Call for Proposals: 4th Announcement of Opportunity for Ryugu Samples

The call for proposals for the 4th Announcement of Opportunity (AO4) for research analysis on the samples from asteroid Ryugu, and the registration and submission site for the proposals, are now open.

The call for proposals for the next Announcement of Opportunity (AO5) is scheduled in one year, around July 2024. Please note that AO4 is therefore the last chance to receive Ryugu samples in 2024!

AO4 Website:

Ryugu sample database:

Key milestones:

  • Call for proposals for AO4: July 31, 2023
  • Notice of Intent due (mandatory): September 18, 2023
  • Sample request submission due: October 23, 2023
  • Decision announcement: Late December 2023
  • Sample distribution: January 2024
  • Call for proposals for AO5: July 2024 (TBA)

Please check the Ryugu sample catalog and consider your research proposal based on the information described in the guidebook.

Proposers who are interested in submitting a proposal for AO4 need to submit a Notice of Intent (NOI) by September 18, 2023. Please login with your account and click Registration to register for AO4. After registration, proposals can be submitted.

We are looking forward to receiving wonderful proposals from you!

-The Ryugu AO Administration Office ([email protected])