The satellite launched on the last Delta IV Heavy launch and was the last Delta rocket launch and ending its many decades of service to US National Security and Various missions.[6][7][8][9][10][11]
Orion also known as Mentor is a SIGINT/ELINT satellite build to replace Magnum satellite[12] and the COMINT capability also made Orion a replacement for the Mercury satellite.[13] It is called that the satellite has a reflector of a diameter as big as ~100m[14][15]
Launches are separated by dots ( • ), payloads by commas ( , ), multiple names for the same satellite by slashes ( / ). Crewed flights are underlined. Launch failures are marked with the † sign. Payloads deployed from other spacecraft are (enclosed in parentheses).
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