Thermal modeling for a parent body of Itokawa. (2nd August 2013)

• Record Type: Journal Article
• Authors: Wakita, S.; Nakamura, T.; Ikeda, T.; Yurimoto, H.
• Is Part Of: Meteoritics & planetary science. Volume 49:Number 2(2014:Feb.)
• Page Start: 228
• Page End: 236
• Publication Date: 2013-08-02
• Subjects: Meteorites -- Periodicals; Planetology -- Periodicals; 523.4
• DOI: 10.1111/maps.12174
• Languages: English
• ISSNs: 1086-9379

Abstract

<abstract abstract-type="main" id="maps12174-abs-0001"> <title>Abstract</title> <p>We modeled the possible parent bodies of Itokawa, which was heated within by the decay energy of ²⁶Al. 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.</p> </abstract>