| Budget Amount *help |
¥15,210,000 (Direct Cost: ¥11,700,000、Indirect Cost: ¥3,510,000)
Fiscal Year 2018: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2017: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2016: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2014: ¥7,670,000 (Direct Cost: ¥5,900,000、Indirect Cost: ¥1,770,000)
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| Outline of Final Research Achievements |
This study is to construct a thermophysical model by performing the laboratory experiments and the numerical simulation for the atmosphere-free planetary surfaces covered with soil or granule regolith, and to apply the model to the analysis for thermal infrared imaging of planetary surfaces. The Japanese asteroid explorer Hayabusa2 arrived at the near-earth C-type asteroid Ryugu in June 2018, and started its remote sensing observations. The first set of high-resolved global thermal images of an asteroid has been obtained in history. The data implies that the surface materials have much lower thermal inertia than the typical carbonaceous chondrite meteorites, indicating the highly porous materials. This is completely different from our original thought, so that we started to reconstruct the thermophysical model, by considering the porosity and roughness in order to account for the brightness temperature and its diurnal profile observed by thermal infrared imager on Hayabusa2.
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