Reference image
Object guide
Ariel shows signs of young surface features and tectonic deformation; it may have had internal activity in the past. Ariel is approximately 1,157.8 km across.
How to observe Ariel
Ariel is resolved as a separate world mainly through imaging or spacecraft data; visually, its relationship to uranus is the key observing context.
Scientific context
Useful scale comparisons are 0.091 Earth diameters, 0.028 g surface gravity, 0.007 Earth years per orbit. These values are rounded from the catalogue measurements shown on this page.
- Radius
- 578.9 km
- Diameter
- 1,157.8 km
- Mass
- 1,350,000,000,000,000,000,000 kg
- Mean density
- 1.661 g/cm³
- Surface gravity
- 0.27 m/s² (0.028 g)
- Orbital period
- 2.52 days (0.007 years)
- Parent body
- uranus
0.091 Earth diameters0.028 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