Key statistics
Satellite USA 56 at a glance.
Uptime
12934
Days in orbit
Revolutions
≈ 14.8
Per day
Orbit
LEO
Low Earth Orbit
Inclination
89.8
Latest
Satellite identification and parameters
Extended collection of information and parameters for USA 56.
Object identification
Identified? True
Debris? False
Object name: USA 56
International designator: 1990-031A
Object number (NORAD): 20560
Object ID (CCSDS): 20560
Country: UNITED STATES OF AMERICA (US)
Current information (Y/N): Y
RCS size: MEDIUM
Orbital parameters
Period: 97.5 minutes
Inclination: 89.8479 deg
SMA: 7017.171 km
Apoapsis: 681.798 km
Periapsis: 596.274 km
RAAN: 266.1619 deg
Eccentricy: 0.00609392
Argument of periapsis: 196.818 deg
Mean anomaly: 163.1023 deg
Mean motion: 14.76929312 rev/day
Mean motion (dot): 0.00001343 rev/day2
B* drag term: 0.00018290657 1/REarth
Two-line elements (TLE)
Creation date: Sept. 7, 2025, 3:09 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Sept. 6, 2025, 1:09 p.m. UTC
TLE line 0: 0 USA 56
TLE line 1: 1 20560U 90031A 25249.54829595 .00001343 00000-0 18291-3 0 9990
TLE line 2: 2 20560 89.8479 266.1619 0060939 196.8180 163.1023 14.76929312 70828
Live tracking on map
Real-time ground track for satellite USA 56.
In-orbit conjunctions
There are no conjunctions computed for USA 56, 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 56 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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