86 x 105 13 11 7 1448?
Neptune Triton 1846, Lassell 3.54 x 105 5 21 3 2781
Nereid 1949, Kuiper 5.54 x 106 359 10 -- 322?
Pluto Charon -- 1.96 x 103 -- -- -- 1172
Note: All times are related to Earth's day/night system, not the planet's own day/night times.
? denotes uncertain data
-- denotes unknown data