Do Meteoroids Originating from Near-Earth Asteroid (25143) Itokawa Exist?

被引：2

作者：

Ohtsuka, Katsuhito ^{[1
]}

Abe, Shinsuke ^{[3
]}

Ito, Takashi ^{[2
]}

Nakamura, Tomoki ^{[4
]}

Abe, Masanao ^{[5
]}

Yano, Hajime ^{[5
]}

Watanabe, Jun-ichi ^{[2
]}

机构：

[1] Tokyo Meteor Network, Setagaya Ku, Tokyo 1550032, Japan

[2] Natl Inst Nat Sci, Natl Astron Observ Japan, Mitaka, Tokyo 1818588, Japan

[3] Natl Cent Univ, Inst Astron, Tao Yuan 32001, Taiwan

[4] Tohoku Univ, Fac Sci, Dept Earth & Planetary Mat Sci, Aoba Ku, Sendai, Miyagi 9808578, Japan

[5] JAXA, Inst Space & Astronaut Sci, Chuo Ku, Sagamihara, Kanagawa 2298510, Japan

来源：

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN | 2011年 / 63卷 / 06期

关键词：

meteors; meteoroids; minor planets; asteroids; solar system: general; C MISSION TARGET; APOLLO ASTEROIDS; 3200; PHAETHON; 1998; SF36; CHONDRITE; METEORITE; STREAM; ORBIT; IDENTIFICATION; HAYABUSA;

D O I：

10.1093/pasj/63.6.L73

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Making a survey of Itokawids, i.e., meteor(oid)s originating from Apollo-type near-Earth Asteroid (25143) ltokawa, 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.

引用

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页码：L73 / L77

页数：5

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