# Cosmos 877
**Wikidata**: [Q12754045](https://www.wikidata.org/wiki/Q12754045)  
**Source**: https://4ort.xyz/entity/cosmos-877

## Summary
Cosmos 877 is a Soviet military communications satellite launched in 1976 as part of the Strela-1M constellation. It was launched aboard a Kosmos-3M rocket from the Plesetsk Cosmodrome and served as one of multiple satellites in the Strela-1M network.

## Key Facts
- **Launch Date:** December 7, 1976  
- **COSPAR ID:** 1976-118G  
- **Satellite Catalog Number:** 09594  
- **Launch Vehicle:** Kosmos-3M rocket  
- **Launch Site:** Plesetsk Cosmodrome Site 132  
- **Satellite Class:** Strela-1M  
- **Operator:** Soviet Union (later Russia)  
- **Significant Event:** Rocket launch at 10:23 UTC  

## FAQs
### Q: What was the purpose of Cosmos 877?  
A: Cosmos 877 was a military communications satellite designed to support secure Soviet military communications as part of the Strela-1M constellation.  

### Q: Where was Cosmos 877 launched from?  
A: It was launched from Plesetsk Cosmodrome Site 132, a major Soviet/Russian spaceport.  

### Q: What rocket carried Cosmos 877 into orbit?  
A: It was launched aboard a Kosmos-3M rocket, a reliable Soviet launch vehicle used for small payloads.  

## Why It Matters  
Cosmos 877 played a crucial role in the Soviet Union's military communications infrastructure during the Cold War. As part of the Strela-1M constellation, it facilitated secure and reliable data transmission for military operations, enhancing command and control capabilities. The satellite's deployment underscored the USSR's investment in space-based military technology, competing with Western advancements in satellite communications. Its launch also demonstrated the operational reliability of the Kosmos-3M rocket, which became a workhorse for Soviet and later Russian space missions.  

## Notable For  
- Being part of the Strela-1M military communications network.  
- Launched aboard the widely used Kosmos-3M rocket.  
- One of multiple satellites deployed in a single mission (as indicated by its COSPAR ID suffix "G").  

## Body  
### Launch Details  
- **Date:** December 7, 1976  
- **Time:** 10:23 UTC  
- **Site:** Plesetsk Cosmodrome Site 132  

### Satellite Specifications  
- **Class:** Strela-1M  
- **Catalog Number:** 09594  
- **COSPAR Designation:** 1976-118G  

### Mission Context  
- Part of a larger Soviet effort to deploy secure military communications satellites.  
- Operated alongside other Strela-1M satellites to ensure redundancy and coverage.  

### Launch Vehicle  
- **Rocket:** Kosmos-3M  
- **Country of Origin:** Soviet Union  
- **Payload Capacity:** ~1,500 kg (typical for Kosmos-3M missions).

## References

1. Jonathan's Space Report