The Itokawa regolith simulant IRS-1 as an S-type asteroid surface analogue
The Itokawa regolith simulant IRS-1 as an S-type asteroid surface analogue
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DOI：
10.1016/j.icarus.2019.06.011
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发表时间：
2019-11
期刊：
影响因子：
3.2
通讯作者：
Xiaojia Zeng;Xiongyao Li;D. Martin;Hong Tang;Wen Yu;Kangkang Yang;Zegui Wang;Shijie Wang
中科院分区：
文献类型：
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作者：
Xiaojia Zeng;Xiongyao Li;D. Martin;Hong Tang;Wen Yu;Kangkang Yang;Zegui Wang;Shijie Wang
小行星表面浮石模拟物(即小行星表面浮石的替代材料)对小行星着陆和(或)样品送回飞行任务的准备工作很有用。在这项研究中，我们报告了一种新的伊藤川小行星表面模拟器(称为IRS-1)，作为S类型的小行星表面模拟器，用于中国即将进行的小行星探测。IRS-1模拟剂是基于目前已有的S小行星25143伊托科瓦和LL6球粒陨石Sulagiri的矿物学数据，将具有适当粒度分布的陆地矿物混合而成的。该模拟剂的多种性质都得到了很好的表征，包括矿物学、块体化学、颗粒尺寸、密度、机械性能、反射光谱、热性能、热重和吸湿性。这些结果表明，IRS-1模拟剂具有与目标物质(即Itokowa样品和LL6球粒陨石Sulagiri)相似的矿物学、体化学和物理性质，使其成为S类型小行星的合理表面模拟物。通过对IRS-1模拟样品和另外两个制备的球粒陨石样品(L球粒陨石IRS-1L和H球粒陨石IRS-1H)的力学性能的研究，发现S小行星上的矿物学变化对S小行星球粒陨石的力学性能有较大的影响。我们的研究表明，IRS-1模拟器将适合于需要大量(几公斤到数百公斤)样本(例如，技术开发、硬件测试和钻探)的一些基于科学和工程的调查。本研究还为今后开发适用于不同类型小行星风化的小行星风化模拟器及相关应用提供了有效的生产方法。
Asteroid regolith simulants (i.e., substitute materials for asteroid surface regoliths) are useful for the preparation of asteroid landing and/or sample-return missions. In this study, we report a new Itokawa asteroid Regolith Simulant (called IRS-1) as an S-type asteroid surface analogue for China's upcoming asteroid exploration. The IRS-1 simulant was developed from mixing terrestrial minerals with appropriate particle size distributions, based on the currently available mineralogy data of S-type asteroid 25143 Itokowa and a LL6 chondrite Sulagiri. Multiple properties of this simulant are well-characterized, including mineralogy, bulk chemistry, particle size, density, mechanical properties, reflectance spectra, thermal properties, thermogravimetry, and hygroscopicity. These results demonstrate that the IRS-1 simulant has similar mineralogy, bulk chemistry, and physical properties to the target materials (i.e., Itokowa samples and LL6 chondrite Sulagiri), making this simulant a reasonable surface analogue of S-type asteroids. Based on the investigation of mechanical properties of the IRS-1 simulant and two other prepared regolith samples (i.e., L-chondrite-like IRS-1L and H-chondrite-like IRS-1H), we found that the mineralogical variations on S-type asteroids have a relatively large influence on the mechanical properties of S-type asteroid regoliths. Our studies show that the IRS-1 simulant will be appropriate for a number of scientific and engineering-based investigations where a large amount (few kilograms to hundreds of kilograms) of sample is required (e.g., technology development, hardware testing, and drilling). This study also provides an effective production approach for the future development of asteroid regolith simulants for different types of asteroid regoliths and associated applications.