“Amalthea is the third moon of Jupiter in order of distance from the planet. It is irregularly shaped, with the best ellipsoidal approximation being 250 × 146 × 128 km. The surface of Amalthea is very red. The reddish color may be due to sulfur originating from Io or some other non-ice material. Bright patches of green appear on the major slopes of Amalthea, but the nature of this color is currently unknown.”
- from http://en.wikipedia.org/wiki/Amalthea_(moon)
This is #3 in my ‘Exoplanets’ series. While it’s a moon (and not technically a planet), Amalthea is still an interesting location within the Solar System.