Mission: Hayabusa 2 Options

[Wez]

I was going to post up the highlighted map but I'll wait until I can work out how to upload something in the post properly.

I have added my original map to the Shape File from SBMT which you can view here: Ryugu 3D Model

I'm keen to get access to other data to add to this:

• Colour Topography (Phil did you create this or did you get it from JAXA?)
• Thermal map in Cylindrical projection
• Gravity Map in Cylindrical projection

[Wez]

A third thing is creating my own reconstruction photogrammically from the raw images from the ONC-T camera (I presume that is the best camera). I presume there are more images than the set from Romans animated GIF at 6pm which could be used for a reconstruction.

Does anyone have contacts in JAXA who I could talk to about acquiring the raw data images to use? I'm hoping to make a better map and then create another Cylindrical map from that which is high detail and covers the entire asteroid.


In addition I have also create an Interactive version of Ryugu in an Asteroid Viewer app I'm developing with the ability to fade between maps and fade labels in and out with a scale bar. Eventually I'll plan to move that tool to be online and I'll post up a link here when that is finalised.

Thanks for any assistance

I should pass on a thankyou to everyone in this sub-forum as well. The amount of useful information in these pages has been fantastic

[Marcin600]

"...The largest particle that JAXA's spacecraft Hayabusa2 brought back from the asteroid Ryugu was over 10 mm in major diameter (other particles are mainly less than several mm in size), which was beyond even the expectations..." - https://curation.isas.jaxa.jp/en/topics/21-09-10.html (includes video)

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[Marcin600]

"Some Ryugu samples were distributed to NASA on Nov. 30th. (...) Usui, Manager of ASRG, carried samples to the Johnson Space Center of NASA and passed them to curatorial staff." - https://curation.isas.jaxa.jp/en/topics/21-12-07.html

Edit:
https://www.nasa.gov/feature/nasa-receives-...mple-from-japan

Edit: some other samples of Ryugu currently outside of Japan:
at the Carnegie Earth and Planets Laboratory (EPL), USA - arrived in mid-August 2021
https://epl.carnegiescience.edu/news/ryugu-...s-arrive-campus (with picture)

at Brown University, USA - arrived at the end of September 2021
https://scitechdaily.com/asteroid-ryugu-sam...-close-up-look/ (with picture)

at Institut d'Astrophysique Spatiale (IAS), France - arrived in July 2021
https://www.ias.u-psud.fr/en/content/ias-an...-ryugu-asteroid (with picture)

at NASA - arrived in June 2021
https://www.nasa.gov/image-feature/a-sample...-asteroid-ryugu (with picture)

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[Marcin600]

"You can currently see grains from asteroid Ryugu that were brought back by Hayabusa2 at the Miraiakan National Museum of Emerging Science and Innovation and at the Sagamihara City Museum" [both in Japan]
https://twitter.com/haya2e_jaxa/status/1467826224013934592
https://www.miraikan.jst.go.jp/en/news/gene...2111102216.html

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[TrappistPlanets]

I was going to post up the highlighted map but I'll wait until I can work out how to upload something in the post properly.

I have added my original map to the Shape File from SBMT which you can view here: Ryugu 3D Model

I'm keen to get access to other data to add to this:

• Colour Topography (Phil did you create this or did you get it from JAXA?)
• Thermal map in Cylindrical projection
• Gravity Map in Cylindrical projection

is it possible to download the shape mesh and Texture, i can't find any download options anywhere (even after logging into my scetchfab account)

[Marcin600]

If you'd like to get Ryugu samples for testing - ASRG calls for proposals... For the first announcement of opportunity ~50 particles will be available:
https://curation.isas.jaxa.jp/en/topics/21-12-17.html
https://jaxa-ryugu-sample-ao.net/

[Marcin600]

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

[Marcin600]

Material from December press conference: report from the curation team, current status of spacecraft operations and details on the public display of the Ryugu samples
https://www.hayabusa2.jaxa.jp/en/enjoy/mate...06_ver6_en2.pdf
Credit: JAXA

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[Marcin600]

The Ryugu samples catalogue - database (with pictures) is now open:
https://darts.isas.jaxa.jp/curation/hayabusa2/



The bigest particle - C9000, from chamber C, size: 10.345 mm, weight: 138.1 mg
Credit: ISAS/JAXA https://darts.isas.jaxa.jp/curation/hayabus...p?sample_id=702

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[Marcin600]

The famous "alien fragment" - most likely a metal scrap scratched from the sample horn (SMP) by fired bullet (sample C0110, from chamber C, size: 7.583 mm, weight: 4.0 mg)

Credit: ISAS/JAXA https://darts.isas.jaxa.jp/curation/hayabus...p?sample_id=845

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[Marcin600]

Some other interesting particles and an example of "elevation map" of one of the particles

Credit: ISAS/JAXA https://darts.isas.jaxa.jp/curation/hayabusa2/

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[Explorer1]

It's great to see JAXA provide a chance to view then in such an open format!

The 'glitter' effect certainly gives them an otherworldly property. The colours are just camera artifacts from the light reflecting, right? (to the extent that any light reflects off such dark materials!)

[Marcin600]

It's great to see JAXA provide a chance to view then in such an open format!

The 'glitter' effect certainly gives them an otherworldly property. The colours are just camera artifacts from the light reflecting, right? (to the extent that any light reflects off such dark materials!)

I also think they are amazingly beautiful and very much from different world - the most alien we currently possess! (from the unprocessed by the Earth's atmosphere - I mean not counting the meteorites).

As for the colors, we have to remember that these are micrographs - these particles are actually tiny, and there is a lot of "color noise" - an artifact from the way the camera's color CCD image sensor works. This is clearly visible on the background surface next to the particles - especially in the shade. Therefore, at the smallest scale, the light points on the samples have „artificial” colors. These particles are almost monochromatic (like e.g. most lunar rocks) - almost black with lighter minerals (grayish white spots). But it seems to me that in general, on a larger scale, you can notice a slightly brownish shade - even slightly yellowish or reddish in places. Some places of the samples also seem to fall more into cool colors - grayish-bluish. But it might just be my subjective impression, an artifact resulting from lighting conditions or image compression! Only the spectra are objective

Below: fragment of the original photograph with the background in shadow, and next to it with color saturated by me - the pattern of colors in a shaded background reflects the CCD sensor, I think.

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[Holder of the Tw...]

I'm pretty sure - someone please correct if I'm wrong - that what we are seeing here is stuff that never would have made it through earth's atmosphere in any form other than a little bit of roasted dust. In other words, too fragile to have ever made it into any meteorite collection.