Mission: Hayabusa 2 |
Mission: Hayabusa 2 |
Jan 22 2008, 02:59 PM
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#901
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Junior Member Group: Members Posts: 58 Joined: 17-September 06 Member No.: 1150 |
JAXA wants to continue with Hayabusa 2. However there is/was a huge fight about the budget. Main problem was the budget for the launch vehicle. 2 months ago or so there was a report which said, that JAXA had to find another launch vehicle or the project gets cancelled. Now the Italian space agency played saviour and overed the VEGA. So finally we might see another Hayabusa in 2011.
It was mentioned here: http://www.jspec.jaxa.jp/080110Final_IPEWG-ProgramBook.pdf |
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Dec 22 2021, 12:59 AM
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#902
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Member Group: Members Posts: 437 Joined: 14-December 15 Member No.: 7860 |
Two papers on the first analyzes of Ryugu samples have been published in Nature Astronomy (open access!):
1. "Preliminary analysis of the Hayabusa2 samples returned from C-type asteroid Ryugu", by Toru Yada et al.: https://www.nature.com/articles/s41550-021-01550-6 https://www.nature.com/articles/s41550-021-01550-6.pdf 2. "First compositional analysis of Ryugu samples by the MicrOmega hyperspectral microscope", by Cedric Pilorget et al.: https://www.nature.com/articles/s41550-021-01549-z https://www.nature.com/articles/s41550-021-01549-z.pdf From abstracts: Ad 1.: „...The average of the estimated bulk densities of Ryugu sample particles is 1,282 ± 231 kg m−3, which is lower than that of meteorites, suggesting a high microporosity down to the millimetre scale, extending centimetre-scale estimates from thermal measurements. The extremely dark optical to near-infrared reflectance and spectral profile with weak absorptions at 2.7 and 3.4 μm imply a carbonaceous composition with indigenous aqueous alteration, matching the global average of Ryugu and confirming that the sample is representative of the asteroid. Together with the absence of submillimetre CAIs and chondrules, these features indicate that Ryugu is most similar to CI chondrites but has lower albedo, higher porosity and more fragile characteristics...” [Yada, T., Abe, M., Okada, T. et al. Preliminary analysis of the Hayabusa2 samples returned from C-type asteroid Ryugu. Nat Astron (2021). https://doi.org/10.1038/s41550-021-01550-6] Hi-res images of samples - https://media.springernature.com/full/sprin...ESM.jpg?as=webp Ad. 2: „...Strong features at 2.7 µm (indicating their OH-rich content) and at 3.4 µm (diagnostic of the presence of organics) dominate at a global scale, but key distinctive signatures have been identified at a submillimetre scale. In particular, carbonates (a fraction of them enriched in iron) as well as NH-rich compounds have been detected. The occurrence of volatile-rich species, likely originating from the outer Solar System, would support Ryugu having preserved both pristine material and altered phases, which are now available for refined laboratory analyses with the potential to draw new insights into the formation and evolution paths of planetary bodies in our Solar System...” [Pilorget, C., Okada, T., Hamm, V. et al. First compositional analysis of Ryugu samples by the MicrOmega hyperspectral microscope. Nat Astron (2021). https://doi.org/10.1038/s41550-021-01549-z] a few pictures: https://media.springernature.com/full/sprin...TML.png?as=webp https://media.springernature.com/full/sprin...TML.png?as=webp |
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