Name # Orbits Date Discoverer ---------- ----- ------- ---- ------------------ Sun - - - Mercury I Sun - - Venus II Sun - - Earth III Sun - - Moon I Earth - - Mars IV Sun - - Phobos I Mars 1877 Asaph Hall Deimos II Mars 1877 Asaph Hall Jupiter V Sun - - Metis XVI Jupiter 1979 Stephen Synnott Adrastea XV Jupiter 1979 D. Jewitt & E. Danielson Amalthea V Jupiter 1892 Edward Emerson Barnard Thebe XIV Jupiter 1979 Stephen Synnott Io I Jupiter 1610 Simon Marius & Galileo Galilei Europa II Jupiter 1610 Simon Marius & Galileo Galilei Ganymede III Jupiter 1610 Simon Marius & Galileo Galilei Callisto IV Jupiter 1610 Simon Marius & Galileo Galilei Leda XIII Jupiter 1974 C. Kowal Himalia VI Jupiter 1904 C. Perrine Lysithea X Jupiter 1938 S. Nicholson Elara VII Jupiter 1905 C. Perrine Ananke XII Jupiter 1951 S. Nicholson Carme XI Jupiter 1938 S. Nicholson Pasiphae VIII Jupiter 1908 P. Melotte Sinope IX Jupiter 1914 S. Nicholson Saturn VI Sun - - Pan XVIII Saturn 1990 Mark R. Showalter Atlas XV Saturn 1980 R. Terrile Prometheus XVI Saturn 1980 S. Collins & others Pandora XVII Saturn 1980 S. Collins & others Epimetheus XI Saturn 1980 R. Walker Janus X Saturn 1966 Audouin Dollfus Mimas I Saturn 1789 William Herschel Enceladus II Saturn 1789 William Herschel Tethys III Saturn 1684 Giovanni Domenico Cassini Telesto XIII Saturn 1980 B. Smith & others Calypso XIV Saturn 1980 B. Smith & others Dione IV Saturn 1684 Giovanni Domenico Cassini Helene XII Saturn 1980 P. Laques & J. Lecacheus Rhea V Saturn 1672 Giovanni Domenico Cassini Titan VI Saturn 1655 Christiaan Huygens Hyperion VII Saturn 1848 William Cranch Bond Iapetus VIII Saturn 1671 Giovanni Domenico Cassini Phoebe IX Saturn 1898 William Henry Pickering Uranus VII Sun 1781 William Herschel Cordelia VI Uranus 1986 Voyager 2 Ophelia VII Uranus 1986 Voyager 2 Bianca VIII Uranus 1986 Voyager 2 Cressida IX Uranus 1986 Voyager 2 Desdemona X Uranus 1986 Voyager 2 Juliet XI Uranus 1986 Voyager 2 Portia XII Uranus 1986 Voyager 2 Rosalind XIII Uranus 1986 Voyager 2 Belinda XIV Uranus 1986 Voyager 2 Puck XV Uranus 1985 Stephen Synnott Miranda V Uranus 1948 Gerard Kuiper Ariel I Uranus 1851 William Lassell Umbriel II Uranus 1851 William Lassell Titania III Uranus 1787 William Herschel Oberon IV Uranus 1787 William Herschel Neptune VIII Sun 1846 Johann Gotfried Galle Naiad III Neptune 1989 Voyager 2 Thalassa IV Neptune 1989 Voyager 2 Despina V Neptune 1989 Voyager 2 Galatea VI Neptune 1989 Voyager 2 Larissa VII Neptune 1989 Stephen Synnott Proteus VIII Neptune 1989 Stephen Synnott Triton I Neptune 1846 William Lassell Nereid II Neptune 1949 Gerard Kuiper Pluto IX Sun 1930 Clyde W. Tombaugh Charon I Pluto 1978 J. Christy Key: Name Name of the planet or satellite. Orbits Sun or planet about which it orbits. Date Date of discovery. Discoverer Discoverer.
O. Per. R. Period M.O.V.
Name (days) Incl. Tilt. Eccen. (days) (km/s)
---------- -------- ---------- ---------- ---------- --------- -------
Sun - - ? - 25-36 ?
Mercury 87.969 7.004 0.00 0.2056 58.6462 47.87
Venus 224.701 3.394 177.36 0.0068 -243.0187 35.02
Earth 365.256 0.000 23.45 0.0167 0.99727 29.79
Moon 27.32166 18.3-28.6 6.68 0.05 27.32166 1.02
Mars 686.98 1.850 25.19 0.0934 1.025957 24.13
Phobos 0.31910 1.0 ? 0.01 0.31910 2.14
Deimos 1.26244 0.9-2.7 ? 0.00 1.26244 1.35
Jupiter 4332.71 1.308 3.13 0.0483 0.41354 13.06
Metis 0.294779 0.0000 ? 0.0000 ? 31.57
Adrastea 0.298260 0.0000 ? 0.0000 ? 31.45
Amalthea 0.498179 0.40 ? 0.003 0.498179 26.47
Thebe 0.674536 1.0659 ? 0.0183 0.674536 23.92
Io 1.769138 0.040 ? 0.004 1.769138 17.33
Europa 3.551181 0.470 ? 0.009 3.551181 13.74
Ganymede 7.154553 0.195 ? 0.002 7.154553 10.88
Callisto 16.68902 0.281 ? 0.007 16.68902 8.21
Leda 238.72 26.07 ? 0.1476 ? 3.38
Himalia 250.5662 27.63 ? 0.1580 0.4 3.33
Lysithea 259.22 29.02 ? 0.107 ? 3.29
Elara 259.6528 24.77 ? 0.2072 0.5 3.29
Ananke -631 147 ? 0.1687 ? -2.44
Carme -692 163 ? 0.2068 ? -2.38
Pasiphae -735 147 ? 0.378 ? -2.33
Sinope -758 153 ? 0.275 ? -2.27
Saturn 10759.50 2.488 25.33 0.0560 0.44401 9.66
Pan 0.5750 0.0 ? 0.00 ? 16.89
Atlas 0.6019 0.0 ? 0.000 ? 16.63
Prometheus 0.6130 0.0 ? 0.003 ? 16.53
Pandora 0.6285 0.0 ? 0.004 ? 16.40
Epimetheus 0.6942 0.34 ? 0.009 0.6942 15.86
Janus 0.6945 0.14 ? 0.007 0.6945 15.86
Mimas 0.942422 1.53 ? 0.0202 0.942422 14.32
Enceladus 1.370218 0.02 ? 0.0045 1.370218 12.63
Tethys 1.887802 1.09 ? 0.0000 1.887802 11.35
Telesto 1.8878 0.0 ? 0.00 ? 11.35
Calypso 1.8878 0.0 ? 0.00 ? 11.35
Dione 2.736915 0.02 ? 0.0022 2.736915 10.03
Helene 2.7369 0.2 ? 0.005 ? 10.03
Rhea 4.517500 0.35 ? 0.0010 4.517500 8.48
Titan 15.94542 0.33 ? 0.0292 15.94542 5.57
Hyperion 21.27661 0.43 ? 0.1042 chaotic 5.06
Iapetus 79.33018 14.72 ? 0.0283 79.33018 3.26
Phoebe -550.48 175.3 ? 0.1633 0.4 -1.71
Uranus 30685.00 0.774 97.86 0.0461 -0.71833 6.80
Cordelia 0.335033 0.14 ? 0.000 ? 10.80
Ophelia 0.376409 0.09 ? 0.001 ? 10.39
Bianca 0.434577 0.16 ? 0.001 ? 9.90
Cressida 0.463570 0.04 ? 0.000 ? 9.69
Desdemona 0.473651 0.16 ? 0.000 ? 9.62
Juliet 0.493066 0.06 ? 0.001 ? 9.49
Portia 0.513196 0.09 ? 0.000 ? 9.37
Rosalind 0.558459 0.28 ? 0.000 ? 9.11
Belinda 0.623525 0.03 ? 0.000 ? 8.78
Puck 0.761832 0.31 ? 0.000 ? 8.21
Miranda 1.413479 4.22 ? 0.0027 1.413479 6.68
Ariel 2.520379 0.31 ? 0.0034 2.520379 5.52
Umbriel 4.144177 0.36 ? 0.0050 4.144177 4.67
Titania 8.705872 0.14 ? 0.0022 8.705872 3.64
Oberon 13.46324 0.10 ? 0.0008 13.46324 3.15
Neptune 60190.00 1.774 28.31 0.0097 0.67125 5.44
Naiad 0.294396 4.74 ? 0.0003 ? 11.86
Thalassa 0.311485 0.21 ? 0.0002 ? 11.67
Despina 0.334655 0.07 ? 0.0001 ? 11.41
Galatea 0.428745 0.05 ? 0.0001 ? 10.52
Larissa 0.554654 0.20 ? 0.0014 ? 9.65
Proteus 1.122315 0.04 ? 0.0004 ? 7.62
Triton -5.87685 157.35 ? 0.0000 -5.87685 -4.39
Nereid 360.1362 27.6 ? 0.7512 ? 1.11
Pluto 90800 17.148 122.52 0.2482 -6.3872 4.74
Charon 6.38725 98.80 ? 0.00 6.38725 0.22
Key:
Name Name of the planet or satellite.
O. Per. Orbital period.
Incl. Orbital inclination in degrees.
Tilt. Tilt of Axis or obliquity in degrees.
Eccen. Orbital Eccentricity.
R. Period Siderial rotational.
M.O.V. Mean Orbital Velocity.
Distance Radius Mass Density Escape Albedo
Name Vo (10^3 km) (km) (kg) (g/cm^3) (km/s)
---------- ---------- -------- -------------- ---------- ---------- ------ ------
Sun -26.8 0 695000 1.989e+30 1.410 618.02 -
Mercury -1.9 57,910 2439.7 3.303e+23 5.42 4.2507 0.10
Venus -4.4 108,200 6051.8 4.869e+24 5.25 10.362 0.65
Earth - 149,600 6378.14 5.976e+24 5.515 11.182 0.37
Moon -12.74 384.4 1737.4 7.349e+22 3.34 2.3760 0.12
Mars -2.01 227,940 3397.2 6.421e+23 3.94 5.0225 0.15
Phobos 11.3 9.380 13.5x10.8x9.4 1.08e+16 2.0 0.0103 0.06
Deimos 12.40 23.46 7.5x6.1x5.5 1.8e+15 1.7 0.0057 0.07
Jupiter -2.70 778,330 71492 1.9e+27 1.33 59.556 0.52
Metis 17.5 127.969 20 9.56e+16 2.8 0.0253 0.05
Adrastea 19.1 128.971 12.5x10x7.5 1.91e+16 4.5 0.0143 0.05
Amalthea 14.1 181.30 135x84x75 7.17e+18 1.8 0.0842 0.05
Thebe 15.7 221.895 55x45 7.77e+17 1.5 0.0434 0.05
Io 5.02 421.60 1815 8.94e+22 3.55 2.5639 0.61
Europa 5.29 670.90 1569 4.8e+22 3.01 2.0206 0.64
Ganymede 4.61 1,070 2631 1.48e+23 1.94 2.7400 0.42
Callisto 5.65 1,883 2400 1.08e+23 1.86 2.4507 0.20
Leda 20.2 11,094 8 5.68e+15 2.7 0.0097 ?
Himalia 14.84 11,480 93 9.56e+18 2.8 0.1171 0.03
Lysithea 18.4 11,720 18 7.77e+16 3.1 0.0240 ?
Elara 16.77 11,737 38 7.77e+17 3.3 0.0522 0.03
Ananke 18.9 21,200 15 3.82e+16 2.7 0.0184 ?
Carme 18.0 22,600 20 9.56e+16 2.8 0.0253 ?
Pasiphae 17.03 23,500 25 1.91e+17 2.9 0.0319 ?
Sinope 18.3 23,700 18 7.77e+16 3.1 0.0240 ?
Saturn 0.67 1,429,400 60268 5.688e+26 0.69 35.490 0.47
Pan ? 133.583 9.655 ? ? ? 0.5
Atlas 18.0 137.64 20x15 ? ? ? 0.9
Prometheus 15.8 139.35 72.5x42.5x32.5 2.7e+17 0.7* 0.0223 0.6
Pandora 16.5 141.70 57x42x31 2.2e+17 0.7* 0.0227 0.9
Epimetheus 15.7 151.422 72x54x49 5.6e+17 0.7* 0.0322 0.8
Janus 14.5 151.472 98x96x75 2.01e+18 0.67* 0.0523 0.8
Mimas 12.9 185.52 196 3.8e+19 1.17 0.1609 0.5
Enceladus 11.7 238.02 250 8.4e+19 1.24 0.2118 0.99
Tethys 10.2 294.66 530 7.55e+20 1.21 0.4360 0.9
Telesto 18.7 294.66 17x14x13 ? ? ? 0.5
Calypso 18.0 294.66 17x11x11 ? ? ? 0.6
Dione 10.4 377.4 560 1.05e+21 1.43 0.5002 0.7
Helene 18.5 377.40 18x16x15 ? ? ? 0.7
Rhea 9.7 527.04 765 2.49e+21 1.33 0.6591 0.7
Titan 8.28 1,221.85 2575 1.35e+23 1.88 2.6452 0.21
Hyperion 14.19 1,481.0 205x130x110 1.77e+19 1.4 0.1073 0.3
Iapetus 10.2-11.9 3,561.3 730 1.88e+21 1.21 0.5863 0.2
Phoebe 16.45 12,952 110 4e+18 0.7 0.0697 0.06
Uranus 5.52 2,870,990 25559 8.686e+25 1.29 21.297 0.51
Cordelia 24.1 49.750 13 ? ? ? 0.07
Ophelia 23.8 53.76 16 ? ? ? 0.07
Bianca 23.0 59.16 22 ? ? ? 0.07
Cressida 22.2 61.77 33 ? ? ? 0.07
Desdemona 22.5 62.66 29 ? ? ? 0.07
Juliet 21.5 64.36 42 ? ? ? 0.07
Portia 21.0 66.10 55 ? ? ? 0.07
Rosalind 22.5 69.93 27 ? ? ? 0.07
Belinda 22.1 75.26 34 ? ? ? 0.07
Puck 20.2 86.01 77 ? ? ? 0.07
Miranda 16.3 129.78 235.8 6.33e+19 1.15 0.1893 0.27
Ariel 14.16 191.24 578.9 1.27e+21 1.56 0.5411 0.34
Umbriel 14.81 265.97 584.7 1.27e+21 1.52 0.5384 0.18
Titania 13.73 435.84 788.9 3.49e+21 1.70 0.7684 0.27
Oberon 13.94 582.60 761.4 3.03e+21 1.64 0.7288 0.24
Neptune 7.84 4,504,300 24746 1.024e+26 1.64 23.500 0.41
Naiad 24.7 48.00 29 ? ? ? 0.06
Thalassa 23.8 50.00 40 ? ? ? 0.06
Despina 22.6 52.50 74 ? ? ? 0.06
Galatea 22.3 62.00 79 ? ? ? 0.06
Larissa 22.0 73.60 104x89 ? ? ? 0.06
Proteus 20.3 117.60 200 ? ? ? 0.06
Triton 13.47 354.80 1350 2.14e+22 2.07 1.4545 0.7
Nereid 18.7 5,513.40 170 ? ? ? 0.14
Pluto 15.12 5,913,520 1160 1.29e+22 2.05 1.2183 0.3
Charon 16.8 19.64 635 1.77e+21 1.83 0.6099 0.5
Key:
Name Name of the planet or satellite.
Vo Objects visible magnitude at opposition.
Distance Distance to the Sun or to the planet center.
Radius Radius.
Mass Mass.
Density Density.
Escape Escape Velocity.
Albedo Visual geometric albedo.