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Thermal modeling for a parent body of Itokawa
Author(s) -
Wakita S.,
Nakamura T.,
Ikeda T.,
Yurimoto H.
Publication year - 2014
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.12174
Subject(s) - radius , spacecraft , astrobiology , geology , physics , astrophysics , astronomy , computer science , computer security
We modeled the possible parent bodies of Itokawa, which was heated within by the decay energy of 26 Al. Based on mineralogic studies of dust particles derived from Itokawa by the Hayabusa spacecraft, it appeared that they were thermally metamorphosed at a peak temperature of 800 °C, and kept at 700 °C or higher at 7.6 Myr after CAI formation. Our numerical results show that the parent bodies of Itokawa would have been larger than 20 km in radius and accreted at a period between 1.9 and 2.2 Myr after CAI formation, to satisfy mineralogic and isotopic evidence from dust particles.