# Inmarsat 2-F4
**Wikidata**: [Q18327661](https://www.wikidata.org/wiki/Q18327661)  
**Source**: https://4ort.xyz/entity/inmarsat-2-f4

## Summary
Inmarsat 2-F4 is a communications satellite launched on April 15, 1992. It was deployed into orbit using an Ariane 44L rocket from the ELA-2 launch site. The satellite is cataloged under the international designation 1992-021B and the Satellite Catalog Number 21940.

## Key Facts
- **Classification:** Inmarsat 2-F4 is an instance of a communications satellite, designed for telecommunications purposes.
- **Launch Date:** The satellite was launched on April 15, 1992.
- **Launch Vehicle:** It was delivered to orbit by an Ariane 44L rocket.
- **Launch Site:** The launch took place at ELA-2 (Ensemble de Lancement 2).
- **COSPAR ID:** Its international designator is 1992-021B.
- **Satellite Catalog Number (SCN):** The object is tracked under the number 21940.
- **Significant Event:** The deployment is classified as a "rocket launch" event occurring at ELA-2 on April 15, 1992.
- **Digital Identifiers:** The entity is listed in the Google Knowledge Graph as `/g/11b61jk2tm` and in the Wolfram Language as `Entity["Satellite", "21940"]`.

## FAQs
### Q: When was Inmarsat 2-F4 launched?
A: Inmarsat 2-F4 was launched on April 15, 1992.

### Q: What rocket was used to deploy Inmarsat 2-F4?
A: The satellite was launched aboard an Ariane 44L rocket, a variant of the Ariane 4 series.

### Q: What is the primary function of Inmarsat 2-F4?
A: Inmarsat 2-F4 is a communications satellite, which means it is an artificial satellite designed to facilitate telecommunications.

## Why It Matters
Inmarsat 2-F4 serves as a specific historical data point in the global timeline of space-based telecommunications. As a distinct unit launched in the early 1990s, it represents the era's reliance on geostationary platforms to expand global connectivity. The mission highlights the operational use of the Ariane 44L, a heavy-lift variant of the Ariane 4 rocket family, demonstrating the launch capabilities available at the ELA-2 complex during that period.

For researchers and space trackers, the precise identification of this object via its COSPAR ID (1992-021B) and Satellite Catalog Number (21940) is essential for maintaining accurate records of objects in Earth's orbit. While the specific operational status of the satellite is determined by technical data, its classification as a "communications satellite" underscores its intended role in relaying signals across the globe, a function central to the information infrastructure of the late 20th century.

## Notable For
- Being a designated communications satellite deployed in the early 1990s.
- Utilizing the Ariane 44L launch configuration.
- Being tracked under the specific Satellite Catalog Number 21940.
- Launching from the ELA-2 site, a prominent launch complex.

## Body
### Launch and Deployment
Inmarsat 2-F4 successfully reached space on April 15, 1992. The mission was executed from the ELA-2 launch site, a facility historically associated with the Ariane rocket family. The launch vehicle responsible for carrying the payload was the Ariane 44L, a configuration in the Ariane 4 series often used for lifting communications satellites to geostationary transfer orbits. This event is formally recorded as a "rocket launch" in structured databases.

### Technical Identification
The satellite is precisely identified in global space catalogs to distinguish it from other objects.
*   **COSPAR International Designator:** 1992-021B. This ID indicates the year of launch (1992), the launch number of the year (021), and the component identifier (B).
*   **Satellite Catalog Number (SCN):** 21940. This is the sequential number assigned by the USSPACECOM.

### Classification and Data
Inmarsat 2-F4 is explicitly categorized as an instance of a "communications satellite." This class of artificial satellite is defined by its utility in telecommunications. The entity's data has been verified through multiple references, including Wikipedia (Portuguese language version), the Google Knowledge Graph (ID: `/g/11b61jk2tm`), and the Wolfram Language (Entity code: `Entity["Satellite", "21940"]`).

## References

1. Jonathan's Space Report