GO 17303

Thu Jul 16 22:19:39 EDT 2026

Principal Investigator: Ryan Cooke
PI Institution: Durham University
Investigators (XML)

Title: The primordial helium isotope ratio
Cycle: 30
External Allocation: 1 orbits
Proprietary Period: 3 months

Program Status: Program has been Completed

Program Coordinator: Tricia Royle Contact
Contact Scientist: Christian Johnson Contact

Program Contents

• APT File
• Formatted Listing
• Public PDF
• HST Archive Information

Visit Status Information (XML)

Requests

• Report a duplication of an observation in this program by another HST program.
• Request an observing change.