Transient Jupiter Co-orbitals from Solar System Sources
arXiv:2007.14973 · doi:10.3847/1538-3881/aba2c9
Abstract
We demonstrate dynamical pathways from main-belt asteroid and Centaur orbits to those in co-orbital motion with Jupiter, including the retrograde (inclination ) state. We estimate that at any given time, there should be kilometer-scale or larger escaped asteroid in a transient direct (prograde) orbit with semimajor axis near that of Jupiter's (), with proportionally more smaller objects as determined by their size distribution. Most of these objects would be in the horseshoe dynamical state, which are hard to detect due to their moderate eccentricities (spending most of their time beyond 5 AU) and longitudes relative to Jupiter being spread nearly all over the sky. We also show that 1% of the transient asteroid co-orbital population is on retrograde orbits with Jupiter. This population, like the recently identified asteroid (514107) 2015 BZ, can spend millions of years with including tens or hundreds of thousands of years formally in the retrograde 1:-1 co-orbital resonance. Escaping near-Earth asteroids (NEAs) are thus likely the precursors to the handful of known high-inclination objects with . We compare the production of jovian co-orbitals from escaping NEAs with those from incoming Centaurs. We find that temporary direct co-orbitals are likely dominated by Centaur capture, but we only find production of (temporary) retrograde jovian co-orbitals (including very long-lived ones) from the NEA source. We postulate that the primordial elimination of the inner Solar System's planetesimal population could provide a supply route for a metastable outer Solar System reservoir for the high-inclination Centaurs.
Accepted at AJ
References in corpus (30)
- Evidence for a Distant Giant Planet in the Solar System
- Debiased orbit and absolute-magnitude distributions for near-Earth objects
- Sedna and the Oort Cloud Around a Migrating Sun
- Retrograde resonance in the planar three-body problem
- Dynamical Chaos in the Wisdom-Holman Integrator: Origins and Solutions
- A carefully characterised and tracked Trans-Neptunian survey, the size-distribution of the Plutinos and the number of Neptunian Trojans
- The Capture of Centaurs as Trojans
- Generation of Highly Inclined Trans-Neptunian Objects by Planet Nine
- OSSOS. VIII. The Transition Between Two Size Distribution Slopes in the Scattering Disk
- A Uranian Trojan and the frequency of temporary giant-planet co-orbitals
- Asteroids in retrograde resonance with Jupiter and Saturn
- Discovery of A New Retrograde Trans-Neptunian Object: Hint of A Common Orbital Plane for Low Semi-Major Axis, High Inclination TNOs and Centaurs
- The Canada-France Ecliptic Plane Survey (CFEPS) - High Latitude Component
- Three new stable L5 Mars Trojans
- An interstellar origin for Jupiter's retrograde co-orbital asteroid
- A long-lived horseshoe companion to the Earth
- 2001 QR322: a dynamically unstable Neptune Trojan?
- That's the way the comet crumbles: Splitting Jupiter-family comets
- Asteroid 2013 ND15: Trojan companion to Venus, PHA to the Earth
- 2008 LC18: a potentially unstable Neptune Trojan
- (309239) 2007 RW10: a large temporary quasi-satellite of Neptune
- Kozai-Lidov Mechanism inside Retrograde Mean Motion Resonances
- Centaurs potentially in retrograde co-orbit resonance with Saturn
- A trio of horseshoes: past, present and future dynamical evolution of Earth co-orbital asteroids 2015 XX169, 2015 YA and 2015 YQ1
- Four temporary Neptune co-orbitals: (148975) 2001 XA255, (310071) 2010 KR59, (316179) 2010 EN65, and 2012 GX17
- From horseshoe to quasi-satellite and back again: the curious dynamics of Earth co-orbital asteroid 2015 SO2
- Asteroid 2012 XE133: a transient companion to Venus
- Trailing (L5) Neptune Trojans: 2004 KV18 and 2008 LC18
- Asteroid 2014 YX49: a large transient Trojan of Uranus
- The analemma criterion: accidental quasi-satellites are indeed true quasi-satellites