# Cosmos 766
**Wikidata**: [Q12753990](https://www.wikidata.org/wiki/Q12753990)  
**Source**: https://4ort.xyz/entity/cosmos-766

## Summary
Cosmos 766 is a Strela-1M communications satellite launched by the Soviet Union on September 17, 1975, from the Plesetsk Cosmodrome using a Kosmos-3M rocket. It was part of a military satellite system designed for secure messaging and data relay.

## Key Facts
- Instance of: Strela-1M (communications satellite class)
- Launch date: September 17, 1975
- Launch vehicle: Kosmos-3M (Soviet rocket)
- Launch site: Plesetsk Cosmodrome Site 132
- COSPAR ID: 1975-086F
- Catalog number (SCN): 08290
- Also known as: Kosmos 766
- Sitelink count: 3 (language versions: Macedonian, Serbo-Croatian, Serbian)

## FAQs
### Q: What was Cosmos 766 used for?  
A: Cosmos 766 was a Strela-1M satellite designed for military communications, facilitating secure message transmission and data relay for Soviet operations.  

### Q: When and where was Cosmos 766 launched?  
A: It was launched on September 17, 1975, at 07:10:00 UTC from Plesetsk Cosmodrome Site 132 aboard a Kosmos-3M rocket.  

### Q: How does Cosmos 766 relate to other satellites?  
A: It belongs to the Strela-1M class, a series of Soviet military communications satellites, and shares its launch platform with other Kosmos missions.  

## Why It Matters
Cosmos 766 exemplifies the Soviet Union's Cold War-era advancements in military satellite technology, particularly in secure communications infrastructure. As part of the Strela program, it enhanced command-and-control capabilities for Soviet forces, demonstrating the strategic value of space-based messaging systems. The mission also underscores the role of Plesetsk Cosmodrome as a key launch site for Soviet military satellites during this period, contributing to broader Cold War technological competition.  

## Notable For
- Military communications role: Part of the Strela-1M class, specifically designed for secure military data transmission  
- Cold War context: Launched during the peak of Soviet-US space and military competition  
- Limited documentation: Only 3 Wikipedia language versions (Macedonian, Serbo-Croatian, Serbian) available  
- Standardized cataloging: Assigned SCN 08290 and COSPAR ID 1975-086F for space registry  

## Body
### Launch Profile
- **Date**: September 17, 1975  
- **Time**: 07:10:00 UTC  
- **Vehicle**: Kosmos-3M rocket  
- **Site**: Plesetsk Cosmodrome Site 132  
- **Registry**: COSPAR ID 1975-086F  

### Technical Classification
- **Class**: Strela-1M (communications satellite)  
- **Nation**: Soviet Union  
- **Series**: Cosmos/Kosmos military satellites  
- **Catalog**: SCN 08290  

### Program Context
- **System**: Strela military communications network  
- **Purpose**: Secure messaging for Soviet military operations  
- **Predecessor**: Earlier Strela-1M missions  
- **Successor**: Subsequent Strela constellation replenishment  

### Digital Presence
- **Wikipedia**: Available in Macedonian, Serbo-Croatian, and Serbian  
- **Sitelinks**: 3 total language editions  
- **Structured Data**: Wikidata entry with 16 references to Soviet space programs  
- **External ID**: Wolfram Entity code `Entity["Satellite", "08290"]`

## References

1. Jonathan's Space Report