Natural Satellite
Proteus
Proteus is currently about 4,337,541,018 kilometres from Earth, or 28.99 astronomical units, which puts a one-way radio signal 4.0 hours out. It is 29.88 astronomical units from the Sun.
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One of the darkest objects in the solar system, an irregular, heavily cratered moon right at the limit of how large a body can be while staying non-spherical.
Discovered by Voyager 2 during the 1989 flyby.
Right now
- Distance from Earth
- 4,337,541,018 km (28.99 AU)
- Distance from the Sun
- 4,469,588,594 km (29.88 AU)
- One-way signal time
- 4.0 hours
The body
- Mean radius
- 210 km
- Orbital radius
- 117,647 km
- Orbital period
- 1.12 days