| Project/Area Number |
25287114
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Solid earth and planetary physics
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| Research Institution | The University of Aizu |
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Principal Investigator |
Hirata Naru 会津大学, コンピュータ理工学部, 上級准教授 (80372655)
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| Co-Investigator(Kenkyū-buntansha) |
DEMURA Hirohide 会津大学, コンピュータ理工学部, 教授 (10360009)
SUGITA Seiji 東京大学, 理学研究科, 教授 (80313203)
NARUSE Keitarou 会津大学, コンピュータ理工学部, 上級准教授 (10301938)
OHTA Naoya 群馬大学, 理工学研究院, 教授 (10270860)
TAKAHASHI Shigeo 会津大学, コンピュータ理工学部, 教授 (40292619)
YAGUCHI Yuichi 会津大学, コンピュータ理工学部, 准教授 (00609109)
ISHIKAWA Hiroshi 早稲田大学, 理工学術院, 教授 (60381901)
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| Co-Investigator(Renkei-kenkyūsha) |
OGAWA Naoko 独立行政法人宇宙航空研究開発機構, 宇宙探査イノベーションハブ, 研究員 (10523813)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥12,350,000 (Direct Cost: ¥9,500,000、Indirect Cost: ¥2,850,000)
Fiscal Year 2015: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2014: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2013: ¥7,410,000 (Direct Cost: ¥5,700,000、Indirect Cost: ¥1,710,000)
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| Keywords | 小惑星 / 形状モデル / 3次元地理情報システム / Stereo photoclinometry / Structure-from-Motion / 衝突現象 / 重力ポテンシャル分布 / Shape-from-Shading / Photometric stereo / ボクセルベース形状復元 |
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| Outline of Final Research Achievements |
We developed a method for high resolution 3D shape reconstruction of asteroids with a combination of SPC and SfM methods and a 3D geographical information system for asteroid data analysis. By utilizing these research environment, we analyzed image data of the asteroid Itokawa taken by the Hayabusa spacecraft to reveal new views on a small rubble-pile asteroid. We describe a resurfacing history of Itokawa by impact events. It is suggested that Itokawa was suffered by a global resurfacing event on several Myr ago, which is consistent with evidence from samples recovered from Itokawa.
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