MUSES-C target asteroid (25143) 1998 SF36: A reddened ordinary chondrite

被引：127

作者：

Binzel, RP

Rivkin, AS

Bus, SJ

Sunshine, JM

Burbine, TH

机构：

[1] MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA 02139 USA

[2] Inst Astron, Hilo, HI 96720 USA

[3] Sci Applicat Int Corp, Adv Technol Applicat Div, Chantilly, VA USA

[4] Natl Museum Nat Hist, Smithsonian Inst, Dept Mineral Sci, Washington, DC 20560 USA

来源：

METEORITICS & PLANETARY SCIENCE | 2001年 / 36卷 / 08期

关键词：

D O I：

10.1111/j.1945-5100.2001.tb01950.x

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Near-Earth asteroid (25143) 1998 SF36 is a planned target for the Japanese MUSES-C sample return mission. High signal-to-noise and relatively high-resolution (50 Angstrom) visible and near-infrared spectroscopic measurements obtained during this asteroid's favorable 2001 apparition reveal it to have a red-sloped S(IV)-type spectrum with strong 1 and 2 mum absorption bands analogous to those measured for ordinary chondrite meteorites. This red slope, which is the primary spectral difference between (25143) 1998 SF36 and ordinary chondrite meteorites, is well modeled by the spectrum of 0.05% nanophase iron (npFe(0)) proposed as a weathering mechanism by Pieters et al. (2000). Asteroid 1998 SF36 appears to have a surface composition corresponding to that of ordinary chondrite meteorites and is most similar in spectral characteristics and modeled olivine/pyroxene content to the LL chondrite class.

引用

页码：1167 / 1172

页数：6