Call for Proposals: Third Announcement of Opportunity for Ryugu Samples

We are pleased to announce that the call for proposals for the third announcement of opportunity (AO3) for Ryugu samples is now open.

AO3 Website:

Ryugu sample database:

Important dates:

  • Notice of intent to propose (mandatory): Due April 14
  • Sample request submission: Due May 1
  • Decision announcement: No later than early July
  • Sample distribution: July, 2023
  • Call for proposals for the fourth AO: July (TBA)

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

Anybody who wants to submit a sample request for the third AO, please login to your account and register by April 14. The proposal submission deadline is May 1.

Because samples from B-type asteroid Bennu will be returned by OSIRIS-REx in this September, this AO will be the last chance to study Ryugu samples before their return.