“TNOs are Cool”: a survey of the trans-Neptunian region - VII. Size and surface characteristics of (90377) Sedna and 2010 EK139

  title={“TNOs are Cool”: a survey of the trans-Neptunian region - VII. Size and surface characteristics of (90377) Sedna and 2010 EK139},
  author={Andr'as P'al and Cs. Kiss and Thomas Muller and Pablo Santos-Sanz and Esa Vilenius and N. Szalai and Michael Mommert and E. Lellouch and Miriam Rengel and Paul Hartogh and Silvia Protopapa and J. Stansberry and Jos{\'e} Luis Ortiz and Ren{\'e} Duffard and Audrey Thirouin and Florence Henry and Audrey Delsanti Konkoly Observatory and Mta Research Centre for Astronomy and Earth Sciences and Department of Physics Astronomy and Lor'and Eotvos University and Max-Planck-Institut fur extraterrestrische Physik and Lesia Paris and Cnrs and Deutsche Forschungsanstalt f{\"u}r Luft und Raumfahrt and Institut fur Planetenforschung and Max-Planck-Institut fur Sonnensystemforschung and University of Maryland and Steward Observatory and University of Arizona and Inst. de Astrof'isica de Andaluc'ia and Laboratoire d'Astrophysique de Marseille and Universit́e de Provence},
  journal={Astronomy and Astrophysics},
We present estimates of the basic physical properties (size and albedo) of (90377) Sedna, a prominent member of the detached trans-Neptunian object population and the recently discovered scattered disk object 2010 EK139, based on the recent observations acquired with the Herschel Space Observatory, within the “TNOs are Cool!” key programme. Our modeling of the thermal measurements shows that both objects have larger albedos and smaller sizes than the previous expectations, thus their surfaces… Expand

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