Astronomy7 papers
Dynamics of Near Earth Objects
A curated collection of fundamental papers on the dynamics of Near-Earth Objects.
VC
Valerio Carruba
All Reviews
AstronomyWorth Reading
intermediate
Origin and dynamics of Near Earth Objects
Patrick Michel et al. (2005)
- Published
- Feb 19, 2005
- Journal
- Comptes Rendus. Physique · Vol. 6 · No. 3
- DOI
- 10.1016/j.crhy.2004.12.013
At a GlanceAI
A dynamical steady-state model links NEO orbits to asteroid-belt resonances, highlighting Yarkovsky drift as the key resupply mechanism.
SummaryAI
This paper synthesizes how near-Earth objects are continuously supplied from the asteroid belt and evolve through chaotic resonances and planetary encounters, enabling a steady-state description of the NEO population. Using large ensembles of numerical integrations plus survey-bias calibration, it builds a debiased orbital–magnitude distribution and estimates ~1000 NEOs larger than 1 km, with ~0.5 Myr mean Earth impact interval for km-class bodies. A central advance is arguing that Yarkovsky (and YORP) thermal forces, not direct collisional injection, dominate delivery into key source resonances, naturally explaining the comparatively shallow NEO size distribution. The implications are improved impact-hazard quantification and clearer prioritization of search strategies (e.g., small but high-risk subpopulations like Atens/IEOs).
Method SnapshotAI
Massive long-term N-body integrations of test particles from candidate source regions, combined into a steady-state residence-time model and calibrated against survey selection biases.
BackgroundAI
Background in Solar System small-body dynamics (resonances, chaotic diffusion, close encounters) and basic observational-bias concepts for asteroid surveys.
A dynamical steady-state model links NEO orbits to asteroid-belt resonances, highlighting Yarkovsky drift as the key resupply mechanism. A bit outdated.
— VC