Go Astr☾nomy


Proteus
Proteus Moon

Moon of Neptune: Proteus

Proteus is the 2nd largest moon of planet Neptune. It is one of the darkest objects in the solar system, reflecting only 6-10% of light.

For a listing of all moons, see Moons of the Planets.

Proteus Facts
      1. Mass (kg)
      1. Radius (km)
      2. 200
      1. Density (gm/cm3)
      1. Distance from planet (km)
      2. 117,600
      1. Rotational period (days)
      1. Orbital period (days)
      2. 1.122315
      1. Orbital velocity (km/sec)
      2. 7.63
      1. Eccentricity of orbit
      2. 0.0004
      1. Inclination of orbit (°)
      2. 0.04
      1. Albedo
      2. 0.06
      1. Magnitude (Vo)
      2. 20.3
      1. Atmosphere