# Cosmos 91
**Wikidata**: [Q11744085](https://www.wikidata.org/wiki/Q11744085)  
**Source**: https://4ort.xyz/entity/cosmos-91

## Summary
Cosmos 91 was a Soviet reconnaissance satellite launched on September 23, 1965, as part of the Zenit-4 series. It was launched from the Baikonur Cosmodrome using a Voskhod rocket, marking another mission in the Soviet Union's early reconnaissance satellite program.

## Key Facts
- **Launch Date**: September 23, 1965
- **Launch Vehicle**: Voskhod
- **Launch Site**: Baikonur Cosmodrome Site 31
- **Satellite Class**: Zenit-4
- **COSPAR ID**: 1965-075A
- **Country of Origin**: Soviet Union
- **Instance of**: Zenit-4 reconnaissance satellite
- **Wikipedia Availability**: Available in Hungarian, Macedonian, Polish, Serbo-Croatian, and Serbian

## FAQs
### Q: What was Cosmos 91?
A: Cosmos 91 was a Soviet reconnaissance satellite launched on September 23, 1965, as part of the Zenit-4 series. It was used for military surveillance and was launched from the Baikonur Cosmodrome.

### Q: Which rocket launched Cosmos 91?
A: Cosmos 91 was launched using a Voskhod rocket from the Baikonur Cosmodrome Site 31.

### Q: What was the purpose of Cosmos 91?
A: Cosmos 91 was a reconnaissance satellite designed for military surveillance, part of the Soviet Union's early satellite-based intelligence program.

### Q: How is Cosmos 91 classified?
A: Cosmos 91 is classified as a Zenit-4 reconnaissance satellite, part of the Soviet Union's early satellite series.

### Q: Where can I find more information about Cosmos 91?
A: Detailed information is available in Wikipedia articles in Hungarian, Macedonian, Polish, Serbo-Croatian, and Serbian.

## Why It Matters
Cosmos 91 was part of the Soviet Union's early reconnaissance satellite program, which played a crucial role in military intelligence gathering. Launched in 1965, it was one of several Zenit-4 satellites deployed to provide real-time imagery and data for strategic purposes. The mission demonstrated the Soviet Union's capability to conduct space-based surveillance, contributing to its Cold War-era technological advancements. While not as widely publicized as crewed missions, Cosmos 91 was a key component of the Soviet space program's reconnaissance efforts, reflecting the era's competitive space race dynamics.

## Notable For
- **First Zenit-4 Launch**: One of the earliest missions in the Zenit-4 reconnaissance satellite series.
- **Military Surveillance**: Contributed to the Soviet Union's early satellite-based intelligence gathering.
- **Voskhod Rocket Use**: Marked the use of the Voskhod rocket for reconnaissance satellite launches.
- **Cold War Era**: Operated during the height of the Cold War, reinforcing Soviet space capabilities.
- **Limited Public Data**: Due to its military nature, detailed technical specifications remain scarce.

## Body
### Mission Overview
Cosmos 91 was launched on September 23, 1965, from the Baikonur Cosmodrome Site 31 using a Voskhod rocket. It was part of the Zenit-4 series of reconnaissance satellites, designed for military surveillance. The satellite was assigned the COSPAR ID 1965-075A, indicating its classification and launch sequence.

### Technical Specifications
- **Satellite Class**: Zenit-4
- **Launch Vehicle**: Voskhod
- **Launch Site**: Baikonur Cosmodrome Site 31
- **Launch Time**: 09:00:00 UTC on September 23, 1965

### Significance
Cosmos 91 was a critical mission in the Soviet Union's reconnaissance satellite program, contributing to its early efforts in space-based intelligence. The Zenit-4 series, of which Cosmos 91 was a part, was instrumental in providing real-time imagery and data for military purposes. The mission highlights the Soviet Union's advancements in space technology during the Cold War era.

### Availability
Detailed information about Cosmos 91 is available in Wikipedia articles in multiple languages, including Hungarian, Macedonian, Polish, Serbo-Croatian, and Serbian. The satellite's military nature has limited public access to technical details, but its role in the Soviet space program remains documented.

## References

1. Jonathan's Space Report