A long-lived horseshoe companion to the Earth

  title={A long-lived horseshoe companion to the Earth},
  author={Apostolos A. Christou and David J. Asher},
  journal={Monthly Notices of the Royal Astronomical Society},
We present a dynamical investigation of a newly found asteroid, 2010 SO 16, and the discovery that it is a horseshoe companion of the Earth. The object's absolute magnitude (H = 20.7) makes this the largest object of its type known to-date. By carrying out numerical integrations of dynamical clones, we find that (a) its status as a horseshoe is secure given the current accuracy of its ephemeris, and (b) the time spent in horseshoe libration with the Earth is several times 10 5 yr, two orders of… Expand

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