Astronomy7 papers
Dynamics of Near Earth Objects
A curated collection of fundamental papers on the dynamics of Near-Earth Objects.
VC
Valerio Carruba
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intermediate
V‐type near‐Earth asteroids: Dynamics, close encounters and impacts with terrestrial planets
M. A. Galiazzo et al. (2017)
- Published
- Feb 10, 2017
- Journal
- Astronomische Nachrichten · Vol. 338 · No. 4
- DOI
- 10.1002/asna.201613273
At a GlanceAI
Simulations show basaltic (V-type) NEAs frequently graze Earth and can impact ~once per 12 Myr, linking to several candidate craters.
SummaryAI
This paper quantifies how often basaltic (V-type) near-Earth asteroids are expected to closely encounter and strike Venus, Earth, the Moon, and Mars, helping connect asteroid composition to planetary impact history. Using 10 Myr forward integrations with orbital “clones,” it finds V-types are commonly Earth-encountering (≈91% have <1 lunar-distance encounters) and can hit all terrestrial planets, with an Earth impact rate of ~one per 12 Myr for the observed V-type sample. Coupling encounter/impact statistics to crater scaling and hydrocode modeling, the authors narrow Earth crater candidates consistent with basaltic impactors, highlighting Nicholson and Strangways (and suggesting Ries and El’gygytgyn as plausible but unconfirmed). The results imply basaltic impactors may contribute a distinctive, potentially misclassified (comet-like Tisserand parameter) subset of hazardous impactors and offer a template for family/type-specific impact risk assessments.
Method SnapshotAI
Forward N-body integrations of observed V-type NEAs with cloned initial conditions, combined with impact/crater modeling (iSALE-2D) and crater-catalog correlation.
BackgroundAI
Comfort with near-Earth asteroid dynamics (resonances, MOID, close encounters) and basic impact/crater physics and scaling laws.
Interesting for learning about close encounters and impacts of V-type asteroids with terrestrial planets, but a bit niche.
— VC