Skip to content
SatelliteIndex

Satellite · NORAD 21940 · COSPAR 1992-021B

INMARSAT 2-F4

UnknownPayloadGEOCommunications derived

Altitude now

—

no element set

Velocity

—

Inclination

12.24°

Period

1.0 d

1,470.3 min

Perigee

36,416km

Apogee

36,489km

orbit unavailableNo orbital element set on file.· Metadata updated 9 h ago

Live position

Live position

Live position unavailable — no public orbital element set exists for this object (it may be classified, untracked or too small to catalogue).

Mission

Mission & classification

Mission type derived
Communications
Object type
Payload
SATCAT ops status
Non-operational [-]
Radar cross-section
14.0 m²
Constellation membership derived
Viasat / Inmarsat fleet via name_pattern

CelesTrak groups

Not listed in any CelesTrak group.

Aliases

  • INMARSAT 2-F4Celestrak Satcat

Ownership

Operator & country

Operator
Viasat
SATCAT owner code
IM · Inmarsat
Country
United Kingdom GB

Launch

Launch

Launch page →
Launch date
15 Apr 1992
COSPAR launch id
1992-021
Launch site
Guiana Space Centre, Kourou

Objects from the same launch · 20

All objects from launch 1992-021 →

Change log

History

No changes recorded since first ingestion on 11 Sept 2026 18:54 UTC. Status, orbit class, name and ownership changes are logged here as sources are re-ingested.

Regulatory

UN registration

UN Register of Objects Launched into Outer Space (UNOOSA) — connector planned, not yet ingested; registration unavailable

Transparency

Sources & provenance

All sources →

No source is linked to this record yet — the catalogue row exists but no provenance entry has been written for it.

Field provenance

No field-level provenance recorded.

Timeline

Events

All 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
21940
COSPAR / international designator
1992-021B
SatelliteIndex id
sat_01M28X3JPNE05RK6B07DEFHSG5
Canonical slug
inmarsat-2-f4-21940

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.