Are two of the Neptune Trojans dynamically unstable?

Horner, Jonathan and Lykawka, Patryk Sofia (2012) Are two of the Neptune Trojans dynamically unstable? In: 11th Australian Space Science Conference (ASSC 2011), 26-29 Sept 2011, Sydney, Australia.

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Abstract

The Neptune Trojans are the most recently discovered population of small bodies in the Solar System. To date, only eight have been discovered, though it is thought likely that the total population at least rivals that of the asteroid belt. Their origin is still the subject of
some debate. Here, we detail the results of dynamical studies of two Neptune Trojans, 2001 QR322 and 2008 LC18. We find that both objects lie very close to boundaries between dynamically stable and unstable regions, with a significant probability that either or both of
the objects are actually unstable on timescales of a few hundred million years. Such instability supports the idea that at least these two Neptune Trojans are dynamically captured objects, rather than objects that formed in situ. This does not, however, rule out the possibility that
these two objects were captured during Neptune’s proposed post-formation migration, and have remained as Trojans ever since.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: Copyright © 2012 National Space Society of Australia Ltd. No evidence of copyright restrictions preventing deposit of Accepted version.
Faculty / Department / School: No Faculty
Date Deposited: 09 Aug 2017 05:23
Last Modified: 15 Aug 2017 03:10
Uncontrolled Keywords: Neptune Trojans, solar system formation, solar system evolution, centaurs, comets, dynamical methods
Fields of Research : 02 Physical Sciences > 0201 Astronomical and Space Sciences > 020110 Stellar Astronomy and Planetary Systems
URI: http://eprints.usq.edu.au/id/eprint/32753

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