Dynamical lifetimes of asteroids in retrograde orbits

Kankiewicz, P.; Wlodarczyk, I.

doi:10.1093/mnras/stx558

Cited by 16 publications

(16 citation statements)

References 19 publications

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“…de la Fuente Marcos & de la Fuente Marcos (2014) analyzed the dynamical evolutions of the 3 large retrograde centaurs (2008YB3, 2011MM4, and 2013. Kankiewicz & Włodarczyk (2017 studied the dynamical lifetimes of the 25 selected retrograde asteroids. They found that retrograde asteroids are generally unstable, and most of the retrograde asteroids have short life spans (<1 Myr).…”

Section: Dynamical Lifetimes Of Retrograde Asteroidsmentioning

confidence: 99%

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Survey of asteroids in retrograde mean motion resonances with planets

Huang

Gong

2019

A&A

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Aims. Asteroids in mean motion resonances (MMRs) with planets are common in the solar system. In recent years, increasingly more retrograde asteroids are discovered, several of which are identified to be in resonances with planets. We here systematically present the retrograde resonant configurations where all the asteroids are trapped with any of the eight planets and evaluate their resonant condition. We also discuss a possible production mechanism of retrograde centaurs and dynamical lifetimes of all the retrograde asteroids. Methods. We numerically integrated a swarm of clones (ten clones for each object) of all the retrograde asteroids (condition code U < 7) from −10 000 to 100 000 yr, using the MERCURY package in the model of solar system. We considered all of the p/−q resonances with eight planets where the positive integers p and q were both smaller than 16. In total, 143 retrograde resonant configurations were taken into consideration. The integration time was further extended to analyze their dynamical lifetimes and evolutions. Results. We present all the meaningful retrograde resonant configurations where p and q are both smaller than 16 are presented. Thirty-eight asteroids are found to be trapped in 50 retrograde mean motion resonances (RMMRs) with planets. Our results confirm that RMMRs with giant planets are common in retrograde asteroids. Of these, 15 asteroids are currently in retrograde resonances with planets, and 30 asteroids will be captured in 35 retrograde resonant configurations. Some particular resonant configurations such as polar resonances and co-orbital resonances are also identified. For example, Centaur 2005 TJ50 may be the first potential candidate to be currently in polar retrograde co-orbital resonance with Saturn. Moreover, 2016 FH13 is likely the first identified asteroid that will be captured in polar retrograde resonance with Uranus. Our results provide many candidates for the research of retrograde resonant dynamics and resonance capture. Dynamical lifetimes of retrograde asteroids are investigated by long-term integrations, and only ten objects survived longer than 10 Myr. We confirmed that the near-polar trans-Neptunian objects 2011 KT19 and 2008 KV42 have the longest dynamical lifetimes of the discovered retrograde asteroids. In our long-term simulations, the orbits of 12 centaurs can flip from retrograde to prograde state and back again. This flipping mechanism might be a possible explanation of the origins of retrograde centaurs. Generally, our results are also helpful for understanding the dynamical evolutions of small bodies in the solar system.

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Section: Dynamical Lifetimes Of Retrograde Asteroidsmentioning

confidence: 99%

“…Our results provide a systematic survey for the research on related topics. Kankiewicz & Włodarczyk (2017 studied dynamical lifetimes of 25 retrograde asteroids. Generally speaking, the dynamical lifetimes of the selected bodies are shorter than those of most prograde asteroids in the solar system.…”

Section: Introductionmentioning

confidence: 99%

Survey of asteroids in retrograde mean motion resonances with planets

Huang

Gong

2019

A&A

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“…Our first estimation of τ values for retrograde orbits is described in detail in Kankiewicz & Włodarczyk (2017). In this study, we found that this parameter is sensitive to relatively weak non-gravitational forces, such as the Yarkovsky effect.…”

Section: Introductionmentioning

confidence: 62%

Impact of non-gravitational effects on chaotic properties of retrograde orbits

Kankiewicz

Wlodarczyk²

2021

A&A

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Context. Dynamical studies of asteroid populations in retrograde orbits, that is with orbital inclinations greater than 90 degrees, are interesting because the origin of such orbits is still unexplained. Generally, the population of retrograde asteroids includes mostly Centaurs and transneptunian objects. A special case is the near-Earth object (343158) 2009 HC82 from the Apollo group. Another interesting object is the comet 333P/LINEAR, which for several years was considered the second retrograde object approaching Earth. Another comet in retrograde orbit, 161P Hartley/IRAS appears to be an object of similar type. Thanks to the large amount of observational data for these two comets, we tested various models of cometary non-gravitational forces applied to their dynamics. Aims. The goal was to estimate which of non-gravitational perturbations could affect the stability of retrograde bodies. In principle, we study the local stability by measuring the divergence of nearby orbits. Methods. We numerically determined Lyapunov characteristic indicators and the associated Lyapunov times (LT). This time, our calculations of these parameters were extended by more advanced models of non-gravitational perturbations (i.e. Yarkovsky drift and in selected cases cometary forces). This allowed us to estimate chaos in the Lyapunov sense. Results. We found that the Yarkovsky effect for obliquities of γ = 0° and γ = 180° can change the LT substantially. In most cases, for the prograde rotation, we received more stable solutions. Moreover, we confirmed the role of retrograde resonances in this process. Additionally, the studied cometary effects also significantly influence the long-term behaviour of the selected comets. The LT can reach values from 100 to over 1000 yr. Conclusions. All of our results indicate that the use of models with non-gravitational effects for retrograde bodies is clearly justified.

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“…This fact influenced the method we chose. Because previously (Kankiewicz & Włodarczyk 2017) we obtained relatively short dynamical lifetimes of retrograde asteroids (on the order of millions of years), these orbits can be suspected to be more chaotic than most small bodies. Our procedure for the numerical calculation of LCI was based on methods originally introduced by Benettin et al (1976), adapted and described in detail by Murray & Dermott (2000) and Sprott (2003).…”

Section: Lyapunov Times Estimationmentioning

confidence: 92%

“…1). In our recent study (Kankiewicz & Włodarczyk 2017), we analysed the dynamical lifetimes of the same asteroid group (not including 6 asteroids added later to this paper after the update of observational data). All of the objects from this list were classified as either Centaurs, TNOs, or NEAs (only one Apollotype asteroid).…”

Section: Initial Datamentioning

confidence: 99%

Impact of non-gravitational effects on chaotic properties of retrograde orbits

Kankiewicz,

Włodarczyk

2021

Preprint

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Context. Dynamical studies of asteroid populations in retrograde orbits, that is with orbital inclinations greater than 90 degrees, are interesting because the origin of such orbits is still unexplained. Generally, the population of retrograde asteroids includes mostly Centaurs and transneptunian objects (TNOs). A special case is the near-Earth object (343158) 2009 HC82 from the Apollo group. Another interesting object is the comet 333P/LINEAR, which for several years was considered the second retrograde object approaching Earth. Another comet in retrograde orbit, 161P Hartley/IRAS appears to be an object of similar type. Thanks to the large amount of observational data for these two comets, we tested various models of cometary non-gravitational forces applied to their dynamics. Aims. The goal was to estimate which of non-gravitational perturbations could affect the stability of retrograde bodies. In principle, we study the local stability by measuring the divergence of nearby orbits. Methods. We numerically determined Lyapunov characteristic indicators (LCI) and the associated Lyapunov times (LT). This time, our calculations of these parameters were extended by more advanced models of non-gravitational perturbations (i.e. Yarkovsky drift and in selected cases cometary forces). This allowed us to estimate chaos in the Lyapunov sense. Results. We found that the Yarkovsky effect for obliquities of γ = 0 • and γ = 180 • can change the LT substantially. In most cases, for the prograde rotation, we received more stable solutions. Moreover, we confirmed the role of retrograde resonances in this process. Additionally, the studied cometary effects also significantly influence the long-term behaviour of the selected comets. The LT can reach values from 100 to over 1000 years. Conclusions. All of our results indicate that the use of models with non-gravitational effects for retrograde bodies is clearly justified.

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Dynamical lifetimes of asteroids in retrograde orbits

Cited by 16 publications

References 19 publications

Survey of asteroids in retrograde mean motion resonances with planets

Survey of asteroids in retrograde mean motion resonances with planets

Impact of non-gravitational effects on chaotic properties of retrograde orbits

Impact of non-gravitational effects on chaotic properties of retrograde orbits

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