Nereid from space: Rotation, size and shape analysis from K2, Herschel and Spitzer observations

  title={Nereid from space: Rotation, size and shape analysis from K2, Herschel and Spitzer observations},
  author={Cs. P. Kiss and Andr'as P'al and Anik'o Farkas-Tak'acs and Gyula M. Szab'o and R'obert Szab'o and L{\'a}szl{\'o} L. Kiss and L'aszl'o Moln'ar and Kriszti'an S'arneczky and Th.G. Muller and Michael Mommert and J. Stansberry},
  journal={Monthly Notices of the Royal Astronomical Society},
In this paper, we present an analysis of K2 mission Campaign 3 observations of the irregular Neptune satellite, Nereid. We determined a rotation period of P = 11.594±0.017 h and amplitude of Δm = 0.0328m ± 0.0018m, confirming previous short rotation periods obtained in ground-based observations. The similarities of light-curve amplitudes between 2001 and 2015 show that Nereid is in a low-amplitude rotation state nowadays and it could have been in a high-amplitude rotation state in the mid-1960s… 

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