Saturne
Mass (kg)............................................5.69 x 10^26
Diameter (km)........................................120660
Mean density (kg/m^3) ...............................690
Escape velocity (m/sec)..............................35600
Average distance from Sun (AU).......................9.539
Rotation period (length of day) (in Earth hours).....10.2
Revolution period (length of year) (in Earth years)..29.46
Obliquity (tilt of axis) (degrees)...................26.7
Orbit inclination (degrees)..........................2.49
Orbit eccentricity...................................0.056
Mean temperature (K).................................88 K (1 bar level)
Visual geometric albedo..............................0.46
Atmospheric components...............................97% hydrogen,
3% helium,
.05% methane
Rings................................................Rings are
270,000 km in diameter, but only a few hundred meters thick.
Particles are centimeters to decameters in size and are ice (some
may be covered with ice); there are traces of silicate
and carbon minerals. There are four main ring groups and three
more faint, narrow ring groups separated by gaps called divisions.
LES SATELLITES NATURELS
| Nom de la Lune |
# | Rayon (km) |
Masse (kg) |
Distance de Jupiter (km) |
Nom du découvreur |
Date |
|---|---|---|---|---|---|---|
| Pan | XVIII | 9.655 | ? | 133,583 | M. Showalter | 1990 |
| Atlas | XV | 20x15 | ? | 137,640 | R. Terrile | 1980 |
| Prométhée | XVI | 72.5x42.5x32.5 | 2.7e+17 | 139,350 | S. Collins | 1980 |
| Pandore | XVII | 57x42x31 | 2.2e+17 | 141,700 | S. Collins | 1980 |
| Epiméthée | XI | 72x54x49 | 5.6e+17 | 151,422 | R. Walker | 1966 |
| Janus | X | 98x96x75 | 2.01e+18 | 151,472 | A. Dollfus | 1966 |
| Mimas | I | 196 | 3.80e+19 | 185,520 | W. Herschel | 1789 |
| Encelade | II | 250 | 8.40e+19 | 238,020 | W. Herschel | 1789 |
| Téthys | III | 530 | 7.55e+20 | 294,660 | G. Cassini | 1684 |
| Telesto | XIII | 17x14x13 | ? | 294,660 | B. Smith | 1980 |
| Calypso | XIV | 17x11x11 | ? | 294,660 | B. Smith | 1980 |
| Dioné | IV | 560 | 1.05e+21 | 377,400 | G. Cassini | 1684 |
| Hélène | XII | 18x16x15 | ? | 377,400 | Laques-Lecacheux | 1980 |
| Rhéa | V | 765 | 2.49e+21 | 527,040 | G. Cassini | 1672 |
| Titan | VI | 2,575 | 1.35e+23 | 1,221,850 | C. Huygens | 1655 |
| Hyperion | VII | 205x130x110 | 1.77e+19 | 1,481,000 | W. Bond | 1848 |
| Japet | VIII | 730 | 1.88e+21 | 3,561,300 | G. Cassini | 1671 |
| Phoebé | IX | 110 | 4.0e+18 | 12,952,000 | W. Pickering | 1898 |
