OSSOS. XXIII. 2013 VZ70 and the Temporary Coorbitals of the Giant Planets
Open Access
- 1 October 2021
- journal article
- research article
- Published by American Astronomical Society in The Planetary Science Journal
- Vol. 2 (5), 212
- https://doi.org/10.3847/psj/ac1c6b
Abstract
We present the discovery of 2013 VZ70, the first known horseshoe coorbital companion of Saturn. Observed by the Outer Solar System Origins Survey for 4.5 yr, the orbit of 2013 VZ70 is determined to high precision, revealing that it currently is in "horseshoe" libration with the planet. This coorbital motion will last at least thousands of years but ends ∼10 kyr from now; 2013 VZ70 is thus another example of the already-known "transient coorbital" populations of the giant planets, with this being the first known prograde example for Saturn (temporary retrograde coorbitals are known for Jupiter and Saturn). We present a theoretical steady-state model of the scattering population of trans-Neptunian origin in the giant planet region (2–34 au), including the temporary coorbital populations of the four giant planets. We expose this model to observational biases using survey simulations in order to compare the model to the real detections made by a set of well-characterized outer solar system surveys. While the observed number of coorbitals relative to the scattering population is higher than predicted, we show that the number of observed transient coorbitals of each giant planet relative to each other is consistent with a trans-Neptunian source.Funding Information
- Herzberg Astronomy and Astrophysics (PO 950297)
This publication has 58 references indexed in Scilit:
- A POSSIBLE DIVOT IN THE SIZE DISTRIBUTION OF THE KUIPER BELT'S SCATTERING OBJECTSThe Astrophysical Journal Letters, 2013
- Sedna and the Oort Cloud around a migrating SunIcarus, 2011
- Where are the Uranus Trojans?Celestial Mechanics and Dynamical Astronomy, 2010
- Stability limits for the quasi-satellite orbitMonthly Notices of the Royal Astronomical Society, 2006
- The capture of Centaurs as TrojansMonthly Notices of the Royal Astronomical Society: Letters, 2006
- The MATROS project: Stability of Uranus and Neptune Trojans. The case of 2001 QR322Astronomy & Astrophysics, 2003
- The Role of Secular Resonances in the History of TrojansIcarus, 2000
- A Study of Orbits near Saturn's Triangular Lagrangian PointsIcarus, 1996
- Studies on solar system dynamics. I - The stability of Saturnian TrojansThe Astronomical Journal, 1989
- Saturn's ring and nearby faint satellitesIcarus, 1978