Water ice and organics on the surface of the asteroid 24 Themis

被引：0
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作者：
Humberto Campins
Kelsey Hargrove
Noemi Pinilla-Alonso
Ellen S. Howell
Michael S. Kelley
Javier Licandro
T. Mothé-Diniz
Y. Fernández
Julie Ziffer
机构：
[1] University of Central Florida,Department of Astrophysics
[2] PO Box 162385,Department of Physics
[3] Orlando,undefined
[4] Florida 32816-2385,undefined
[5] USA ,undefined
[6] NASA-Ames Research Center,undefined
[7] Moffett Field,undefined
[8] California 94035,undefined
[9] USA ,undefined
[10] NAIC-Arecibo Observatory,undefined
[11] University of Maryland,undefined
[12] College Park,undefined
[13] Maryland 20742,undefined
[14] USA ,undefined
[15] Instituto de Astrofísica de Canarias,undefined
[16] Calle Vía Láctea s/n,undefined
[17] E-38200 La Laguna,undefined
[18] Spain ,undefined
[19] University of La Laguna,undefined
[20] Universidade Federal Do Rio De Janeiro,undefined
[21] University of Southern Maine,undefined
[22] Portland,undefined
[23] Maine 04104,undefined
[24] USA,undefined
来源：
Nature | 2010年 / 464卷
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摘要：
Two groups, both using the NASA Infrared Telescope Facility (IRTF) on Mauna Kea in Hawaii but independently, have obtained infrared spectra of the main-belt asteroid 24 Themis consistent with the widespread presence of a frosty coating containing water ice and organics. Although the presence of water on the surface of some asteroids had been inferred from the comet-like activity of several small asteroids, these are the first actual measurements of water and organics in the asteroid belt. The presence of surface ice is particularly surprising because of the relatively short lifetime that exposed ice has at this distance from the Sun — between the orbits of Mars and Jupiter.
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页码：1320 / 1321
页数：1
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