Key statistics
Satellite USA 57 at a glance.
Uptime
12981
Days in orbit
Revolutions
≈ 14.7
Per day
Orbit
LEO
Low Earth Orbit
Inclination
89.8
Latest
Satellite identification and parameters
Extended collection of information and parameters for USA 57.
Object identification
Identified? True
Debris? False
Object name: USA 57
International designator: 1990-031B
Object number (NORAD): 20561
Object ID (CCSDS): 20561
Country: UNITED STATES OF AMERICA (US)
Current information (Y/N): Y
RCS size: MEDIUM
Orbital parameters
Period: 97.77 minutes
Inclination: 89.8419 deg
SMA: 7030.145 km
Apoapsis: 699.281 km
Periapsis: 604.74 km
RAAN: 269.2687 deg
Eccentricy: 0.00672397
Argument of periapsis: 168.1915 deg
Mean anomaly: 192.0902 deg
Mean motion: 14.72842514 rev/day
Mean motion (dot): 0.00001061 rev/day2
B* drag term: 0.00015753892 1/REarth
Two-line elements (TLE)
Creation date: Oct. 25, 2025, 3:11 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Oct. 24, 2025, 11:03 p.m. UTC
TLE line 0: 0 USA 57
TLE line 1: 1 20561U 90031B 25297.96107044 .00001061 00000-0 15754-3 0 9996
TLE line 2: 2 20561 89.8419 269.2687 0067240 168.1915 192.0902 14.72842514 80554
Live tracking on map
Real-time ground track for satellite USA 57.
In-orbit conjunctions
There are no conjunctions computed for USA 57, at the moment. Check back to stay up to date, as we update our databases every day.
Go to all conjunctionsAssociated space launch
POGS & SSR was a satellite designed to measure the Earth's magnetic field. TEX and SCE studied ionospheric effects on RF transmissions.
USA 57 was lifted into orbit during the mission ‘Atlas E Altair | POGS & SSR, TEX, SCE’, on board a Atlas E Altair space rocket.
The launch took place on April 11, 1990, 3 p.m. from Space Launch Complex 3W.
For more information about the launch, click the button.
Atlas E Altair | POGS & SSR, TEX, SCE
Agency: N/A
Status: Launch Successful
Launch date: April 11, 1990, 3 p.m. UTC
Rocket: Atlas E Altair
Launch pad: Space Launch Complex 3W
Location: Vandenberg SFB, CA, USA
...
Latest news about this satellite
There are no fresh news available about this satellite. Check back as we update our databases every day.
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