# Cosmos 636
**Wikidata**: [Q12907761](https://www.wikidata.org/wiki/Q12907761)  
**Source**: https://4ort.xyz/entity/cosmos-636

## Summary
Cosmos 636 (also known as Kosmos 636) was a Zenit-4MK satellite launched on March 20, 1974 from Baikonur Cosmodrome using a Soyuz-U rocket.

## Key Facts
- It was launched on March 20, 1974
- Its launch site was Baikonur Cosmodrome Site 31
- The launch vehicle was a Soyuz-U rocket
- Its COSPAR ID is 1974-016A
- It belongs to the Zenit-4MK class
- It has the international designation Kosmos 636
- It was launched using a Soyuz-U rocket design variant

## FAQs
### Q: What was Cosmos 636?
A: Cosmos 636 was a Zenit-4MK satellite launched by the Soviet Union on March 20, 1974.

### Q: When was Cosmos 636 launched?
A: It was launched on March 20, 1974.

### Q: What rocket launched Cosmos 636?
A: It was launched using a Soyuz-U rocket.

## Why It Matters
Cosmos 636 represents a typical Soviet satellite from the 1970s, illustrating the technological capabilities and space program priorities of the Soviet Union during that period. As a Zenit-4MK satellite, it was part of the Soviet Union's efforts to develop and deploy reconnaissance satellites, contributing to their space surveillance capabilities and military strategic objectives. The launch demonstrates the Soviet Union's continued investment in space technology and its role in the Cold War space race.

## Notable For
- It was launched as part of the Zenit-4MK satellite series
- It utilized the Soyuz-U rocket as its launch vehicle
- It represents a specific COSPAR ID (1974-016A)
- It was launched from Baikonur Cosmodrome, a major Soviet space launch facility
- It had the international designation Kosmos 636

## Body
### Technical Specifications
Cosmos 636 was classified as a Zenit-4MK satellite, which was a type of reconnaissance satellite developed by the Soviet Union. The Zenit-4MK series was part of the broader Zenit program that focused on optical reconnaissance capabilities.

### Launch Details
The satellite was launched on March 20, 1974 at 08:30:00 from Baikonur Cosmodrome Site 31. The launch was conducted using a Soyuz-U rocket, which was a variant of the Soyuz rocket design.

### Classification and Designation
The satellite has the international designation Kosmos 636 and the COSPAR ID 1974-016A. It belongs to the Zenit-4MK class of satellites and was launched as part of the Soviet Union's space program. The Zenit-4MK represented an improved version of the earlier Zenit-4 satellite, featuring enhanced capabilities for reconnaissance missions.

## References

1. Jonathan's Space Report