Proteus
Neptune 808 Proteus
📋 A written introduction is coming — for now this page shows official values only.
Physical data
- Mean radius
- 208 km
- GM
- 2.5834 km³/s²
- Density
- 1.0269 g/cm³
Source:NASA JPL Solar System Dynamics · checked 2026-11-02 ↗
Orbit
- Semi-major axis
- 117,700 km
- Eccentricity
- 0.001
- Inclination
- 0.6°
- Orbital period
- 1.1229 days
- Retrograde
- No
Source:NASA JPL Solar System Dynamics · checked 2026-11-02 ↗
Related
Parent body
In everyday life
- About 416 km across — about the length of the 400 km Seoul–Busan expressway.
- One orbit takes about 1.1 Earth days.
- About 117,700 km from Neptune on average — 294 drives along the 400 km Seoul–Busan expressway.