Satellite · NORAD 23839 · COSPAR 1996-020A
INMARSAT 3-F1
- Operator Viasat
- Constellation Viasat / Inmarsat fleet
- Country United Kingdom
Altitude now
35,862.5km
SGP4 propagation
Velocity
3.07km/s
Inclination
10.78°
Period
24.0 h
1,440.0 min
Perigee
35,834km
Apogee
35,891km
orbit freshOrbit updated 8 h ago · element epoch 11 Sept 2026 15:40 UTC (3.9 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
- 8.790° N
- Longitude
- 175.399° E
- Altitude
- 35862.5 km
- Velocity
- 3.072 km/s
- past 45 min
- next 90 min
- first fix from server render · element epoch 11 Sept 2026 15:40 UTC
Mission
Mission & classification
- Mission type derived
- Communications
- Object type
- Payload
- SATCAT ops status
- Backup / standby [B]
- Radar cross-section
- 1.2 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
- 03 Apr 1996
- COSPAR launch id
- 1996-020
Objects from the same launch · 1
- ATLAS 2A CENTAUR R/B23840Rocket bodyInactive
Change log
History
| Field | Change | Source | Date |
|---|---|---|---|
| Status | ACTIVE → INACTIVE | Celestrak Satcat | 11 Sept 2026 18:53 UTC |
| 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
11 Sept 2026 18:53 UTC
DecommissionINMARSAT 3-F1 reported inactive
SATCAT status changed ? → B.
confidence 80%
Reference
Identifiers
- NORAD catalogue number
- 23839
- COSPAR / international designator
- 1996-020A
- SatelliteIndex id
- sat_01M28X2SWS09G5GTPVRR2KEN2G
- Canonical slug
- inmarsat-3-f1-23839
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.