# Cosmos 831
**Wikidata**: [Q559593](https://www.wikidata.org/wiki/Q559593)  
**Source**: https://4ort.xyz/entity/cosmos-831

## Summary
Cosmos 831 is a Soviet military communications satellite launched in 1976 as part of the Strela-1M constellation. It was deployed using a Kosmos-3M rocket from Plesetsk Cosmodrome Site 132 to support secure military communications.

## Key Facts
- **Launch Date**: June 15, 1976, at 13:19:01 UTC  
- **Launch Vehicle**: Kosmos-3M rocket  
- **Launch Site**: Plesetsk Cosmodrome Site 132  
- **COSPAR ID**: 1976-054G  
- **Satellite Catalog Number**: 08895  
- **Satellite Class**: Strela-1M  
- **Operator**: Soviet Union (later Russia)  
- **Mission Type**: Military communications  

## FAQs
### Q: What was the purpose of Cosmos 831?  
A: Cosmos 831 was a military communications satellite designed to provide secure communication channels for Soviet armed forces.  

### Q: What rocket launched Cosmos 831?  
A: It was launched aboard a Kosmos-3M rocket, a Soviet launch vehicle commonly used for deploying small military satellites.  

### Q: Where was Cosmos 831 launched from?  
A: It lifted off from Plesetsk Cosmodrome Site 132, a major Soviet/Russian launch facility for military and reconnaissance satellites.  

## Why It Matters  
Cosmos 831 was part of the Strela-1M constellation, a critical Soviet military communications network during the Cold War. These satellites enabled secure, low-latency messaging for military operations, intelligence, and command structures. The Strela-1M system was an improvement over earlier versions, offering enhanced reliability and coverage. Its deployment reflected the Soviet Union's emphasis on maintaining robust military communications infrastructure amid geopolitical tensions. Today, historical records of such missions help researchers understand Cold War-era space strategy and technological advancements in satellite communications.  

## Notable For  
- **Military Role**: Part of a classified Soviet military communications network.  
- **Launch Precision**: Deployed alongside other satellites in its constellation for optimal coverage.  
- **Cold War Significance**: Contributed to Soviet strategic communications during heightened tensions.  

## Body  
### Launch Details  
- **Date & Time**: June 15, 1976, at 13:19:01 UTC  
- **Site**: Plesetsk Cosmodrome Site 132 (a primary launch site for Soviet military missions)  
- **Vehicle**: Kosmos-3M, a two-stage liquid-fueled rocket  

### Satellite Specifications  
- **Class**: Strela-1M, a Soviet military communications satellite  
- **Catalog Number**: 08895 (internationally recognized identifier)  
- **COSPAR Designation**: 1976-054G  

### Mission Context  
- Deployed as part of a larger satellite constellation for redundancy and coverage.  
- Operated in low Earth orbit (exact altitude not specified in sources).  
- Followed earlier Strela models, with improvements in signal encryption and reliability.

## References

1. Jonathan's Space Report