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Proteus
Orbit data - Object data - Mythology - Links Go to the bottom of the page
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Photo of the satellite Proteus of the planet Neptune
Proteus   Neptune VIII (S/1989 N1)

Hide this area Orbit data
Mean distance from the planet Neptune 117.647 km
Orbital period around the planet Neptune (sideric) 1,122 d
Mean orbital velocity 7,62 km/s
Orbital inclination 0,039 °
Eccentricity of the orbit around the planet Neptune 0,0004
Hide this area Object data
Discovered by Stephen P. Synnott, Voyager 2 Team 1989
Mass 4,9 × 1019 kg
Equatorial radius 218 × 208 × 201 km
Mean density 1,3 g/cm³
Albedo 0,10
Apparent magnitude + 19,8 mvis
Hide this area Mythology

Proteus is a prophetic sea divinity, son of either Poseidon or Oceanus. He usually stays on the Island of Pharos, near Egypt, where he herds the seals of Poseidon.

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File icon NASA (Voyager 2) - Proteus
© Calvin J. Hamilton ("Views of the Solar System")
File icon Welcome to the Planets
Online version of the "Planetary Data System Educational CD-ROM"
File icon A Multimedia Tour of the Solar System - The Nine Planets
© William A. Arnett
© 2018 by Bernd Onasch - Imprint Go to the top of the page
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