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The Tagish Lake Meteorite as a Possible Sample from a T or D Type AsteroidSince the Tagish Lake meteorite fell in January 2000, the one of the kind meteorite has become the hottest issue among meteoriticists as well as astrobiologists. Meanwhile, concerning the physical origin of the meteorite in our solar system, only Hiroi et al. reported that it likely came from a D asteroid based on comparison of their visible-near-infrared (Vis-NIR) reflectance spectra. However, because asteroid classification is usually performed based on a limited range of wavelength, the asteroid classes and surface compositions may not necessarily have one-to-one correspondence. Also, Hiroi et al. precluded the T-type asteroids simply because their average albedo is much higher than the visible reflectance of Tagish Lake although their spectral matches with Tagish Lake were good, and the 3-mm band spectra compiled in were not enough to compare the degree of hydration or kinds of hydrous minerals between primitive asteroids and Tagish Lake. In this paper, we employ more spectral datasets up to the 3-mm range to address the possible connection between two particular asteroids, 773 Irmintraud and 308 Polyxo, and the Tagish Lake meteorite.
Document ID
20030111155
Document Type
Conference Paper
Authors
Hiroi, T. (Brown Univ. Providence, RI, United States)
Kanno, A. (Tokyo Univ. Hongo, Japan)
Nakamura, R. (National Space Development Agency Tsukuba, Japan)
Abe, M. (Tokyo Univ. Japan)
Ishiguro, M. (Tokyo Univ. Japan)
Hasegawa, S. (Tokyo Univ. Japan)
Miyasaka, S. (Tokyo Metropolitan Government Tokyo, Japan)
Sekiguchi, T. (National Astronomical Observatory Tokyo, Japan)
Terada, H. (Subaru Telescope Hilo, HI, United States)
Igarashi, G. (Tokyo Univ. Hongo, Japan)
Date Acquired
August 21, 2013
Publication Date
January 1, 2003
Publication Information
Publication: Lunar and Planetary Science XXXIV
Subject Category
Lunar and Planetary Science and Exploration
Funding Number(s)
CONTRACT_GRANT: NAG5-3871
Distribution Limits
Public
Copyright
Public Use Permitted.

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