INMARSAT 4-F2, 28899
Orbit data source: Space-Track
INMARSAT 4-F2, 28899 is a payload satellite owned by INMARSAT-Ltd (UK) in GEO that was launched on Tue, 08 Nov 2005 UTC via a ZENIT-3SL launch vehicle from the Sea Launch (SEAL). Payload-class satellites include a variety of spacecraft equipped with specific instruments for various scientific and technological missions. These include communications satellites like Starlink; space stations such as the ISS; scientific satellites like the Hubble; Earth observation satellites from companies like Planet Labs, Umbra, and HawkEye 360; GPS; miniature CubeSats for education and research; and military/defense satellites.
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28899 intel report (Beta)
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Identifier
Orbit
Country
IMRelated business
Manufacturer
Astrium/Toulouse
Mission
Operational Commercial Communications
Bus & Motor
EUROSTAR 3000GM, R-4D-15-375
Mass
5,958 kg wet, 3,271 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Box + 2 Pan + 1 Dish, 22.5 m
Radar Cross Section
57.218 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 1 week ago
TLE from 1 week ago
0 INMARSAT 4-F2
1 28899U 05044A 26154.94643249 -.00000250 00000-0 00000-0 0 9996
2 28899 5.0778 43.7191 0003276 29.7378 303.1482 1.00270607 75381Epoch: 2026-06-03T22:42Z
TLE epoch observation values (Epoch: 2026-06-03T22:42:51.767Z)
Latitude
-2.30564°
Longitude
143.5506°
Altitude
35,779.176 km
Speed
3.075 km/s
True Right ascension
01h 06m 39s
True Declination
-2° 18' 12"
Sunlit
Visualization orbit readout
Latitude
Unknown
Longitude
Unknown
Altitude
Unknown
Speed
Unknown
Apparent Right ascension
Unknown
Apparent Declination
Unknown
Sunlit
Visualization observer readout
Local Sidereal Time
12:46:19
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
35,801.797 km
Perigee altitude
35,774.17 km
Semi-major axis
42,166.12 km
Eccentricity
0.00033
Inclination
5.0778°
RAAN
43.7191°
Arg. of periapsis
29.7378°
True anomaly
303.11676°
Mean anomaly
303.1482°
Eccentric anomaly
303.13248°
Mean motion
0.25067 °/min
Orbital period
1,436.17 mins
BSTAR
0
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Other satellites on launch #44 in the year 2005 (2005-11-08 UTC)
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You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.INMARSAT 4-F2 Visibility
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Span | Click to sort rows by Start time (UTC) header in descending order | Start Az. | Max El. time (UTC) | Max El. Az. | Max El. | End time (UTC) | End Az. |
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| INMARSAT 4-F2 is likely not visible in the next few days. |
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28899 neighbors
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Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
Click to sort rows by RSO header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Type header in ascending order | Click to sort rows by Inclination Δ header in ascending order | Click to sort rows by RAAN Δ header in ascending order | Click to sort rows by Coplanar Angle header in ascending order | Click to sort rows by SMA Δ header in ascending order | Click to sort rows by Orbital period header in ascending order | Click to sort rows by <5km Md TCA header in descending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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Click to sort rows by Secondary header in ascending order | Click to sort rows by Secondary name header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Owner header in ascending order | Click to sort rows by Obj. Type header in ascending order | Click to sort rows by Miss dist. header in ascending order | Click to sort rows by Rel. speed header in ascending order | Click to sort rows by Apr. angle header in ascending order | Click to sort rows by TCA header in descending order |
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