Do meteoroids originating from near-earth asteroid (25143) itokawa exist?

Katsuhito Ohtsuka, Shinsuke Abe, Takashi Ito, Tomoki Nakamura, Masanao Abe, Hajime Yano, Jun Ichi Watanabe

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Making a survey of Itokawids, i.e., meteor(oid)s originating from Apollo-type near-Earth Asteroid (25143) Itokawa, from among the multiple-station optical meteor orbit data, and employing several orbital similarity criteria, we found five Itokawid candidates. Furthermore, we classified the Itokawid candidates in meteorite types according to their physical data. The physical analyses indicate that all of the candidates evidently belong to not cometary, but asteroidal, meteoroids. Especially, the fireball, MORP 172, is the one candidate that is classified among ordinary/ carbonaceous chondrites, as against the four other at carbonaceous chondrites. Hence, the classified meteoritic matter of MORP 172 shows more similarities to Itokawa's surface composition of an LL chondrite analogue than those of the other candidates. Therefore, the fireball is considered to be the strongest of the Itokawid candidates.

Original languageEnglish
Pages (from-to)L73-L77
JournalPublications of the Astronomical Society of Japan
Volume63
Issue number6
DOIs
Publication statusPublished - 2011 Dec 25

Keywords

  • Asteroids
  • Meteoroids
  • Meteors
  • Minor planets
  • Solar system: general

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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