An Extreme Trans-Neptunian Object

Fora ASTRO-FORUM NYT FRA VIDENSKABEN An Extreme Trans-Neptunian Object

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  • #317817

    Bjarne
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      • Super Nova

      Discovery and Dynamical Analysis of an Extreme Trans-Neptunian Object with a High Orbital Inclination

      We report the discovery and dynamical analysis of 2015 BP519, an extreme Trans-Neptunian Object detected detected by the Dark Energy Survey at a heliocentric distance of 55 AU and absolute magnitude Hr= 4.3. The current orbit, determined from a 1110-day observational arc, has semi-major axis a≈ 450 AU, eccentricity e≈ 0.92 and inclination i≈ 54 degrees. With these orbital elements, 2015 BP519 is the most extreme TNO discovered to date, as quantified by the reduced Kozai action, which is is a conserved quantity at fixed semi-major axis a for axisymmetric perturbations. We discuss the orbital stability and evolution of this object in the context of the known Solar System, and find that 2015 BP519 displays rich dynamical behavior, including rapid diffusion in semi-major axis and more constrained variations in eccentricity and inclination. We also consider the long term orbital stability and evolutionary behavior within the context of the Planet Nine Hypothesis, and find that BP519 adds to the circumstantial evidence for the existence of this proposed new member of the Solar System, as it would represent the first member of the population of high-i, ϖ-shepherded TNOs.

       

      #317884

      astoft
      Deltager
        • Planet

        Interessant.
        Søren

        Søren Toft - Virum
        EOS 200D, 1620mm f/9 Astro Physics eller 200mm f/5.6 Skywatcher AZ-GTI

        #317904

        Bjarne
        Moderator
          • Super Nova

          Ja. Den bidrager til argumenter om Planet Nine. Forbiflyvningen af Gliese 710 kan blive interessant i denne sammenhæng.

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