# Cosmos 1677
**Wikidata**: [Q13217350](https://www.wikidata.org/wiki/Q13217350)  
**Source**: https://4ort.xyz/entity/cosmos-1677

## Summary
Cosmos 1677 was a Soviet nuclear-powered surveillance satellite launched in 1985 as part of the US-A series. It was designed for maritime reconnaissance and operated using radar technology. The satellite was launched aboard a Tsyklon-2 rocket from the Baikonur Cosmodrome.

## Key Facts
- **Launch Date**: August 23, 1985 ([reference](https://www.wikidata.org/wiki/Q6272367))  
- **COSPAR ID**: 1985-075A ([reference](https://www.wikidata.org/wiki/Q200386))  
- **Launch Vehicle**: Tsyklon-2 ([reference](https://www.wikidata.org/wiki/Q6272367))  
- **Launch Site**: Baikonur Cosmodrome Site 90 ([reference](https://www.wikidata.org/wiki/Q6272367))  
- **Satellite Catalog Number**: 15986 ([reference](https://www.wikidata.org/wiki/Q6272367))  
- **Aliases**: Kosmos 1677  
- **Class**: US-A (Soviet nuclear-powered surveillance satellite series)  
- **Significant Event**: Rocket launch at 22:33 UTC on August 23, 1985 ([reference](https://www.wikidata.org/wiki/Q6272367))  

## FAQs
### Q: What was the purpose of Cosmos 1677?  
A: Cosmos 1677 was a Soviet nuclear-powered radar reconnaissance satellite designed for maritime surveillance, tracking naval movements.  

### Q: What rocket launched Cosmos 1677?  
A: It was launched aboard a Tsyklon-2 rocket, a Soviet/Ukrainian expendable launch vehicle.  

### Q: Where was Cosmos 1677 launched from?  
A: It was launched from Site 90 at the Baikonur Cosmodrome in Kazakhstan.  

## Why It Matters  
Cosmos 1677 was part of the US-A series, a critical Soviet program for maritime reconnaissance during the Cold War. These satellites used nuclear power to operate radar systems, enabling all-weather surveillance of naval fleets, particularly NATO vessels. The program demonstrated Soviet advancements in space-based nuclear technology, though it also raised concerns due to the risk of radioactive debris from potential malfunctions. Cosmos 1677's launch contributed to the strategic balance of power by enhancing the USSR's ability to monitor global maritime activity.  

## Notable For  
- **Nuclear-Powered**: One of few satellites using nuclear reactors for radar operation.  
- **Cold War Significance**: Played a key role in Soviet naval reconnaissance efforts.  
- **Launch Vehicle**: Used the Tsyklon-2, a reliable Soviet-era rocket.  

## Body  
### Launch Details  
- **Date**: August 23, 1985  
- **Time**: 22:33 UTC  
- **Site**: Baikonur Cosmodrome Site 90  

### Technical Specifications  
- **Catalog Number**: 15986  
- **COSPAR Designation**: 1985-075A  
- **Class**: US-A (active radar reconnaissance)  

### Related Entities  
- **US-A Series**: Soviet nuclear-powered satellites for maritime surveillance.  
- **Tsyklon-2 Rocket**: Used for launching payloads into low Earth orbit.

## References

1. Jonathan's Space Report