On the Anomalous Acceleration of 1I/2017 U1 ‘Oumuamua

@article{Seligman2019OnTA,
  title={On the Anomalous Acceleration of 1I/2017 U1 ‘Oumuamua},
  author={Darryl Z. Seligman and Gregory P. Laughlin and Konstantin Batygin},
  journal={The Astrophysical Journal},
  year={2019}
}
We show that the P ~ 8 hr photometric period and the astrometrically measured A_(ng) ~ 2.5 × 10^(−4) cm s^(−2) non-gravitational acceleration (at r ~ 1.4 au) of the interstellar object 1I/2017 ('Oumuamua) can be explained by a nozzle-like venting of volatiles whose activity migrated to track the subsolar location on the object's surface. Adopting the assumption that 'Oumuamua was an elongated a × b × c ellipsoid, this model produces a pendulum-like rotation of the body and implies a long semi… 

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  • Physics, Geology
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