Planet | Satellite | Discoverers of moons | Average distance from center of planet (km) | Orbital (sidereal) period* (days) | Orbital eccentricity | Diameter of satellite (km) | Mass (kg) |
|---|---|---|---|---|---|---|---|
EARTH | Moon | — | 384,400 | 27.322 | 0.0549 | 3476 | 7.349 × 1022 |
MARS | Phobos | Hall (1877) | 9,378 | 0.319 | 0.02 | 28 × 23 × 2 | 1.1 × 1016 |
| Deimos | Hall (1877) | 23,459 | 1.262 | 0.00 | 16 × 12 × 10 | 2.4 × 1015 |
JUPITER | Io | Galileo (1610) | 421,600 | 1.769 | 0.00 | 3643 | 8.93 × 1022 |
| Europa | Galileo (1610) | 670,900 | 3.551 | 0.01 | 3138 | 4.80 × 1022 |
| Ganymede | Galileo (1610) | 1,070,000 | 7.155 | 0.00 | 5268 | 1.48 × 1023 |
| Callisto | Galileo (1610) | 1,883,000 | 16.689 | 0.01 | 4821 | 1.08 × 1023 |
SATURN | Mimas | Herschel (1789) | 185,520 | 0.942 | 0.02 | 392 | 3.8 × 1019 |
| Enceladus | Herschel (1789) | 238,020 | 1.370 | 0.00 | 444 | 7.3 × 1019 |
| Tethys | Cassini (1684) | 294,660 | 1.888 | 0.00 | 1050 | 6.3 × 1020 |
| Dione | Cassini (1684) | 377,400 | 2.737 | 0.00 | 1120 | 1.1 × 1021 |
| Rhea | Cassini (1672) | 527,040 | 4.518 | 0.00 | 1528 | 2.3 × 1021 |
| Titan | Huygens (1655) | 1,221,830 | 15.945 | 0.03 | 5150 | 1.3 × 1023 |
| Iapetus | Cassini (1671) | 3,561,300 | 79.330 | 0.03 | 1436 | 1.6 × 1021 |
URANUS | Miranda | Kuiper (1948) | 129,872 | 1.413 | 0.00 | −470 | 6.6 × 1019 |
| Ariel | Lassell (1851) | 190,945 | 2.520 | 0.00 | −1160 | 1.4 × 1021 |
| Umbriel | Lassell (1851) | 265,998 | 4.144 | 0.01 | 1169 | 1.2 × 1021 |
| Titania | Herschel (1787) | 436,298 | 8.706 | 0.00 | 1578 | 3.5 × 1021 |
| Oberon | Herschel (1787) | 583,519 | 13.463 | 0.00 | 1523 | 3.0 × 1021 |
NEPTUNE | Triton | Lassell (1846) | 354,760 | 5.877R | 0.00 | 2704 | 2.14 × 1022 |
| Nereid | Kuiper (1949) | 5,513,400 | 360.1 | 0.75 | 340 | 2 × 1019 |