Key statistics
Satellite SKYNET 4D at a glance.
Uptime
10100
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: 12.6116 deg
SMA: 42480.296 km
Apoapsis: 36130.627 km
Periapsis: 36073.695 km
RAAN: 12.5209 deg
Eccentricy: 0.0006701
Argument of periapsis: 165.4618 deg
Mean anomaly: 202.763 deg
Mean motion: 0.99156562 rev/day
Mean motion (dot): -0.00000249 rev/day2
B* drag term: 0.0 1/REarth
Two-line elements (TLE)
Creation date: Sept. 3, 2025, 10:15 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Sept. 3, 2025, 3:53 a.m. UTC
TLE line 0: 0 SKYNET 4D
TLE line 1: 1 25134U 98002A 25246.16231392 -.00000249 00000-0 00000-0 0 9996
TLE line 2: 2 25134 12.6116 12.5209 0006701 165.4618 202.7630 0.99156562100530
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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