Study of the Plutino Object (208996) 2003 AZ84 from Stellar Occultations: Size, Shape, and Topographic Features

  title={Study of the Plutino Object (208996) 2003 AZ84 from Stellar Occultations: Size, Shape, and Topographic Features},
  author={A Dias-Oliveira and Bruno Sicardy and Jos{\'e} Luis Ortiz and Felipe Braga-Ribas and Rodrigo Leiva and Roberto Vieira-Martins and Gustavo Benedetti-Rossi and J. I. B. Camargo and Marcelo Assafin and Altair R. Gomes-J{\'u}nior and Tapas Baug and Thyagarajan Chandrasekhar and Josselin Desmars and Ren{\'e} Duffard and Pablo Santos-Sanz and Zhao Ergang and Shashikiran Ganesh and Yasukazu Ikari and P. Irawati and J. Jain and Zhu Liying and Andrea Richichi and Qian Shengbang and Raoul Behrend and Zouhair Benkhaldoun and Noah Brosch and Ahmed Daassou and E. Frappa and Avishay Gal-yam and Rub{\'e}n Garc{\'i}a-Lozano and Micha{\"e}l Gillon and Emmanuel Jehin and Shai Kaspi and Alain Klotz and J. J. Lecacheux and Putra Mahasena and Jean Manfroid and Ilan Manulis and Anaelle J. Maury and Vijay Mohan and Nelson Morales and Eran. O. Ofek and C. Rinner and A. S. Sharma and Stefano Sposetti and Paolo Tanga and Audrey Thirouin and Fr{\'e}d{\'e}ric Vachier and Thomas Widemann and Ayumi Asai and Hayato Watanabe and Hiroyuki Watanabe and Makoto Owada and Hinako Yamamura and Tsutomu Hayamizu and John Thomas Bradshaw and Stephen Kerr and Hideo Tomioka and Susan W. Andersson and G. Dangl and Thomas Haymes and Ram{\'o}n Naves and Guido Wortmann},
  journal={The Astronomical Journal},
We present results derived from four stellar occultations by the plutino object (208996) 2003 AZ84, detected on 2011 January 8 (single-chord event), 2012 February 3 (multi-chord), 2013 December 2 (single-chord), and 2014 November 15 (multi-chord). Our observations rule out an oblate spheroid solution for 2003 AZ84's shape. Instead, assuming hydrostatic equilibrium, we find that a Jacobi triaxial solution with semiaxes km can better account for all our occultation observations. Combining these… 

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