| Feature | Boundaries (km) | Optical Depth | Notes | |
|---|---|---|---|---|
| Inner | Outer | |||
| D Ring | 66,900 | 74,658 | 10-5 | Contains narrow ringlets at 67,580 and 71,710 km. |
| C Ring | 74,658 | 91,975 | 0.05 to 0.35 | Isolated "plateaus" among a surrounding, fainter ring. |
| Titan Ringlet | 77,871 | 77,896 | A narrow, eccentric ringlet inside a gap in the C Ring. | |
| Maxwell Ringlet | 87,491 | 87,555 | A narrow, eccentric ringlet inside a gap in the C Ring. | |
| 1.470 Rs Ringlet | 88,716 | 88,732 | A narrow, eccentric ringlet inside a gap in the C Ring. | |
| 1.495 Rs Ringlet | 90,171 | 90,232 | A narrow, eccentric ringlet inside a gap in the C Ring. | |
| B Ring | 91,975 | 117,507 | 0.4 to 2.5 | Contains fine structure on all scales. The most opaque of Saturn's rings. |
| Cassini Division | 117,507 | 122,340 | 0 to 0.1 | The prominent gap between the A and B Rings. It contains several features of low optical depth. |
| Huygens Ringlet | 117,825 | 118,185 | A narrow, eccentric ringlet near the inner edge of the Cassini Division. | |
| A Ring | 122,340 | 136,780 | 0.4 to 1.0 | A fairly uniform ring with many density and bending waves near its outer edge. |
| Encke Gap | 133,410 | 133,740 | 0 | A gap in the A Ring "shepherded" open by the embedded moon Pan. One or more faint ringlets are also present. |
| Keeler Gap | 136,510 | 136,550 | 0 | An empty gap near the outer edge of the A Ring. |
| F Ring (core) | 140,219 | 0.1 to 1 | An eccentric ringlet containing clumps and kinks. Based on its eccentricity, its radial limits are 140,194 to 140,244 km. | |
| G Ring | 166,000 | 173,200 | 10-6 | A very faint, isolated dust ring. |
| E Ring | 180,000 | 480,000 | 10-6 | A broad, faint dust ring encompassing the orbits of Mimas through Dione. Densest near the orbit of Enceladus. Up to ~ 30,000 km thick. |
| Name | Semimajor Axis (km) | Period (days) | Eccentricity | Inclination (deg) | Mean Radius (km) | Mass (1020 kg) |
|---|---|---|---|---|---|---|
| Pan | 133,583 | 0.5750 | ~ 0 | ~ 0 | 10 | |
| Atlas | 137,640 | 0.6019 | ~ 0 | ~ 0 | 16 | |
| Prometheus | 139,350 | 0.612986 | 0.0024 | 0.0 | 50 | 0.0014 |
| Pandora | 141,700 | 0.628804 | 0.0042 | 0.0 | 42 | 0.0013 |
| Epimetheus | 151,422 | 0.694590 | 0.009 | 0.34 | 59 | 0.0055 |
| Janus | 151,472 | 0.694590 | 0.007 | 0.14 | 89 | 0.0198 |
| Mimas | 185,520 | 0.9424218 | 0.0202 | 1.53 | 199 | 0.385 |
| Enceladus | 238,020 | 1.370218 | 0.0045 | 0.02 | 249 | 0.73 |
| Tethys | 294,660 | 1.887802 | 0.0000 | 1.09 | 530 | 6.22 |
| Telesto | 294,660 | 1.887802 | ~ 0 | ~ 0 | 11 | |
| Calypso | 294,660 | 1.887802 | ~ 0 | ~ 0 | 10 | |
| Dione | 377,400 | 2.736915 | 0.0022 | 0.02 | 560 | 10.52 |
| Helene | 377,400 | 2.736915 | 0.005 | 0.2 | 16 | |
| Rhea | 527,040 | 4.517500 | 0.0010 | 0.35 | 764 | 23.1 |
| Titan | 1,221,850 | 15.945421 | 0.0292 | 0.33 | 2575 | 1345.5 |
| Hyperion | 1,481,100 | 21.276609 | 0.1042 | 0.43 | 143 | |
| Iapetus | 3,561,300 | 79.330183 | 0.0283 | 7.52 | 718 | 15.9 |
| Phoebe | 12,952,000 | 550.48 | 0.163 | 175.3 | 110 |
From Murray, C. D., and S. F. Dermott 1999. Solar System Dynamics, Cambridge University Press.