Regarding the Accretion of 2003 VB12 (Sedna) and Like Bodies in Distant Heliocentric Orbits

Abstract

Recently, Brown et al. (2004) reported the exciting discovery of an ~800 km radius object, (90377) Sedna, on a distant, eccentric orbit centered at ~490 AU from the Sun. Here we undertake a first look exploring the feasibility of accreting this object and its possible cohorts between 75 AU (Sedna's perihelion distance) and 500 AU (Sedna's semi-major axis distance) from the Sun. We find such accretion possible in a small fraction of the age of the solar system, if such objects were initially on nearly circular orbits in this region, and if the solar nebula extended outward to distances far beyond the Kuiper Belt. If Sedna did form in situ, it is likely to be accompanied by a cohort of other large bodies in this region of the solar system.

arXiv comment06 pages, plus 2 tables and 2 figures

References in corpus (4)

• Evidence for an extended scattered disk
• Scenarios for the Origin of the Orbits of the Trans-Neptunian Objects 2000 CR105 and 2003 VB12
• Planet Formation in the Outer Solar System
• Forming the Dusty Ring in HR 4796A

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• Formation of Super-Earth Mass Planets at 125-250 AU from a Solar-type Star
• On the Rotation Period of (90377) Sedna
• Formation and Collisional Evolution of Kuiper Belt Objects
• Upper Limits on the Number of Small Bodies in Sedna-Like Orbits by the TAOS Project
• H-Atmospheres of Icy Super-Earths Formed in situ in the Outer Solar System: An Application to a Possible Planet Nine
• Peculiar orbits and asymmetries in extreme trans-Neptunian space
• Kuiperian Objects and Wandering Cosmic Objects
• Ninth Planet or Wandering Star ?