区分小行星的起源（16）普赛克,Space Science Reviews

小行星 (16) Psyche 可能是已分化小行星的富含金属的残余物，也可能是高度还原的、从未分化的富含金属的小行星材料。NASA Psyche 任务旨在确定 Psyche 的出处。在这里，我们描述了 Psyche 可能的太阳系起源区域，在它可能被植入小行星带之前，可以在小行星中富集金属的物理和化学过程，以及可能的陨石类似物。航天器有效载荷旨在能够区分可能的形成理论。该项目将通过测量任何强剩余磁场来确定 Psyche 的起源和形成，这意味着它是一个分化体的核心；金属与硅酸盐混合的规模将由中子能谱仪和过滤后的图像确定；金属和岩石之间的破坏程度可以通过重力与成分的相关性来确定；一些矿物学（例如，模拟的硅酸盐/金属比率，以及推断的低钙辉石或橄榄石的存在，例如）将使用过滤后的图像进行检测；并且将使用 GRNS 测量 Psyche 金属相的镍含量。

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The asteroid (16) Psyche may be the metal-rich remnant of a differentiated planetesimal, or it may be a highly reduced, metal-rich asteroidal material that never differentiated. The NASA Psyche mission aims to determine Psyche’s provenance. Here we describe the possible solar system regions of origin for Psyche, prior to its likely implantation into the asteroid belt, the physical and chemical processes that can enrich metal in an asteroid, and possible meteoritic analogs. The spacecraft payload is designed to be able to discriminate among possible formation theories. The project will determine Psyche’s origin and formation by measuring any strong remanent magnetic fields, which would imply it was the core of a differentiated body; the scale of metal to silicate mixing will be determined by both the neutron spectrometers and the filtered images; the degree of disruption between metal and rock may be determined by the correlation of gravity with composition; some mineralogy (e.g., modeled silicate/metal ratio, and inferred existence of low-calcium pyroxene or olivine, for example) will be detected using filtered images; and the nickel content of Psyche’s metal phase will be measured using the GRNS.