USSF-51
United States Space Force National security Mission
From Wikipedia, the free encyclopedia
USSF-51 is an American National Security Space Launch Mission under the vision of United States Space Force. The launch is significant as it is the Last launch for United Launch Alliance's Atlas V rocket for National Security Mission. After reaching orbit Three Satellite are deployed named USA-396, USA-397 and USA-398. In October 2025, one more satellite is deployed named USA-566 and after that deployed more satellite USA-567, 568 and 569.[1][2][3][4][5][6][7][8]
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USSF-51 Launch | |
| Operator | USSF |
|---|---|
| Start of mission | |
| Launch date | 30 July 2024 10:45 UTC |
| Rocket | Atlas V 551 (AV-101) |
| Launch site | Cape Canaveral, SLC-41 |
| Contractor | United Launch Alliance |
| Orbital parameters | |
| Reference system | Geocentric orbit |
| Regime | Geosynchronous orbit |
Overview
USSF had assigned USSF-106 Mission to ULA in 2020. At the time it was planned to be the first National Security Mission on Vulcan Centaur but after reassignment to an Atlas V, USSF-106 become the first National Security Mission on Vulcan Centaur.[9]
This mission is also last use of Russian RD-180 engine on US National Security Missions which is used on ULA's Atlas V rocket and is replaced with American made BE-4 engines, two of them is used on ULA's Vulcan Centaur rocket starting with USSF-106 Mission in August 2025.[10]
