TY - JOUR
T1 - Do meteoroids originating from near-earth asteroid (25143) itokawa exist?
AU - Ohtsuka, Katsuhito
AU - Abe, Shinsuke
AU - Ito, Takashi
AU - Nakamura, Tomoki
AU - Abe, Masanao
AU - Yano, Hajime
AU - Watanabe, Jun Ichi
PY - 2011/12/25
Y1 - 2011/12/25
N2 - 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.
AB - 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.
KW - Asteroids
KW - Meteoroids
KW - Meteors
KW - Minor planets
KW - Solar system: general
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U2 - 10.1093/pasj/63.6.L73
DO - 10.1093/pasj/63.6.L73
M3 - Article
AN - SCOPUS:84855366584
SN - 0004-6264
VL - 63
SP - L73-L77
JO - Publication of the Astronomical Society of Japan
JF - Publication of the Astronomical Society of Japan
IS - 6
ER -