Name↕ | Parent↕ | Numeral↕ | Average orbital speed (km/s)↕ | Mean radius (km)↕ | Mass (10 kg)↕ | Orbital semi-major axis (km)↕ | Sidereal period (d) (r = retrograde)↕ | Discovery year↕ | Year Announced↕ | Discovered by↕ | Apparent Magnitude↕ | Notes↕ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Moon | Earth | I (1) | 1.02 | 1,738 | 73,460 | 384,399 | 27.32 | Prehistoric | Prehistory | — | -12.9 to -2.5 | Synchronous rotation (Binary) |
Phobos | Mars | I (1) | 2.14 | 11.267 | 0.01 | 9,380 | 0.32 | 1877 | 1877 | Hall | 11.8 | Synchronous rotation |
Deimos | Mars | II (2) | 1.35 | 6.2±0.18 | 0 | 23,460 | 1.26 | 1877 | 1877 | Hall | 12.89 | Synchronous rotation |
Io | Jupiter | I (1) | 17.33 | 1,821.6±0.5 | 89,300 | 421,800 | 1.77 | 1610 | 1610 | Galileo | 5.02 | Main-group moon (Galilean) |
Europa | Jupiter | II (2) | 13.7 | 1,560.8±0.5 | 47,990 | 671,100 | 3.55 | 1610 | 1610 | Galileo | 5.29 | Main-group moon (Galilean) |
Ganymede | Jupiter | III (3) | 10.9 | 2,634.1±0.3 | 148,150 | 1,070,400 | 7.16 | 1610 | 1610 | Galileo | 4.61 | Main-group moon (Galilean) |
Callisto | Jupiter | IV (4) | 8.2 | 2,410.3±1.5 | 107,570 | 1,882,700 | 16.69 | 1610 | 1610 | Galileo | 5.65 | Main-group moon (Galilean) |
Amalthea | Jupiter | V (5) | 26.47 | 83.5±2 | 181,400 | 0.5 | 1892 | 1892 | Barnard | 14.1 | Inner moon (Amalthea) | |
Himalia | Jupiter | VI (6) | 3.34 | 69.8 | 11,461,000 | 250.56 | 1904 | 1905 | Perrine | 14.6 | Prograde irregular (Himalia) | |
Elara | Jupiter | VII (7) | 3.29 | 39.95 | 11,741,000 | 259.64 | 1905 | 1905 | Perrine | 16.6 | Prograde irregular (Himalia) | |
Pasiphae | Jupiter | VIII (8) | (unsure) | 28.9 | 23,624,000 | 743.63 (r) | 1908 | 1908 | Melotte | 16.9 | Retrograde irregular (Pasiphae) | |
Sinope | Jupiter | IX (9) | 2.26 | 17.5 | 23,939,000 | 758.90 (r) | 1914 | 1914 | Nicholson | 18.3 | Retrograde irregular (Pasiphae) | |
Lysithea | Jupiter | X (10) | 3.29 | 21.1 | 11,717,000 | 259.2 | 1938 | 1938 | Nicholson | 18.2 | Prograde irregular (Himalia) | |
Carme | Jupiter | XI (11) | 2.28 | 23.3 | 23,404,000 | 734.17 (r) | 1938 | 1938 | Nicholson | 18.9 | Retrograde irregular (Carme) | |
Ananke | Jupiter | XII (12) | -2.44 | 14.55 | 21,276,000 | 629.77 (r) | 1951 | 1951 | Nicholson | 18.9 | Retrograde irregular (Ananke) | |
Leda | Jupiter | XIII (13) | 10.75 | 11,165,000 | 240.92 | 1974 | 1974 | Kowal | 20.2 | Prograde irregular (Himalia) | ||
Thebe | Jupiter | XIV (14) | 23.92 | 49.3±2.0 | 0.45 | 221,900 | 0.68 | 1979 | 1980 | Synnott (Voyager 1) | 15.7 | Inner moon (Amalthea) |
Adrastea | Jupiter | XV (15) | 31.38 | 8.2±2.0 | 0 | 129,000 | 0.3 | 1979 | 1979 | Jewitt, Danielson (Voyager 1) | 19.1 | Inner moon (Amalthea) |
Metis | Jupiter | XVI (16) | 31.5 | 21.5±2.0 | 128,000 | 0.29 | 1979 | 1980 | Synnott (Voyager 1) | 17.5 | Inner moon (Amalthea) | |
Callirrhoe | Jupiter | XVII (17) | 4.8 | 24,103,000 | 758.77 (r) | 1999 | 2000 | Scotti, Spahr, McMillan, Larsen, Montani, Gleason, Gehrels | 20.8 | Retrograde irregular (Pasiphae) | ||
Themisto | Jupiter | XVIII (18) | 4.5 | 7,284,000 | 130.02 | 1975/2000 | 1975/2000 | Kowal and Roemer (original); Sheppard, Jewitt, Fernández, Magnier (rediscovery) | 21 | Prograde irregular (Themisto) | ||
Megaclite | Jupiter | XIX (19) | 2.7 | 23,493,000 | 752.86 (r) | 2000 | 2001 | Sheppard, Jewitt, Fernández, Magnier, Dahm, Evans | 21.7 | Retrograde irregular (Pasiphae) | ||
Taygete | Jupiter | XX (20) | 2.5 | 23,280,000 | 732.41 (r) | 2000 | 2001 | Sheppard, Jewitt, Fernández, Magnier, Dahm, Evans | 21.9 | Retrograde irregular (Carme) | ||
Chaldene | Jupiter | XXI (21) | 1.9 | 23,100,000 | 723.72 (r) | 2000 | 2001 | Sheppard, Jewitt, Fernández, Magnier, Dahm, Evans | 22.5 | Retrograde irregular (Carme) | ||
Harpalyke | Jupiter | XXII (22) | 2.2 | 20,858,000 | 623.32 (r) | 2000 | 2001 | Sheppard, Jewitt, Fernández, Magnier, Dahm, Evans | 22.2 | Retrograde irregular (Ananke) | ||
Kalyke | Jupiter | XXIII (23) | 3.45 | 23,483,000 | 742.06 (r) | 2000 | 2001 | Sheppard, Jewitt, Fernández, Magnier, Dahm, Evans | 21.8 | Retrograde irregular (Carme) | ||
Iocaste | Jupiter | XXIV (24) | 2.6 | 21,060,000 | 631.60 (r) | 2000 | 2001 | Sheppard, Jewitt, Fernández, Magnier, Dahm, Evans | 21.8 | Retrograde irregular (Ananke) | ||
Erinome | Jupiter | XXV (25) | 1.6 | 23,196,000 | 728.46 (r) | 2000 | 2001 | Sheppard, Jewitt, Fernández, Magnier, Dahm, Evans | 22.8 | Retrograde irregular (Carme) | ||
Isonoe | Jupiter | XXVI (26) | 1.9 | 23,155,000 | 726.23 (r) | 2000 | 2001 | Sheppard, Jewitt, Fernández, Magnier, Dahm, Evans | 22.5 | Retrograde irregular (Carme) | ||
Praxidike | Jupiter | XXVII (27) | 3.5 | 20,908,000 | 625.39 (r) | 2000 | 2001 | Sheppard, Jewitt, Fernández, Magnier, Dahm, Evans | 21.2 | Retrograde irregular (Ananke) | ||
Autonoe | Jupiter | XXVIII (28) | 2 | 24,046,000 | 760.95 (r) | 2001 | 2002 | Sheppard, Jewitt, Kleyna | 22 | Retrograde irregular (Pasiphae) | ||
Thyone | Jupiter | XXIX (29) | 2 | 20,939,000 | 627.21 (r) | 2001 | 2002 | Sheppard, Jewitt, Kleyna | 22.3 | Retrograde irregular (Ananke) | ||
Hermippe | Jupiter | XXX (30) | 2 | 21,131,000 | 633.9 (r) | 2001 | 2002 | Sheppard, Jewitt, Kleyna | 22.1 | Retrograde irregular (Ananke) | ||
Aitne | Jupiter | XXXI (31) | 1.5 | 23,229,000 | 730.18 (r) | 2001 | 2002 | Sheppard, Jewitt, Kleyna | 22.7 | Retrograde irregular (Carme) | ||
Eurydome | Jupiter | XXXII (32) | 1.5 | 22,865,000 | 717.33 (r) | 2001 | 2002 | Sheppard, Jewitt, Kleyna | 22.7 | Retrograde irregular (Pasiphae) | ||
Euanthe | Jupiter | XXXIII (33) | 1.5 | 20,797,000 | 620.49 (r) | 2001 | 2002 | Sheppard, Jewitt, Kleyna | 22.8 | Retrograde irregular (Ananke) | ||
Euporie | Jupiter | XXXIV (34) | 1 | 19,304,000 | 550.74 (r) | 2001 | 2002 | Sheppard, Jewitt, Kleyna | 23.1 | Retrograde irregular (Ananke) | ||
Orthosie | Jupiter | XXXV (35) | 1 | 20,720,000 | 622.56 (r) | 2001 | 2002 | Sheppard, Jewitt, Kleyna | 23.1 | Retrograde irregular (Ananke) | ||
Sponde | Jupiter | XXXVI (36) | 1 | 23,487,000 | 748.34 (r) | 2001 | 2002 | Sheppard, Jewitt, Kleyna | 23 | Retrograde irregular (Pasiphae) | ||
Kale | Jupiter | XXXVII (37) | 1 | 23,217,000 | 729.47 (r) | 2001 | 2002 | Sheppard, Jewitt, Kleyna | 23 | Retrograde irregular (Carme) |
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