Satellite · NORAD 25153 · COSPAR 1998-006B
INMARSAT 3-F5
- Operator Viasat
- Constellation Viasat / Inmarsat fleet
- Country United Kingdom
Altitude now
35,776.2km
SGP4 propagation
Velocity
3.08km/s
Inclination
9.88°
Period
23.9 h
1,436.0 min
Perigee
35,767km
Apogee
35,804km
orbit freshOrbit updated 8 h ago · element epoch 11 Sept 2026 08:33 UTC (11.0 h old)· Metadata updated 8 h ago
Live position
Ground track & current position
Propagated client-side every 5 s from the latest element set (SGP4). Accuracy degrades with element age.
Loading ground track…
- Latitude
- 0.262° N
- Longitude
- 53.950° W
- Altitude
- 35776.2 km
- Velocity
- 3.075 km/s
- past 45 min
- next 90 min
- first fix from server render · element epoch 11 Sept 2026 08:33 UTC
Mission
Mission & classification
- Mission type derived
- Communications
- Object type
- Payload
- SATCAT ops status
- Operational [+]
- Radar cross-section
- 14.5 m²
- Constellation membership derived
- Viasat / Inmarsat fleet via name_pattern
Ownership
Operator & country
- Operator
- Viasat
- SATCAT owner code
- IM · Inmarsat
- Country
- United Kingdom GB
Launch
Launch
- Launch date
- 04 Feb 1998
- COSPAR launch id
- 1998-006
- Launch site
- Guiana Space Centre, Kourou
Objects from the same launch · 3
- ARIANE DEB [SPELDA]25155DebrisDecayed
- BRASILSAT B325152PayloadUnknown
- ARIANE 44LP R/B25154Rocket bodyDecayed
Change log
History
| Field | Change | Source | Date |
|---|---|---|---|
| Country Code | US → GB | Celestrak Satcat | 11 Sept 2026 18:53 UTC |
| Owner Code | ∅ → IM | Celestrak Satcat | 11 Sept 2026 18:53 UTC |
| Orbit Class | ∅ → GEO | Celestrak | 11 Sept 2026 18:53 UTC |
Regulatory
UN registration
Transparency
Sources & provenance
CelesTrakcommunity
Orbital data courtesy of CelesTrak (Dr. T.S. Kelso).
last sync 8 h ago
CelesTrak SATCATcommunity
Satellite catalog data courtesy of CelesTrak.
last sync 8 h ago
Field provenance
| Field | Source | Observed | Confidence |
|---|---|---|---|
| Canonical Name | CelesTrak SATCAT | 11 Sept 2026 18:53 UTC | 100% |
| Decay Date | CelesTrak SATCAT | 11 Sept 2026 18:53 UTC | 100% |
| Launch Date | CelesTrak SATCAT | 11 Sept 2026 18:53 UTC | 100% |
| Object Type | CelesTrak SATCAT | 11 Sept 2026 18:53 UTC | 100% |
| Orbital Elements | CelesTrak | 11 Sept 2026 18:53 UTC | 100% |
| Owner Code | CelesTrak SATCAT | 11 Sept 2026 18:53 UTC | 100% |
| Status | CelesTrak SATCAT | 11 Sept 2026 18:53 UTC | 100% |
Timeline
Events
No events detected for this object yet. Launches, decays and orbit changes are generated by the derived-analytics connector.
Reference
Identifiers
- NORAD catalogue number
- 25153
- COSPAR / international designator
- 1998-006B
- SatelliteIndex id
- sat_01M28X2SWT01QM2JGQ9QTBM232
- Canonical slug
- inmarsat-3-f5-25153
Orbit class, mission type and constellation membership are derived by SatelliteIndex (Communications) — see the methodology. Positions are propagated estimates, not tracking measurements; never use them for conjunction assessment.