A dwarf planet class object in the 21:5 resonance with Neptune

      Research output: Research - peer-reviewArticle

      • Matthew J. Holman
      • Matthew J. Payne
      • Wesley Fraser
      • Pedro Lacerda
      • Michele T. Bannister
      • Michael Lackner
      • Ying-Tung Chen
      • Hsing Wen Lin
      • Kenneth W. Smith
      • Rositako Kotanekova
      • David Young
      • K. Chambers
      • Serge Chastel
      • L. Denneau
      • A. Fitzsimmons
      • H. Flewelling
      • Tommy Grav
      • M.E. Huber
      • Nick Induni
      • Rolf-Peter Kudritzki
      • Alex Krolewski
      • R. Jedicke
      • N. Kaiser
      • E. Lilly
      • E. A. Magnier
      • Zachary Mark
      • Karen J. Meech
      • M. Micheli
      • Daniel Murray
      • Alex Parker
      • Pavlos Protopapas
      • Darin Ragozzine
      • Peter Veres
      • R. J. Wainscoat
      • C. Waters
      • Robert Weryk

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      We report the discovery of a $H_r = 3.4\pm0.1$ dwarf planet candidate by the Pan-STARRS Outer Solar System Survey. 2010 JO$_{179}$ is red with $(g-r)=0.88 \pm 0.21$, roughly round, and slowly rotating, with a period of $30.6$ hr. Estimates of its albedo imply a diameter of 600--900~km. Observations sampling the span between 2005--2016 provide an exceptionally well-determined orbit for 2010 JO$_{179}$, with a semi-major axis of $78.307\pm0.009$ au, distant orbits known to this precision are rare. We find that 2010 JO$_{179}$ librates securely within the 21:5 mean-motion resonance with Neptune on hundred-megayear time scales, joining the small but growing set of known distant dwarf planets on metastable resonant orbits. These imply a substantial trans-Neptunian population that shifts between stability in high-order resonances, the detached population, and the eroding population of the scattering disk.
      Original languageEnglish
      Pages (from-to)1-12
      JournalAstronomical Journal
      Journal publication date15 Sep 2017
      StateAccepted - 15 Sep 2017

        Research areas

      • astro-ph.EP

      ID: 135549600