USA-353

USA-353 is an American SIGINT reconnaissance satellite which is operated by the National Reconnaissance Office. Launched in April 2024, it is the secret Orion satellite.

Overview

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.
Orion also known as Mentor is a SIGINT/ELINT satellite build to replace Magnum satellite and the COMINT capability also made Orion a replacement for the Mercury satellite. It is called that the satellite has a reflector of a diameter as big as ~100m