Premium
The August θ‐Aquillid fireballs and possible relationship with the asteroid 2004MB6
Author(s) -
Kokhirova Gulchekhra I.,
Babadzhanov Pulat B.
Publication year - 2015
Publication title -
meteoritics and planetary science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.09
H-Index - 100
eISSN - 1945-5100
pISSN - 1086-9379
DOI - 10.1111/maps.12431
Subject(s) - meteoroid , asteroid , comet , meteorite , meteor shower , astrobiology , asteroid belt , parent body , solar system , astronomy , near earth object , physics , meteor (satellite) , comet dust , geology , interplanetary dust cloud , astrophysics , chondrite
Three bright fireballs belonging to the August θ‐Aquillid ( ATA ) meteor shower were photographed by the Tajikistan fireball network in 2009. Two of them are classified as the meteorite‐dropping fireballs according to the determined parameters of the atmospheric trajectories, velocities, masses, and densities. Detection of the more dense bodies among cometary meteoroids points to a heterogeneous composition of the parent comet, and supports the suggestion that some meteorites might originate in the outer solar system, in the given case from the Jupiter‐family comet reservoir. A search for the stream's parent was undertaken among the near‐Earth asteroids ( NEA s); as a result, the asteroid 2004MB6 was identified as a possible progenitor of the ATA meteoroid stream. Investigation of the orbital evolution of the 2004MB6 and the fireball‐producing meteoroid TN 170809A showed that both objects have similar secular variations in the orbital elements during 7 kyr. The comet‐like orbit of the 2004MB6 and its association with the ATA shower suppose a cometary origin of the asteroid.