Assertion: asteroid's surface | /r/SimilarTo | that of pluto
Facets:
value: of neptune's moon triton
type: LOCATION
Source sentences:
text: Infrared light from the object revealed the presence of methane ice, indicating that the surface may be similar to that of Pluto, which at the time was the only TNO known to have surface methane, and of Neptune's moon Triton, which also has methane on its surface.