Implications for Planetary System Formation from Interstellar Object 1I/2017 U1 (‘Oumuamua)

  title={Implications for Planetary System Formation from Interstellar Object 1I/2017 U1 (‘Oumuamua)},
  author={David E. Trilling and Tyler D. Robinson and Alissa Roegge and Colin Orion Chandler and Nathan Smith and Mark J. Loeffler and Chadwick A. Trujillo and Samuel Navarro-Meza and Lori M. Glaspie},
  journal={The Astrophysical Journal Letters},
The recently discovered minor body 1I/2017 U1 (‘Oumuamua) is the first known object in our solar system that is not bound by the Sun’s gravity. Its hyperbolic orbit (eccentricity greater than unity) strongly suggests that it originated outside our solar system; its red color is consistent with substantial space weathering experienced over a long interstellar journey. We carry out a simple calculation of the probability of detecting such an object. We find that the observed detection rate of 1I… 

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