Assertion: retrograde moon | /r/CapableOf | orbit pluto
Facets:
value: stably
type: DEGREE
Source sentences:
text: The Pluto system is highly compact and largely empty: Prograde moons could stably orbit Pluto out to 53% of the Hill radius (the gravitational zone of Pluto's influence) of 6 million km, or out to 69% for retrograde moons.