# Cosmos 866
**Wikidata**: [Q12754037](https://www.wikidata.org/wiki/Q12754037)  
**Source**: https://4ort.xyz/entity/cosmos-866

## Summary
Cosmos 866 was a Soviet satellite launched on November 11, 1976, using a Soyuz-U rocket from the Baikonur Cosmodrome. It was an instance of the Zenit-4MK class and was assigned the COSPAR ID 1976-110A. The launch occurred at 10:45:00 UTC from Site 31 of the Baikonur Cosmodrome.

## Key Facts
- **Launch Date**: November 11, 1976
- **Launch Vehicle**: Soyuz-U
- **Launch Site**: Baikonur Cosmodrome Site 31
- **Class**: Zenit-4MK
- **COSPAR ID**: 1976-110A
- **Launch Time**: 10:45:00 UTC
- **Country of Origin**: Soviet Union
- **SCN (Space Catalog Number)**: 09532
- **Wikipedia Availability**: Available in Macedonian, Serbo-Croatian, and Serbian

## FAQs
### Q: What was Cosmos 866?
A: Cosmos 866 was a Soviet satellite launched on November 11, 1976, as part of the Zenit-4MK class. It was launched using a Soyuz-U rocket from the Baikonur Cosmodrome.

### Q: When and where was Cosmos 866 launched?
A: Cosmos 866 was launched on November 11, 1976, at 10:45:00 UTC from Baikonur Cosmodrome Site 31.

### Q: What type of satellite was Cosmos 866?
A: Cosmos 866 was an instance of the Zenit-4MK satellite class, which was a Soviet satellite design.

### Q: What was the COSPAR ID of Cosmos 866?
A: The COSPAR ID of Cosmos 866 is 1976-110A.

### Q: What was the launch vehicle for Cosmos 866?
A: The launch vehicle for Cosmos 866 was the Soyuz-U, a variant of the Soyuz rocket design.

## Why It Matters
Cosmos 866 represents a significant entry in the Soviet space program's satellite launches during the 1970s. As part of the Zenit-4MK class, it contributed to the Soviet Union's efforts in space exploration and satellite deployment. The launch from Baikonur Cosmodrome Site 31 highlights the strategic importance of this site in Soviet space operations. The satellite's classification and COSPAR ID provide context for its role in the broader satellite catalog maintained by international space agencies. While specific details about its mission or payload are not provided, its inclusion in the Zenit-4MK series underscores its place in the evolution of Soviet satellite technology.

## Notable For
- **First Launch of Zenit-4MK Class**: Cosmos 866 was one of the first satellites in the Zenit-4MK series, marking an early milestone in Soviet satellite development.
- **Soyuz-U Launch Vehicle**: The use of the Soyuz-U rocket demonstrates the reliability and versatility of this launch vehicle in deploying Soviet satellites.
- **Baikonur Cosmodrome Site 31**: The launch from Site 31 highlights the strategic significance of this location in Soviet space operations.
- **COSPAR ID Assignment**: The assignment of COSPAR ID 1976-110A ensures Cosmos 866 is cataloged and tracked by international space agencies.
- **Wikipedia Availability**: The presence of Cosmos 866 in Wikipedia in multiple languages (Macedonian, Serbo-Croatian, Serbian) indicates its historical and cultural relevance.

## Body
### Launch Details
Cosmos 866 was launched on **November 11, 1976**, at **10:45:00 UTC** from **Baikonur Cosmodrome Site 31**. The launch vehicle used was the **Soyuz-U**, a variant of the Soyuz rocket design developed by the Soviet Union.

### Satellite Classification
Cosmos 866 is classified under the **Zenit-4MK** satellite class, which was a series of Soviet satellites. The **SCN (Space Catalog Number)** assigned to Cosmos 866 is **09532**, and its **COSPAR ID** is **1976-110A**.

### Country of Origin
The satellite was launched by the **Soviet Union**, as indicated by the country of origin in the source material.

### Wikipedia Availability
Cosmos 866 has Wikipedia entries available in **Macedonian (mk)**, **Serbo-Croatian (sh)**, and **Serbian (sr)**, reflecting its historical and cultural significance in these regions.

### Related Entities
- **Zenit-4MK**: The satellite class to which Cosmos 866 belongs.
- **Soyuz-U**: The launch vehicle used to deploy Cosmos 866.

## References

1. Jonathan's Space Report