Key statistics
Satellite USA 521 at a glance.
Uptime
18
Days in orbit
Revolutions
N/A
Per day
Orbit
N/A
None
Inclination
N/A
Latest
Satellite identification and parameters
Extended collection of information and parameters for USA 521.
Object identification
Object name: USA 521
International designator: 2025-077A
Object number (NORAD): 63596
Object ID (CCSDS): 63596
Country: UNITED STATES OF AMERICA (US)
Current information (Y/N): Y
Notes: NO INITIAL ELEMENTS
Orbital parameters
Inclination: None deg
Period: None minutes
Apoapsis: None km
Periapsis: None km
Two-line elements (TLE)
TLE not available at the moment. Check back as we update our database every day.
Live tracking on map
Live tracking is not available at the moment. Either this satellite is not in an Earth-centered orbit, or we haven't yet computed its ground track. Check back as we update our database every day.
In-orbit conjunctions
There are no conjunctions computed for USA 521, at the moment. Check back to stay up to date, as we update our databases every day.
Go to all conjunctionsAssociated space launch
Classified payload for the U.S. National Reconnaissance Office.
USA 521 was lifted into orbit during the mission ‘Minotaur IV | NROL-174’, on board a Minotaur IV space rocket.
The launch took place on April 16, 2025, 7:33 p.m. from Space Launch Complex 8.
For more information about the launch, click the button.
Minotaur IV | NROL-174
Agency: National Reconnaissance Office
Status: Launch Successful
Launch date: April 16, 2025, 7:33 p.m. UTC
Rocket: Minotaur IV
Launch pad: Space Launch Complex 8
Location: Vandenberg SFB, CA, USA
...
Latest news about this satellite
Minotaur IV Rocket Launches Classified NROL-174 Payloads from Vandenberg in Return to California Skies
Minotaur IV Rocket Launches Classified NROL-174 Payloads from Vandenberg in Return to California Skies
Rocket Report: Daytona rocket delayed again; Bahamas tells SpaceX to hold up
A Falcon 9 core has now launched as many times as there are Merlins on a Falcon Heavy.
Minotaur IV rocket launches spy payloads for National Reconnaissance Office
The mission, designated NROL-174, lifted off at 3:33 p.m. Eastern from Space Launch Complex 8 (SLC-8) at Vandenberg. The post Minotaur IV rocket launches spy payloads for National Reconnaissance Office appeared first on SpaceNews.
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