route
resonance
distance
Dynamical Evolution of Neas: Close Encounters, Secular Perturbations and Resonances
evolution
encounters
planet-crossing orbits
integration
perturbations
secular perturbations
conservation
NEA
invariants
integration Jupiter
resonant states
Near-Earth Asteroids
interplay
Earth
semimajor axis
chapters
approximate conservation
dynamical routes
2022-01-01T19:23
dynamical evolution
https://scigraph.springernature.com/explorer/license/
perihelion distance
Jupiter
state
complex interplay
151-164
en
different resonant states
random walk
numerical integration
main mechanism
walk
NEA (4179) Toutatis
eccentricity
1996
results
first integration
Toutatis
evolution patterns
We discuss the main mechanisms affecting the dynamical evolution of Near- Earth Asteroids (NEAs) by analyzing the results of three numerical integrations over 1 Myr of the NEA (4179) Toutatis. In the first integration the only perturbing planet is the Earth. So the evolution is dominated by close encounters and looks like a random walk in semimajor axis and a correlated random walk in eccentricity, keeping almost constant the perihelion distance and the Tisserand invariant. In the second integration Jupiter and Saturn are present instead of the Earth, and the 3/1 (mean motion) and (secular) resonances substantially change the eccentricity but not the semimajor axis. The third, most realistic, integration including all the three planets together shows a complex interplay of effects, with close encounters switching the orbit between different resonant states and no approximate conservation of the Tisserand invariant. This shows that simplified 3-body or 4-body models cannot be used to predict the typical evolution patterns and time scales of NEAs, and in particular that resonances provide some “fast-track” dynamical routes from low-eccentricity to very eccentric, planet-crossing orbits.
Tisserand invariant
close encounters
typical evolution patterns
mechanism
time scales
asteroids
false
planets
orbit
axis
Saturn
scale
model
1996-01-01
https://doi.org/10.1007/978-94-009-0209-1_20
second integration Jupiter
Myr
effect
chapter
patterns
978-94-009-0209-1
Worlds in Interaction: Small Bodies and Planets of the Solar System
978-94-010-6578-8
Geology
Paolo
Farinella
pub.1009092644
dimensions_id
Valtonen
M. J.
Christiane
Froeschlé
Michel
Patrick
Earth Sciences
Springer Nature
10.1007/978-94-009-0209-1_20
doi
Springer Nature - SN SciGraph project
Dept. Cassini, Observatoire de la Côte d’Azur, B.P. 229, 06304, Nice Cedex 4, France
Dept. Cassini, Observatoire de la Côte d’Azur, B.P. 229, 06304, Nice Cedex 4, France
Rickman
H.