Compositional differences between meteorites and near-Earth asteroids

被引：0

作者：

P. Vernazza

R. P. Binzel

C. A. Thomas

F. E. DeMeo

S. J. Bus

A. S. Rivkin

A. T. Tokunaga

机构：

[1] European Space Agency,Research and Scientific Support Department

[2] Keplerlaan 1,Department of Earth

[3] 2201 AZ Noordwijk,undefined

[4] The Netherlands,undefined

[5] Atmospheric,undefined

[6] and Planetary Sciences,undefined

[7] Massachusetts Institute of Technology,undefined

[8] Cambridge,undefined

[9] Massachusetts 02139,undefined

[10] USA,undefined

[11] Laboratoire d’Etudes Spatiales et d’Instrumentation en Astrophysique,undefined

[12] Observatoire de Paris,undefined

[13] 5 Place Jules Janssen,undefined

[14] Meudon,undefined

[15] F-92195,undefined

[16] France ,undefined

[17] Institute for Astronomy,undefined

[18] University of Hawaii,undefined

[19] 640 North A’ohoku Place,undefined

[20] Hilo,undefined

[21] Hawaii 96720,undefined

[22] USA ,undefined

[23] Johns Hopkins University Applied Physics Laboratory,undefined

[24] 11100 Johns Hopkins Road,undefined

[25] Laurel,undefined

[26] Maryland 20723,undefined

[27] USA ,undefined

[28] Institute for Astronomy,undefined

[29] University of Hawaii,undefined

[30] 2680 Woodlawn Drive,undefined

[31] Honolulu,undefined

[32] Hawaii 96822,undefined

[33] USA ,undefined

来源：

Nature | 2008年 / 454卷

关键词：

D O I：

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中图分类号：

学科分类号：

摘要：

New spectral measurements of near-Earth asteroids reveal, as might be expected, overall compositions similar to the most commonly falling meteorites, the ordinary chondrites. But the compositional distribution is un-expected: about two-thirds of near-Earth asteroids, including those most likely to hit us, match the class of meteorites known as LL chondrites, which comprise only about 8% of all meteorite falls. This may reflect an origin at the asteroid belt's inner edge, where the family of asteroids produced by the break-up of the Flora parent body predominates. A possible explanation might lie in the involvement of size-dependent processes in the transport of material from the main asteroid belt to the vicinity of Earth's orbit.

引用

页码：858 / 860

页数：2

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