# Cosmos 2129
**Wikidata**: [Q12907583](https://www.wikidata.org/wiki/Q12907583)  
**Source**: https://4ort.xyz/entity/cosmos-2129

## Summary
Cosmos 2129 is a Strela-1M satellite launched by the Soviet Union on February 12, 1991, using a Kosmos-3M rocket from Plesetsk Cosmodrome Site 133. It has the COSPAR ID 1991-009E and Satellite Catalog Number 21104.

## Key Facts
- Cosmos 2129 is an instance of the Strela-1M satellite class
- Launch date: February 12, 1991
- Launch location: Plesetsk Cosmodrome Site 133
- Launch vehicle: Kosmos-3M rocket
- COSPAR ID: 1991-009E
- Satellite Catalog Number (SCN): 21104
- Launch time: 02:44:00
- Available in Wikipedia languages: hr, mk, sh, sr
- Wolfram Language Entity Code: Entity["Satellite", "21104"]
- Sitelink count: 4

## FAQs
### Q: What type of satellite is Cosmos 2129?
A: Cosmos 2129 is a Strela-1M satellite, which was a type of military communications satellite used by the Soviet Union.

### Q: When and where was Cosmos 2129 launched?
A: Cosmos 2129 was launched on February 12, 1991, from Plesetsk Cosmodrome Site 133 at 02:44:00 using a Kosmos-3M rocket.

### Q: What is the significance of the COSPAR ID 1991-009E?
A: The COSPAR ID 1991-009E is a unique identifier assigned to Cosmos 2129 by the Committee on Space Research, where "1991" indicates the year of launch and "009E" indicates it was the 9th satellite launched that year.

### Q: Is there information about Cosmos 2129 available in multiple languages?
A: Yes, information about Cosmos 2129 is available in Wikipedia in Croatian (hr), Macedonian (mk), Serbo-Croatian (sh), and Serbian (sr) languages.

## Why It Matters
Cosmos 2129 represents part of the Soviet Union's Strela-1M satellite program, which served as an important military communications network for the USSR. Launched in 1991 during the final year of the Soviet Union's existence, this satellite and its siblings were crucial for maintaining secure military communications across vast distances. The Strela-1M satellites were part of a larger constellation designed to provide reliable communication services to military forces, including naval vessels and ground units. As one of the last satellites launched by the Soviet Union before its dissolution, Cosmos 2129 provides insight into the late-Soviet space program's capabilities and priorities.

## Notable For
- Part of the Strela-1M satellite class, which was specifically designed for military communications
- Launched during the final year of the Soviet Union's existence, providing insight into late-Soviet space capabilities
- One of only 4 sitelink entities, suggesting limited but notable coverage across language editions
- Has a specific launch time recorded (02:44:00), indicating precise operational requirements
- Featured in both Serbo-Croatian and Serbian Wikipedia editions, reflecting regional coverage

## Body
### Basic Information
Cosmos 2129 is a Strela-1M satellite launched by the Soviet Union on February 12, 1991. It has the Satellite Catalog Number (SCN) 21104 and the COSPAR ID 1991-009E. The satellite was launched at 02:44:00 from Plesetsk Cosmodrome Site 133 using a Kosmos-3M rocket.

### Technical Specifications
- Class: Strela-1M
- Launch vehicle: Kosmos-3M (Russian rocket)
- Launch site: Plesetsk Cosmodrome Site 133
- Launch date: February 12, 1991
- Launch time: 02:44:00
- Country of origin: Soviet Union

### Data Sources and Documentation
- Information referenced from Q6272367 (Wikidata entity)
- Sitelink count: 4 (indicating coverage in 4 language editions)
- Available Wikipedia languages: Croatian (hr), Macedonian (mk), Serbo-Croatian (sh), Serbian (sr)
- Wolfram Language Entity Code: Entity["Satellite", "21104"]

### Related Entities
- Strela-1M [class]: The satellite class to which Cosmos 2129 belongs
- Kosmos-3M: The rocket used for the launch
- Plesetsk Cosmodrome Site 133: The launch facility

## References

1. Jonathan's Space Report