# Cosmos 1739
**Wikidata**: [Q12753427](https://www.wikidata.org/wiki/Q12753427)  
**Source**: https://4ort.xyz/entity/cosmos-1739

## Summary
Cosmos 1739 was a Soviet reconnaissance satellite launched in 1986 as part of the Yantar-4K2 class, designed for photographic intelligence gathering. It was deployed using a Soyuz-U rocket from Baikonur Cosmodrome, serving as part of the Soviet Union's Cold War-era surveillance capabilities.

## Key Facts
- **SCN**: 16677
- **COSPAR ID**: 1986-028A
- **Launch Date**: April 9, 1986
- **Launch Vehicle**: Soyuz-U rocket
- **Class**: Yantar-4K2 (Soviet/Russian spy satellite)
- **Launch Site**: Baikonur Cosmodrome Site 31
- **Mission Type**: Photographic reconnaissance

## FAQs
### Q: What was the purpose of Cosmos 1739?
A: Cosmos 1739 was a Soviet spy satellite designed for photographic intelligence gathering as part of the Yantar-4K2 class, supporting military reconnaissance during the Cold War.

### Q: When and where was Cosmos 1739 launched?
A: It launched on April 9, 1986, at 08:00:00 UTC from Baikonur Cosmodrome Site 31 in the Soviet Union.

### Q: What rocket was used to deploy Cosmos 1739?
A: The satellite was launched using a Soyuz-U rocket, a reliable variant of the Soyuz design used for military and civilian missions.

## Why It Matters
Cosmos 1739 represents a key component of the Soviet Union’s Cold War reconnaissance efforts. As part of the Yantar-4K2 series, it provided critical photographic intelligence, enabling strategic military planning and surveillance. The use of the Soyuz-U rocket underscores the Soviet space program’s emphasis on reliability and cost-effectiveness for frequent launches. Satellites like Cosmos 1739 played a pivotal role in maintaining Soviet geopolitical interests, demonstrating the intersection of space technology and national security during the 1980s.

## Notable For
- **Yantar-4K2 Class**: Part of a specialized reconnaissance satellite series with film-return capsules for high-resolution imagery.
- **Soyuz-U Launch Vehicle**: Utilized a widely used and dependable rocket variant, highlighting Soviet launch system standardization.
- **Baikonur Cosmodrome Launch**: Originated from a historic Soviet spaceport, reflecting the centralized infrastructure of the USSR’s space program.

## Body
### Launch Details
- **Date/Time**: April 9, 1986, at 08:00:00 UTC
- **Site**: Baikonur Cosmodrome Site 31
- **Vehicle**: Soyuz-U (Universal variant)

### Satellite Class
- **Type**: Yantar-4K2
- **Function**: Photographic reconnaissance with film-return capsules
- **Origin**: Soviet/Russian design for military intelligence

### Mission Purpose
- **Primary Role**: Cold War-era surveillance and imagery collection
- **Operational Context**: Contributed to Soviet strategic monitoring of adversaries and global hotspots

### Operational Timeline
- **Launch**: 1986
- **Design Life**: Typical Yantar-4K2 missions lasted approximately 60 days, after which film capsules were recovered mid-air

### Technical Specifications
- **Identifiers**: SCN 16677, COSPAR ID 1986-028A
- **Launch Vehicle**: Soyuz-U, a derivative of the R-7 rocket family

## References

1. Jonathan's Space Report