Research for Surface Structure on Asteroids

小行星表面结构研究

• 批准号: 10640230
• 负责人: MUKAI Tadashi
• 金额: $ 1.15万
• 依托单位: Kobe University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10640230/
• 关键词: Solar System; Small bodies; Asteroids; Primitive Materials

1. Photopolarimetric observations of main belt asteroids by using the multi-channel polarizer in Dodaira Observatory(1998-99) and HBS in Okayama Astronomical Observatory(2000-01) have been done. A phase angle dependence of polarization, as well as a time variation of polarization and brightness along the rotation of asteroid, are observed. As a result, the existence of surface inhomogeneous albedo distribution on the asteroid has been found for 9 Metis and 3 Juno.2. Laboratory measurements of light scattering by regolith-like materials have been performed. A dependence of scattered light intensity and polarization on the physical properties of regolith-like sample grains is derived for many different kind of sample materials.3. Laboratory measurements, especially polarization measurements, will be continued, and the data base of different regolith-like materials will be completed. The results will be applied to analyse the in-situ data expected in MUSES-C sample return mission to the asteroid.

1. 利用多通道偏光镜和冈山天文台HBS（2000-01）对主带小行星进行了光偏振观测。观测到偏振的相位角依赖性，以及偏振和亮度随小行星自转的时间变化。结果发现，9 Metis和3 june 2小行星表面反照率分布不均匀。对类风化层材料的光散射进行了实验室测量。对于许多不同种类的样品材料，导出了散射光强度和偏振对类风化层样品颗粒物理性质的依赖关系。实验室测量，特别是极化测量，将继续进行，并将完成不同类风化层材料的数据库。该结果将用于分析muse - c样品返回小行星的原位数据。

项目成果

R. Nakamura: "Optical properties of fluffy aggregates as analogue of interplanetary dust particles"Adv. Space Res.. 23. 1209-1212 (1999)

R. Nakamura：“蓬松聚集体的光学特性作为行星际尘埃粒子的类似物”Adv。

Kamei, A.: "Laboratory study of bidirectional reflectance of powdered surfaces : On the asymmetry parameter of asteroid photometric data"Icarus. (In press). (2002)

Kamei, A.：“粉末表面双向反射率的实验室研究：小行星光度数据的不对称参数”伊卡洛斯。

Mukai, T.: "Detection of mass, shape and surface roughness of target asteroid of MUSES-C by LIDAR"Adv. Space Res.. (In press). (2002)

Mukai, T.：“利用激光雷达检测 MUSES-C 目标小行星的质量、形状和表面粗糙度”Adv.

R.Nakamura: "The discovery of a faint glow of scattered sunlight from the dust trail of the Leonid parent comet 55P/Tempel-Tuttle"Ap.J.. 540. 1172-1176 (2000)

R.Nakamura：“从狮子座母彗星 55P/Tempel-Tuttle 的尘埃轨迹中发现了散射阳光的微弱光芒”Ap.J. 540. 1172-1176 (2000)

A.Kamei: "Laboratory study of bidirectional reflectance of powdered surfaces : On the asymmetry parameter of asteroid photometric data"Icarus. (In press). (2002)

A.Kamei：“粉末表面双向反射率的实验室研究：小行星光度数据的不对称参数”伊卡洛斯。