An Extreme Trans-Neptunian Object

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

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  • #317817
    Bjarne
    Bjarne
    Moderator
    • 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
    astoft
    Participant
    • Moon

    Interessant.
    Søren

    Søren Toft - Antroposofisk astronom.
    Virum DK og Goetheanum CH

    #317904
    Bjarne
    Bjarne
    Moderator
    • Super Nova

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

    • Dette svar blev ændret 6 dage, 2 timer siden af Bjarne.
    • Dette svar blev ændret 6 dage, 2 timer siden af Bjarne.
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