▸Orbital parameters

Orbit class	GEO
Inclination	4.3100°
Eccentricity	0.0002725
Period	1436.1 min
Apogee	35,798 km
Perigee	35,775 km
Mean motion	1.00271168 rev/day
RAAN	31.6827°
Arg of perigee	79.2821°
Mean anomaly	121.3486°
B*	0.0000e+0
Rev at epoch	4,674

▸Two-line element set (TLE)

EPOCH Jul 7, 2026SOURCE CelesTrakDERIVED currentUPDATED Jul 7, 2026

1 33278U 08039A 26188.12563008 -.00000128 00000-0 00000-0 0 9995

2 33278 4.3100 31.6827 0002725 79.2821 121.3486 1.00271168 46747

▸ source OMM (JSON)

{
  "OBJECT_NAME": "INMARSAT 4-F3",
  "OBJECT_ID": "2008-039A",
  "EPOCH": "2026-07-07T03:00:54.439+00:00",
  "MEAN_MOTION": 1.00271168,
  "ECCENTRICITY": 0.0002725,
  "INCLINATION": 4.31,
  "RA_OF_ASC_NODE": 31.6827,
  "ARG_OF_PERICENTER": 79.2821,
  "MEAN_ANOMALY": 121.3486,
  "EPHEMERIS_TYPE": 0,
  "CLASSIFICATION_TYPE": "U",
  "NORAD_CAT_ID": 33278,
  "REV_AT_EPOCH": 4674,
  "BSTAR": 0,
  "MEAN_MOTION_DOT": -0.00000128,
  "MEAN_MOTION_DDOT": 0
}

Reconstructed from CelesTrak OMM mean-elements (element-set number is a placeholder). TLE/OMM data is approximate. Not for operational use or collision avoidance.

▸Satellite metadata

Name	INMARSAT 4-F3
Operator	International Maritime Satellite Organization Ltd,HIGHvia GCAT — Jonathan McDowell's General Catalog⚠ sources disagree InmarsatMEDIUMvia Wikidata
Country	United Kingdom
Launch date	Aug 18, 2008HIGHvia GCAT — Jonathan McDowell's General Catalog
Launch mass (kg)	5958HIGHvia GCAT — Jonathan McDowell's General Catalog

▸Data quality

Score90 / 100

Claims8

Sources2

TLEavailable

▸Sources

GCAT — Jonathan McDowell's General CatalogCC BY 4.0planet4589.org
WikidataCC0 1.0query.wikidata.org

▸Actions

GET /api/v1/satellites/33278

//Orbital data is approximate and not for operational use. Last ingested from CelesTrak on Jul 7, 2026.