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COO Telescope Time Solicitations

Here you'll find material on proposing for Keck and Palomar observing time through COO.

Current Solicitation: Semester 2027A

Closed Solicitations (provided for reference):

2026B  2026A  2025B  2025A  2024B  2024A 

Proposal Eligibility

COO Proposal Eligibility (information on COO proposal eligibility for Caltech Palomar & Keck time)

P200 Large Projects

P200 Large Project Policy

Merging PDF Files

Merging PDF Files

The Pilina and Kōkua (PK) Initiative

PK Initiative page

[an error occurred while processing this directive] COO Solicitations Index Page / v01Sept2026
Last updated: 01 September 2026 ACM/AFB/RJB