GO 17915

Thu Jul 16 22:21:27 EDT 2026

Principal Investigator: Adam Riess
PI Institution: The Johns Hopkins University
Investigators (XML)

Title: Completing the HST+Gaia Reference Sample to Optimize the Measurement of the Hubble Constant
Cycle: 32
External Allocation: 25 orbits
Proprietary Period: 6 months

Program Status: Scheduling

Program Coordinator: William Januszewski Contact
Contact Scientist: Amanda Pagul 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.
• Report an observing problem.