Identification of water ice on the Centaur 1997 CU26

被引:45
作者
Brown, RH [1 ]
Cruikshank, DP
Pendleton, Y
Veeder, GJ
机构
[1] Univ Arizona, Lunar & Planetary Lab, Tucson, AZ 85721 USA
[2] Univ Arizona, Steward Observ, Tucson, AZ 85721 USA
[3] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA
[4] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA
关键词
D O I
10.1126/science.280.5368.1430
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Spectra of the Centaur 1997 CU26 were obtained at the Keck Observatory on 27 October 1997 (universal time). The data show strong absorptions at 1.52 and 2.03 micrometers attributable to water ice on the surface of 1997 CU26. The reflectance spectrum of 1997 CU26 is matched by the spectrum of a mixture of low-temperature particulate water ice and spectrally featureless but otherwise red-colored material. Water ice dominates the Spectrum of 1997 CU26, whereas methane or methane-like hydrocarbons apparently dominate the spectrum of the Kuiper belt object 1993 SC, perhaps indicating different origins, thermal histories, or both for these two objects.
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页码:1430 / 1432
页数:3
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