A giant impact origin for Pluto's small moons and satellite multiplicity in the Kuiper belt

@article{Stern2006AGI,
  title={A giant impact origin for Pluto's small moons and satellite multiplicity in the Kuiper belt},
  author={S. Alan Stern and H. Weaver and Andrew J. Steffl and Max J. Mutchler and William J. Merline and Marc W. Buie and Evangeline Fung Yu Young and Leslie A. Young and John R. Spencer},
  journal={Nature},
  year={2006},
  volume={439},
  pages={946-948}
}
The two newly discovered satellites of Pluto (P1 and P2) have masses that are small compared to both Pluto and Charon—that is, between 5 × 10-4 and 1 × 10-5 of Pluto's mass, and between 5 × 10-3 and 1 × 10-4 of Charon's mass. This discovery, combined with the constraints on the absence of more distant satellites of Pluto, reveal that Pluto and its moons comprise an unusual, highly compact, quadruple system. These facts naturally raise the question of how this puzzling satellite system came to… 

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