Neptune's Story

  title={Neptune's Story},
  author={Peter Goldreich and Norman W. Murray and Pierre-Yves Longaretti and D Banfield},
  pages={500 - 504}
It is conjectured that Triton was captured from a heliocentric orbit as the result of a collision with what was then one of Neptune's regular satellites. The immediate post-capture orbit was highly eccentric with a semimajor axis a ∼ 103RN and a periapse distance rp that oscillated periodically above a minimum value of about 5RN. Dissipation due to tides raised by Neptune in Triton caused Triton's orbit to evolve to its present state in ≲109 years. For much of this time Triton was almost… Expand

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