Reference image
Object guide
Dione's surface shows both heavily cratered terrain and relatively smooth regions; evidence suggests past tectonic activity and possible subsurface layers of water ice. Dione is approximately 1,122.8 km across.
How to observe Dione
Dione is resolved as a separate world mainly through imaging or spacecraft data; visually, its relationship to saturn is the key observing context.
Scientific context
Useful scale comparisons are 0.088 Earth diameters, 0.024 g surface gravity, 0.007 Earth years per orbit. These values are rounded from the catalogue measurements shown on this page.
- Radius
- 561.4 km
- Diameter
- 1,122.8 km
- Mass
- 1,095,500,000,000,000,000,000 kg
- Mean density
- 1.478 g/cm³
- Surface gravity
- 0.232 m/s² (0.024 g)
- Orbital period
- 2.7369 days (0.007 years)
- Parent body
- saturn
0.088 Earth diameters0.024 g surface gravity0.007 Earth years per orbit
Source: NASA Science (checked 2026-08-09). Values are rounded catalogue measurements.
Interactive orbit model
Aug 13, 2026, 22:251×
Calculated positions / separate exploration scales