Key statistics
Satellite SKYNET 4D at a glance.
Uptime
10148
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 4D.
Object identification
Identified? True
Debris? False
Object name: SKYNET 4D
International designator: 1998-002A
Object number (NORAD): 25134
Object ID (CCSDS): 25134
Country: UNITED KINGDOM (UK)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 1452.249 minutes
Inclination: 12.6474 deg
SMA: 42480.295 km
Apoapsis: 36129.697 km
Periapsis: 36074.623 km
RAAN: 12.2298 deg
Eccentricy: 0.00064823
Argument of periapsis: 185.5246 deg
Mean anomaly: 182.1074 deg
Mean motion: 0.99156564 rev/day
Mean motion (dot): -0.00000303 rev/day2
B* drag term: 0.0 1/REarth
Two-line elements (TLE)
Creation date: Oct. 23, 2025, 2:46 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Oct. 22, 2025, 1:51 p.m. UTC
TLE line 0: 0 SKYNET 4D
TLE line 1: 1 25134U 98002A 25295.57747064 -.00000303 00000-0 00000-0 0 9994
TLE line 2: 2 25134 12.6474 12.2298 0006482 185.5246 182.1074 0.99156564101028
Live tracking on map
Real-time ground track for satellite SKYNET 4D.
In-orbit conjunctions
There are no conjunctions computed for SKYNET 4D, at the moment. Check back to stay up to date, as we update our databases every day.
Go to all conjunctionsAssociated space launch
Skynet 4 was the third generation of UK Ministry of Defense communications satellites. They provided jam-proof communications service between fixed and mobile land and sea-based ground stations.
SKYNET 4D was lifted into orbit during the mission ‘Delta II | Skynet 4D’, on board a Delta II space rocket.
The launch took place on Jan. 10, 1998, 12:32 a.m. from Space Launch Complex 17B.
For more information about the launch, click the button.
Delta II | Skynet 4D
Agency: N/A
Status: Launch Successful
Launch date: Jan. 10, 1998, 12:32 a.m. UTC
Rocket: Delta II
Launch pad: Space Launch Complex 17B
Location: Cape Canaveral SFS, FL, USA
...
Latest news about this satellite
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