The “Scinence”special edition on “HAYABUSA” research reports was published


The Japan Aerospace Exploration Agency (JAXA) has been engaged in collecting
and categorizing particles in the sampler container (*1), which was brought
back by the instrumental module of the asteroid exploration spacecraft
“HAYABUSA” from asteroid “Itokawa.”



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As part of this effort, JAXA has been conducting the initial analysis (*2) of
particles identified as rocky using scanning electron microscope (SEM)
observations, which were collected from sample catcher compartment “A.”

As a part of achievements of the initial analysis, six HAYABUSA research
reports were published in the “Science Magazine” dated August 26, 2011. In
addition, the cover of this magazine features these achievements.

This is also epoch-making news since the special issues that the asteroid
explorer “HAYABUSA’s” neighborhood observation on asteroid “Itokawa” in June
2006, the solar observation satellite “HINODE” in December 2007 and “KAGUYA” in
February 2009.
The titles of the research reports in Science magazine are as follows:
1) Itokawa dust particles: A direct link between S-type asteroids and ordinary
2) Oxygen Isotopic Compositions of Asteroidal Materials Returned from Itokawa
by the Hayabusa Mission
3) Neutron Activation Analysis of a Particle Returned from Asteroid Itokawa
4) Three-dimensional structure of Hayabusa sample: Origin and evolution of
Itokawa regolith
5) Incipient space weathering observed on the surface of Itokawa dust
6) Irradiation history of Itokawa regolith material deduced from noble gases in
the Hayabusa samples

*1 The HAYABUSA sampler container consists of 2 compartments that are called
Sample Catcher A and B.

*2 “Initial analysis” means the analysis of typical particles to obtain
information necessary for categorizing
(identification, classification and numbering) as a part of curation
activity (*3).

*3 “Curation activity” means the retrieval of particles, preservation,
categorizing and allocation and their necessary analysis.

Science Magazine 26 August 2011 : Cover

A small rocky particle, 150 microns in size, brought buck from asteroid
“Itokawa” by the asteroid exploration spacecraft “HAYABUSA.”

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