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

    Research output: Contribution to journalArticle

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

    View graph of relations

    We report the discovery of an H r = 3.4 ± 0.1 dwarf planet candidate by the Pan-STARRS Outer Solar System Survey. 2010 JO179 is red with (g − r) = 0.88 ± 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 and 2016 provide an exceptionally well determined orbit for 2010 JO179, with a semimajor axis of 78.307 ± 0.009 au; distant orbits known to this precision are rare. We find that 2010 JO179 librates securely within the 21:5 mean-motion resonance with Neptune on 100 Myr timescales, 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.

    Documents

    Links

    DOI

    Original languageEnglish
    Article numberL6
    Number of pages9
    JournalAstrophysical Journal Letters
    Journal publication date28 Feb 2018
    Issue number1
    Volume855
    DOIs
    StatePublished - 28 Feb 2018

      Research areas

    • Kuiper belt objects: individual (2010 JO)

    ID: 135549600