2001 Fiscal Year Final Research Report Summary
Research for Surface Structure on Asteroids
| Project/Area Number |
10640230
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Astronomy
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| Research Institution | Kobe University |
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Principal Investigator |
MUKAI Tadashi Kobe Univ., Graduate School of Sci. & Tech., Professor, 大学院・自然科学研究科, 教授 (10097412)
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| Co-Investigator(Kenkyū-buntansha) |
NAKAMURA Ryosuke Earth Observation Research Center, NASDA, Researcher, 地球観測研究センター, 研究員 (90281732)
NAKAMURA Akiko Graduate School of Sci. & Tech, Kobe University, Associate Professor, 大学院・自然科学研究科, 助教授 (40260012)
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| Project Period (FY) |
1998 – 2001
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| Keywords | Solar System / Small bodies / Asteroids / Primitive Materials |
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| Research Abstract |
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.
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