Key statistics
Satellite INMARSAT 2-F4 at a glance.
Uptime
12197
Days in orbit
Revolutions
≈ 1.0
Per day
Orbit
OTHER
Other
Inclination
11.9
Latest
Satellite identification and parameters
Extended collection of information and parameters for INMARSAT 2-F4.
Object identification
Identified? True
Debris? False
Object name: INMARSAT 2-F4
International designator: 1992-021B
Object number (NORAD): 21940
Object ID (CCSDS): 21940
Country: INTERNATIONAL MARITIME SATELLITE ORGANIZATION (INMARSAT) (IM)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 1470.227 minutes
Inclination: 11.8918 deg
SMA: 42830.16 km
Apoapsis: 36493.244 km
Periapsis: 36410.806 km
RAAN: 17.2018 deg
Eccentricy: 0.00096238
Argument of periapsis: 165.6347 deg
Mean anomaly: 169.802 deg
Mean motion: 0.97944086 rev/day
Mean motion (dot): -0.00000142 rev/day2
B* drag term: 0.0 1/REarth
Two-line elements (TLE)
Creation date: Sept. 5, 2025, 10:27 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Sept. 5, 2025, 3:33 a.m. UTC
TLE line 0: 0 INMARSAT 2-F4
TLE line 1: 1 21940U 92021B 25248.14841183 -.00000142 00000-0 00000-0 0 9999
TLE line 2: 2 21940 11.8918 17.2018 0009624 165.6347 169.8020 0.97944086 47855
Live tracking on map
Real-time ground track for satellite INMARSAT 2-F4.
Associated space launch
Télécom 2B and Inmarsat-2 F4 are French and International communications satellites operating in GEO.
INMARSAT 2-F4 was lifted into orbit during the mission ‘Ariane 44L | Télécom 2B & Inmarsat-2 F4’, on board a Ariane 44L space rocket.
The launch took place on April 15, 1992, 11:25 p.m. from Ariane Launch Area 2.
For more information about the launch, click the button.
Ariane 44L | Télécom 2B & Inmarsat-2 F4
Agency: N/A
Status: Launch Successful
Launch date: April 15, 1992, 11:25 p.m. UTC
Rocket: Ariane 44L
Launch pad: Ariane Launch Area 2
Location: Guiana Space Centre, French Guiana
...
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