Status of the Curatorial Database System for the Ryugu Samples

M. Nishimura1, T. Yada1, M. Abe1, A. Nakato1, K. Yogata1, A. Miyazaki1, K. Kumagai2, K. Hatakeda2,T. Okada1, Y. Hitomi2, H. Soejima2, K. Nagashima1, T. Usui1, and S. Tachibana1,31
Inst. Space Astronaut. Sci. (ISAS), Japan Aerosp. Explor. Agency (JAXA), Kanagawa 252-5210, Japan(nishimura.masahiro2@jaxa.jp), Japan, 2Marine Works Japan Ltd., Yokosuka 237-0063, Japan, 3UTOPS, Grad. Sch. Sci.,Univ. Tokyo, Tokyo 113-0033

The JAXA’s Hayabusa2 spacecraft explored C-type near-Earth asteroid (162173) Ryugu and successfully returned its
reentry capsule on December 6, 2020. Particles exceeding ~5 grams in total were safely extracted from two sample chambersin the clean chamber system dedicated to Ryugu samples [1, 2]. After a six-month preliminary examination without exposure
to the air by the JAXA Astromaterials Research Group (ASRG), a part of Ryugu samples have been studied by the initial
analysis team led by the Hayabusa2 project [3]. Some samples have also been characterized by Phase-2 curation teams outside
ASRG [4]. The rest of the samples are continued to be investigated in the clean chamber to be catalogued in a curatorial
database system for Ryugu samples (Ryugu DBS), which will be archived to the community in early 2022 for theannouncement of opportunity (AO). In this presentation, we report the aim and features of the Ryugu DBS.
The Ryugu DBS has been designed and built to provide the Ryugu sample catalog with the research community andto help the researchers make the sample request through the announcement of opportunity.
The concept design of the Ryugu DBS was made in md 2019 based on lessons-learned from the operation of DBS for Itokawa
samples (Itokawa DBS) [5]. A mockup was first made to check the web interface and the user-friendliness of the system inearly 2020. The database system was then developed based on the feedback from the mockup review in Oct. 2020. The system
has been used by limited members for further feedback, major updates were made, and a supplemental system such as a data
input system was also developed. The Ryugu DBS is run using opensource technologies, such as PHP, PostgreSQL, andApache, and data servers on Data ARchives and Transmission System (DARTS) at ISAS/JAXA.
The Ryugu DBS provides the information on each individual grain (typically larger than 1 mm along the longestdimension) and on aggregate samples. Because of the presence of large amount of fine particles (relative to Itokawa particles),fine grains are planned to be examined as an aggregate sample put in a single dish. The basic information listed in the DBS
includes photomicrographs, weight, size, and spectroscopic data, all of which are obtained in the clean chamber system
without exposure to the air. The spectroscopic data can be downloaded with the CSV format. Along with such basic
information, the analysis history and data obtained in previous analysis can also be found for each sample. The data obtainedby the project-led initial analysis and that from curation work outside JAXA will also be archived in the future.
The release of the Ryugu DBS to the community will be in early 2022.
References[1] Tachibana S. et al. (2021) LPS, XXXXXII, Abstract #1289. [2] Yada T. et al. (2021) LPS, XXXXXII, Abstract #2008. [3]Tachibana S. et al. (2021) submitting for Hayabusa 2021 symposium. [4] Ito M. et al. (2021) submitting for Hayabusa 2021
symposium. [5] Uesugi M et al. (2016) Journal of Space Science Informatics Japan: Vol 5, 59-70.

Fig. 1. The interface of the Ryugu DBS.