Mercury’s resonant rotation from secular orbital elements

  title={Mercury’s resonant rotation from secular orbital elements},
  author={Alexander Stark and Jürgen Oberst and Hauke Hussmann},
  journal={Celestial Mechanics and Dynamical Astronomy},
We used recently produced Solar System ephemerides, which incorporate 2 years of ranging observations to the MESSENGER spacecraft, to extract the secular orbital elements for Mercury and associated uncertainties. As Mercury is in a stable 3:2 spin-orbit resonance, these values constitute an important reference for the planet’s measured rotational parameters, which in turn strongly bear on physical interpretation of Mercury’s interior structure. In particular, we derive a mean orbital period of… 
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The research described in this publication was carried out by the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space