Modelling the light curve of ‘Oumuamua: evidence for torque and disc-like shape

  title={Modelling the light curve of ‘Oumuamua: evidence for torque and disc-like shape},
  author={Sergey Mashchenko},
  journal={Monthly Notices of the Royal Astronomical Society},
  • S. Mashchenko
  • Published 9 June 2019
  • Physics, Geology
  • Monthly Notices of the Royal Astronomical Society
We present the first attempt to fit the light curve of the interstellar visitor ‘Oumuamua using a physical model that includes optional torque. We consider both conventional (Lommel–Seeliger triaxial ellipsoid) and alternative (‘black-and-white ball’, ‘solar sail’) brightness models. With all the brightness models, some torque is required to explain the timings of the most conspicuous features – deep minima – of the asteroid’s light curve. Our best-fitting models are a thin disc (aspect ratio… 
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