2026 Astrophysics Small Explorer (APSMEX)
Contract Overview
Solicitation details, issuing organization, response deadlines, documents, and interested companies for this government contract opportunity.
AI Contract Overview
The 2026 Astrophysics Small Explorer (APSMEX) opportunity, identified by solicitation number NNH26ZDA011O, is open for proposals under NASA’s Science Mission Directorate with a firm submission deadline of September 10, 2026 at 3:59 a.m. Eastern Time. All interested parties must consult the NSPIRES website to access the complete and official Announcement of Opportunity, as the provided description is not a substitute for the full text and may not include updates or amendments. Early mandatory steps include submitting a Notice of Intent and attending a virtual Preproposal conference, details of which are contained in the attached 9JuneEmail.pdf and should be reviewed prior to proposal development. Proposals must be submitted in accordance with the guidelines outlined in the official AO, and all inquiries must be directed via email to both designated points of contact—Daniel Moses and Omar Torres—with the subject line “APSMEX26” to ensure proper routing. The opportunity falls under NAICS code 54171 and is managed by NASA Headquarters in Washington, D.C., with no set-aside classification specified. Regular monitoring of NSPIRES and SAM.gov is required to remain informed of any procedural changes or additional guidance.
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Full Description
On or after this SAM.gov notice, the final text for the Announcement of Opportunity (AO) 2026 Astrophysics Small Explorer (APSMEX) will be available for download from the NASA Solicitation and Proposal Integrated Review and Evaluation System (NSPIRES) at https://nspires.nasaprs.com. Click on the word “Solicitations” at the top of the NSPIRES landing page and then on the next page enter the number “NNH26ZDA011O” in the search box or use the direct URL provided below.
This “Description” is not a complete or verbatim summary of the AO. It is the responsibility interested parties to visit and monitor regularly the two listed internet sites (links) for any amendments or other updates.
Please also open and carefully read the attached PDF file named “9JuneEmail.pdf”. The 9JuneEmail attachment is copy of the text that NSPIRES sent to Science Mission Directorate (SMD) List Serv subscribers and includes other and earlier, important dates such as for the submission of a MANDATORY Notice of Intent (NOI) and a virtual Preproposal conference that are prior to the listed Date Offers Due.
After reading the full AO on NSPIRES, please address any comments and questions only via email to both the primary and alternative points of contact listed and use " APSMEX26” in the subject line.