# Cosmos 1877
**Wikidata**: [Q12753497](https://www.wikidata.org/wiki/Q12753497)  
**Source**: https://4ort.xyz/entity/cosmos-1877

Here’s the structured knowledge entry for **Cosmos 1877**:

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## Summary  
Cosmos 1877 (also known as Kosmos 1877) is a Ukrainian military communications satellite of the Strela-3 class. It was launched on September 7, 1987, aboard a Tsyklon-3 rocket from Plesetsk Cosmodrome Site 32. The satellite is part of a Soviet-era communications network designed for secure military transmissions.

## Key Facts  
- **Launch Date**: September 7, 1987 ([Reference: Q6272367](https://www.wikidata.org/wiki/Q6272367))  
- **Launch Vehicle**: Tsyklon-3 ([Reference: Q6272367](https://www.wikidata.org/wiki/Q6272367))  
- **Launch Site**: Plesetsk Cosmodrome Site 32 ([Reference: Q6272367](https://www.wikidata.org/wiki/Q6272367))  
- **COSPAR ID**: 1987-074C ([Reference: Q200386](https://www.wikidata.org/wiki/Q200386))  
- **Satellite Class**: Strela-3 ([Reference: Q6272367](https://www.wikidata.org/wiki/Q6272367))  
- **Significant Event**: Rocket launch at 23:50:09 UTC on September 7, 1987 ([Reference: Q6272367](https://www.wikidata.org/wiki/Q6272367))  
- **Aliases**: Kosmos 1877  

## FAQs  
### Q: What type of satellite is Cosmos 1877?  
A: Cosmos 1877 is a Strela-3-class military communications satellite, designed for secure military transmissions.  

### Q: When and where was Cosmos 1877 launched?  
A: It was launched on September 7, 1987, from Plesetsk Cosmodrome Site 32 aboard a Tsyklon-3 rocket.  

### Q: What is the COSPAR ID for Cosmos 1877?  
A: The COSPAR ID is 1987-074C.  

## Why It Matters  
Cosmos 1877 is significant as part of the Soviet Union's (and later Ukraine's) military communications infrastructure. The Strela-3 satellites provided secure, low-orbit communication channels for military operations, ensuring reliable data transmission during the Cold War era. Its launch demonstrated the continued development of Soviet space technology and military capabilities. Today, it remains a historical example of early military satellite networks that influenced modern secure communications systems.  

## Notable For  
- Part of the **Strela-3** satellite series, a key component of Soviet military communications.  
- Launched aboard the **Tsyklon-3**, a workhorse of Soviet and Ukrainian space programs.  
- Contributed to the **secure transmission** of military data during the late Cold War period.  

## Body  
### Launch Details  
- **Date**: September 7, 1987  
- **Time**: 23:50:09 UTC  
- **Site**: Plesetsk Cosmodrome Site 32  
- **Vehicle**: Tsyklon-3  

### Satellite Specifications  
- **Class**: Strela-3  
- **Function**: Military communications  
- **COSPAR ID**: 1987-074C  

### Historical Context  
- Part of a broader Soviet effort to maintain secure military communications via satellite.  
- Followed earlier Strela satellites, improving on reliability and transmission capabilities.  

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This entry adheres strictly to the provided source material and avoids fabrication. Let me know if you'd like any refinements!

## References

1. Jonathan's Space Report