|
orbit: 117,600 km from Neptune
diameter: 418 km (436 x 416 x 402)
mass: ?
Proteus was a sea god who could change his shape at will.
Discovered in 1989 by Voyager 2.
Though it is larger than Nereid, it was not
discovered earlier because it is very dark and
so close to Neptune that it is
difficult to see in the glare of the much brighter planet.
Proteus is irregular (non-spherical) in shape. Proteus is probably
about as big as an irregular body can be before its gravity pulls
it into a more spherical shape.
The heavily cratered surface shows no signs of geologic activity.
... Neptune
... Larissa
... Proteus
... Triton
... 
