Asteroid explorer, Hayabusa2,reporter briefing
December 6, 2021
JAXA Hayabusa2 Project
ISAS Astromaterials Science Research GroupOverview & Table of Contents
Overview•

Report on curation activities and future plans–––•2021/6: samples distributed to the sample analysis teams. The analysis is proceeding as planned, andthe results are set to be reported next spring.
2021/11/30 CST: 10% of the sample collected from Ryugu were distributed to NASA under theMemorandum of Understanding (MOU) between NASA & JAXA.
Early spring 2022︓sample catalogue will be available to the public in preparation for theinternational open call in summer 2022.

Spacecraft operation status–Continuation of the Extended Mission.

Contents

0．Celebrating the 1st anniversary of the return to Earth (Y. Tsuda)
1. Report from the curation team (T. Usui)
2. Status of spacecraft operations（M. Yoshikawa）
3. Ryugu sample public release（M. Yoshikawa）
2021/12/6

Hayabusa2 reporter briefing

2

1．Curation activity status and future plans
Analysis of the samples distributed in June is proceeding as planned, and the results are set to be reported next spring.
2020/12Phase 2 4%

Phase2: overseas 2%

NASA 10%

International AO
15%

Future storage
60%

Outreach 1%

2022/6

Preparation of international opportunities,
preparation of sample catalogue

Total sample︓~5.4 g• Chamber A︓3.2 g• Chamber B︓<0.1 g• Chamber C︓2.0 g• Other︓~0.2 g
Sample distribution in June
Initial analysis︓~0.3 g
Phase 2︓~0.2 g*All distribution is by weight ％（credit：JAXA）
2021/12/06

JAXA detailed description 2%

2021/12Curation work: initial description of theindividual samples

Initialanalysis 6%

2021/6

Phase1: Understanding the overall appearance of the sample, initialdescription of the first distributed sample(within 6 months of return）

Hayabusa2 reporter briefing

31．Curation activity status and future plans
Based on the agreement between NASA and JAXA, 10% of the Ryugu sample has been distributed to NASA.
2020/12Phase 2 4%

Phase2: overseas 2%

NASA 10%

International AO
15%

Future storage
60%

Outreach 1%

2022/6

Preparation of international opportunities,
preparation of sample catalogue

Total sample︓~5.4 g• Chamber A︓3.2 g• Chamber B︓<0.1 g• Chamber C︓2.0 g• Other︓~0.2 gSample distribution to NASA• 0.5 g＊Approx. 0.25g from each ofchambers A & C.
＊Includes particle/powdersample*All distribution is by weight ％（credit：JAXA）
2021/12/06

JAXA detailed description 2%

2021/12Curation work: initial description of theindividual samples

Initialanalysis 6%

2021/6

Phase1: Understanding the overall appearance of the sample, initialdescription of the first distributed sample(within 6 months of return）

Hayabusa2 reporter briefing

41．Curation activity status and future plans
The NASA-JAXA inter-institutional agreement︓１）Distribute 10% (weight ratio) of the recovered sample one year after returning.
２）The distributed sample should be “representativeness” of the recovered sample.
３）The distributed sample must be “unprocessed” (preserved in original state).
Examples of representativeness• Particle/power ratio (~2:3)• Taken from both chambers A & C

Microscope image of the recovered sample (left: chamber A, right:chamber C). Container diameter: 21 mm.
2021/12/6

Examples of unprocessed• No contact with atmosphere.
• No damage to the sample during examination(X-rays, UV or electron beams have not beenused).
• No pollution from the environment during
examination (contamination control).
• Used only approved procedures / equipment
during examination.

Hayabusa2 reporter briefing（credit：JAXA）

5

1．Curation activity status and future plans
11/30 CST: completed transfer from JAXA to the NASA Johnson Space Center.

In the NASA clean room, NASA & JAXA members performed (left) removal of the sample from the sample container and (right) confirmationof the contents.
2021/12/6

Hayabusa2 reporter briefing（credit：NASA/JAXA）

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1．Curation activity status and future plans
On 11/30 CST, a confirmation ceremony for the sample delivery was held at the NASA
Johnson Space Center.

Signatures of the NASA and JAXA curators.
Group photo of NASA/JAXA members who participated in the delivery ceremony
2021/12/6

Hayabusa2 reporter briefing（credit：NASA/JAXA）

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1．Curation activity status and future plans
Based on the agreement between NASA and JAXA, 10% of the Ryugu sample has been distributed to NASA.
2020/12Phase 2 4%

Phase2: overseas 2%

NASA 10%

International AO
15%

Future storage
60%

Outreach 1%

2022/6

Preparation of international opportunities,
preparation of sample catalogue• International call for research
proposals• Research proposals will beevaluated by a panel selected fromexperts in Japan and abroad.
• Proposals and distribution ofsamples will be determined basedon this evaluation.
• Distribution will begin after
approval by the Hayabusa2 Sample
Allocation Committee.
*All distribution is by weight ％（credit：JAXA）
2021/12/06

JAXA detailed description 2%

2021/12Curation work: initial description of theindividual samples

Initialanalysis 6%

2021/6

Phase1: Understanding the overall appearance of the sample, initialdescription of the first distributed sample(within 6 months of return）

Hayabusa2 reporter briefing

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1．Curation activity status and future plans
The sample catalogue will be open to the public from mid-January(scheduled), in preparation for the international open call in summer 2022.

Image of sample catalogue
2021/12/6

Hayabusa2 reporter briefing（credit：JAXA）

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1．Curation activity status and future plans
Samples released for public viewing in December 2021
Loaned to the National Museum of Emerging Science and Innovation

Loaned to the Sagamihara City Museum

A0116：
Chamber A sample（1st TD）
Major axis 2.2mmWeight 2mg

C0124：
Chamber C sample (2nd TD)
Major axis 2.1mm
Weight 2mg

A0161：
Chamber A sample (1st TD)
Major axis 2.2mm
Weight 2mg

C0149：
Chamber C sample (2nd TD)
Major axis 2.1mm
Weight 2mg

For the information on the public release, refer to (3): Ryugu sample public release2021/12/6

Hayabusa2 reporter briefing（credit：JAXA）

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2．Spacecraft operation status• Ongoing Extended Mission operation（operation
has continued for one year after returning to theEarth)• Flight status is shown in the table on the right.
• In scientific observations, observations of thezodiacal light have been carried out six times
since returning to the Earth and the data is being
analysed. (Another observation is scheduled fortoday.)
Reference• IAF World Space Award
2021/12/6

Spacecraft flight status on 2021/12/06
Item

Value

Days since launch

2560

Total flight distance sincelaunch~6,246 million km

Earth-spacecraft distance(round trip propagation time)~100 million km（~668s）

Sun-spacecraft distance~130 million km（~0.87au）

Velocity relative to Sun~32.8km/s

Acceleration by ion engines
since Earth return~470m/sHayabusa2 reporter briefing

11Reference：Ion engine operating status
Since 2021/01, four ion engines have been in operation for a cumulative total of7138 hours, and are scheduled to operate until the end of December. On
October 23, 2021, this surpassed Hayabusa’s impulse of 0.9474 MN s(meganewton-second) and this record will be broken every day from now.
Ion engine B is currently operating at near maximum specific impulse to savefuel. 40.5 kg of Xe has been consumed and 25.5 kg remains.
Table: Cumulative results of ion engines A, B, C, and D andcomparison with HayabusaABCD
End of 2020, time operated

6637

1180517453

9423

End of Nov. 2021, time operated

6997

4129

92218943

13884

71280911989

14830 25590)

360

4118

1170

1490

4461

Cumulative impulse, MNs

0.236

0.124

0.308

0.301

0.968

(Hayabusa impulse, MNs

0.0001

0.322

0.264

0.3610.947)(Hayabusa, time operated
Extended mission, time operated（credit：JAXA）
2021/12/6

IES

Hayabusa2 reporter briefing

123．Ryugu sample public release〇 National Museum of Emerging Science and Innovation• Sample return capsule, Ryugu sample display• 12/4 （Sat.）～13（Mon.）（Press preview on morning of Dec. 3）• https://www.miraikan.jst.go.jp/en/news/general/202111102216.html〇Sagamihara City Museum• Ryugu sample exhibit• 12/6 （Mon.）～12（Sun.） Advanced reservation required• https://sagamiharacitymuseum.jp/2021/12/6

Hayabusa2 reporter briefing

13Reference

2021/12/6

Hayabusa2 reporter briefing

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Future of JAXA’s sample return exploration and curation• Based on the experience gained from Hayabusa/Hayabusa2, JAXA has formed a partnershipwith NASA and other institutes for world leading exploration and curation activities in the 2020s.
• To continue to push the boundaries of sample return exploration, the Martian MoonseXploration (MMX) mission will be launched in 2024 FY, with the aim of returning the firstsample from the Martian sphere during the 2020s.

World first SR from the Martian sphere

SR of gas and organic matterfrom carbonaceous asteroids
Successful
asteroid SR

Development of curation
technology for large quantities
of carbonaceous asteroid
samples

Scheduled to returnin 2029

OSIRIS-REx（NASA)
Sample return 2023

Hayabusa2:
Sample return 2020
Hayabusa︓Sample return 2010

2021/12/6

Global future Mars SR:• NASA/ESA︓Return 2031
• China︓Return 2030s?

Mars lander
2022 ExoMars (ESA)
2021.5 Tianwen-1（China）
2021.2 Perseverance (NASA)

Martian Moons eXploration (MMX)
Hayabusa2 reporter briefing

15

Initial analysis summary・Supervisor

Shogo Tachibana （U. Tokyo）

・Chemical analysis team

Hisayoshi Yurimoto （Hokkaido U.）

・Stoney material analysis team

Tomoki Nakamura （Tohoku U.）

・Sandy material analysis teamTakaaki Noguchi （Kyoto U. / Kyushu U.）・Volatile component analysis team Ryuji Okazaki （Kyushu U. ）・Organic macromolecule analysis team・Soluble organics analysis team

Hikaru Yabuta （Hiroshima U.）

Hiroshi Naraoka （Kyushu U.）

109 universities and research institutes in
14 countries, 269 people.
（image credit Shogo Tachibana）
2021/12/6

Hayabusa2 reporter briefing

16Summary of ion engine operation for the nominal mission

Summary of ion engine operation (at 17 Sept. 2020)
Hayabusa2Thruster• On September 17, 2020 at 03:15:45 am JST,the ion engines were shutdown as planned,
after a total of 22, 348 hours of operation.
This completed the round-trip ion engine
operation to Ryugu.

to goreturnround trip

Hayabusa

cumulative
operation time,(hour)

ON/OFF cycle

All

Total Impulse,
MNs

MaxImum
Thrust, mN

https://www.hayabusa2.jaxa.jp/topics/
20200925_IonEngine/2021/12/6

Including operation test. IES indicates the total time when one or more
ion engines were operated. (Powered flight operation time)

Hayabusa2 reporter briefing

17Receiving the IAF World Space Award• This year (2021) the Hayabusa2 team was awarded the “IAF World Space Award”.
• The award ceremony was held at the opening of the 72nd International
Astronautical Congress（IAC) on October 25 in Dubai.

At the award ceremony. Project ManagerTsuda (right) and JAXA President
Yamakawa (second from right)
2021/12/6

Project Manager Tsuda giving a speech at
the award ceremony.
Hayabusa2 reporter briefing

The award certificate and medal.

（credit：JAXA）

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