Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999mnras.304..195w&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Volume 304, Issue 1, pp. 195-198.
Astronomy and Astrophysics
Astronomy
4
Planets And Satellites: General, Planets And Satellites: Individual: Pluto, Planets And Satellites: Individual: Neptune, Planets And Satellites: Individual: Triton
Scientific paper
A computational model for the origin of the Neptune-Triton-Pluto system is described in which Triton originates in a highly eccentric heliocentric orbit and Pluto as a natural satellite of Neptune. As a result of a collision between Triton and Pluto the former is captured into a retrograde orbit about Neptune while Pluto goes into a heliocentric orbit with orbital parameters close to those presently observed. The form of the collision is such that Pluto could be disrupted with the smaller portion, corresponding to Charon, going into a retrograde orbit around Pluto. The original orbit of Triton, with perihelion 2.55 au, is consistent with an origin as a satellite of a colliding major planet in the inner Solar system. It is the latest of a sequence of convincing explanations of features of the Solar system in terms of the products of a planetary collision.
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