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24 April 2024 |
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Discovery of A New Retrograde Trans-Neptunian Object: Hint of A Common Orbital Plane for Low Semi-Major Axis, High Inclination TNOs and Centaurs | | Ying-Tung Chen
; Hsing Wen Lin
; Matthew J. Holman
; Matthew J. Payne
; Wesley C. Fraser
; Pedro Lacerda
; Wing-Huen Ip
; Wen-Ping Chen
; Rolf-Peter Kudritzki
; Robert Jedicke
; Richard J. Wainscoat
; John L. Tonry
; Eugene A. Magnier
; Christopher Waters
; Nick Kaiser
; Shiang-Yu Wang
; Matthew Lehner
; | | Date: |
5 Aug 2016 | | Abstract: | Although the majority of Centaurs are thought to have originated in the
scattered disk, with the high-inclination members coming from the Oort cloud,
the origin of the high inclination component of trans-Neptunian objects (TNOs)
remains uncertain. We report the discovery of a retrograde TNO, which we
nickname "Niku", detected by the Pan-STARRS 1 Outer Solar System Survey. Our
numerical integrations show that the orbital dynamics of Niku are very similar
to that of 2008 KV$_{42}$ (Drac), with a half-life of $sim 500$ Myr. Comparing
similar high inclination TNOs and Centaurs ($q > 10$ AU, $a < 100$ AU and $i >
60^circ$), we find that these objects exhibit a surprising clustering of
ascending node, and occupy a common orbital plane. This orbital configuration
has high statistical significance: 3.8-$sigma$. An unknown mechanism is
required to explain the observed clustering. This discovery may provide a
pathway to investigate a possible reservoir of high-inclination objects. | | Source: | arXiv, 1608.1808 | | Services: | Forum | Review | PDF | Favorites | |
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