Key statistics
Satellite SKYNET 4A at a glance.
Uptime
12974
Days in orbit
Revolutions
≈ 1.0
Per day
Orbit
OTHER
Other
Inclination
12.6
Latest
Satellite identification and parameters
Extended collection of information and parameters for SKYNET 4A.
Object identification
Identified? True
Debris? False
Object name: SKYNET 4A
International designator: 1990-001A
Object number (NORAD): 20401
Object ID (CCSDS): 20401
Country: UNITED KINGDOM (UK)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 1454.523 minutes
Inclination: 12.6202 deg
SMA: 42524.632 km
Apoapsis: 36197.441 km
Periapsis: 36095.552 km
RAAN: 351.5728 deg
Eccentricy: 0.001198
Argument of periapsis: 301.6006 deg
Mean anomaly: 70.4611 deg
Mean motion: 0.99001533 rev/day
Mean motion (dot): -0.0000023 rev/day2
B* drag term: 0.0 1/REarth
Two-line elements (TLE)
Creation date: July 9, 2025, 2:22 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: July 8, 2025, 5:50 p.m. UTC
TLE line 0: 0 SKYNET 4A
TLE line 1: 1 20401U 90001A 25189.74319141 -.00000230 00000-0 00000-0 0 9998
TLE line 2: 2 20401 12.6202 351.5728 0011980 301.6006 70.4611 0.99001533 43374
Live tracking on map
Real-time ground track for satellite SKYNET 4A.
In-orbit conjunctions
There are no conjunctions computed for SKYNET 4A, at the moment. Check back to stay up to date, as we update our databases every day.
Go to all conjunctionsAssociated space launch
British and Japanese geostatioary communications satellites
SKYNET 4A was lifted into orbit during the mission ‘Commercial Titan III | Skynet 4A & JCSat 2’, on board a Commercial Titan III space rocket.
The launch took place on Jan. 1, 1990, 12:07 a.m. from Space Launch Complex 40.
For more information about the launch, click the button.
Commercial Titan III | Skynet 4A & JCSat 2
Agency: N/A
Status: Launch Successful
Launch date: Jan. 1, 1990, 12:07 a.m. UTC
Rocket: Commercial Titan III
Launch pad: Space Launch Complex 40
Location: Cape Canaveral SFS, FL, 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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