THE IMPACT EJECTA ENVIRONMENT of NEAR EARTH ASTEROIDS

Jamey R. Szalay, Mih�ly Hor�nyi

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

Impact ejecta production is a ubiquitous process that occurs on all airless bodies throughout the solar system. Unlike the Moon, which retains a large fraction of its ejecta, asteroids primarily shed their ejecta into the interplanetary dust population. These grains carry valuable information about the chemical compositions of their parent bodies that can be measured via in situ dust detection. Here, we use recent Lunar Atmosphere and Dust Environment Explorer/Lunar Dust Experiment measurements of the lunar dust cloud to calculate the dust ejecta distribution for any airless body near 1 au. We expect this dust distribution to be highly asymmetric, due to non-isotropic impacting fluxes. We predict that flybys near these asteroids would collect many times more dust impacts by transiting the apex side of the body compared to its anti-apex side. While these results are valid for bodies at 1 au, they can be used to qualitatively infer the ejecta environment for all solar-orbiting airless bodies.

Original languageEnglish (US)
Article numberL29
JournalAstrophysical Journal Letters
Volume830
Issue number2
DOIs
StatePublished - Oct 20 2016
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • meteorites, meteors, meteoroids
  • minor planets, asteroids: general
  • zodiacal dust

Fingerprint

Dive into the research topics of 'THE IMPACT EJECTA ENVIRONMENT of NEAR EARTH ASTEROIDS'. Together they form a unique fingerprint.

Cite this