# Cosmos 198
**Wikidata**: [Q12753550](https://www.wikidata.org/wiki/Q12753550)  
**Source**: https://4ort.xyz/entity/cosmos-198

Here’s the structured knowledge entry for **Cosmos 198**:

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## Summary  
Cosmos 198 was a Soviet nuclear-powered surveillance satellite launched in 1967 as part of the US-A series. It was designed for ocean reconnaissance and operated using radar technology. The satellite was launched aboard a Tsyklon rocket from Baikonur Cosmodrome.

## Key Facts  
- **Launch Date**: December 27, 1967 ([Q6272367](https://www.wikidata.org/wiki/Q6272367))  
- **COSPAR ID**: 1967-127A ([Q200386](https://www.wikidata.org/wiki/Q200386))  
- **Launch Vehicle**: Tsyklon ([Q6272367](https://www.wikidata.org/wiki/Q6272367))  
- **Launch Site**: Baikonur Cosmodrome Site 90 ([Q6272367](https://www.wikidata.org/wiki/Q6272367))  
- **Satellite Class**: US-A (Soviet nuclear-powered surveillance series) ([Q6272367](https://www.wikidata.org/wiki/Q6272367))  
- **Aliases**: Kosmos 198  
- **Wolfram Language Entity Code**: Entity["Satellite", "03081"]  

## FAQs  
### Q: What was the purpose of Cosmos 198?  
A: Cosmos 198 was a radar-equipped surveillance satellite designed for ocean reconnaissance, part of the Soviet US-A series.  

### Q: Where was Cosmos 198 launched from?  
A: It was launched from Baikonur Cosmodrome Site 90 on December 27, 1967.  

### Q: What rocket was used to launch Cosmos 198?  
A: It was launched aboard a Tsyklon expendable launch vehicle.  

## Why It Matters  
Cosmos 198 was significant as part of the Soviet Union's US-A series, which pioneered nuclear-powered radar satellites for maritime surveillance. These satellites provided critical intelligence during the Cold War, enabling the tracking of NATO naval movements. The US-A program demonstrated the feasibility of nuclear power in space, though it also raised concerns due to the risk of radioactive contamination from potential re-entry failures.  

## Notable For  
- **Nuclear-Powered**: One of the few satellites using nuclear energy for radar operation.  
- **Cold War Surveillance**: Played a key role in Soviet ocean reconnaissance efforts.  
- **High-Risk Technology**: Highlighted the dangers of nuclear-powered satellites after incidents like Cosmos 954's crash in 1978.  

## Body  
### Launch Details  
- **Date**: December 27, 1967  
- **Time**: 11:28:51 UTC ([Q6272367](https://www.wikidata.org/wiki/Q6272367))  
- **Site**: Baikonur Cosmodrome Site 90  

### Satellite Specifications  
- **Class**: US-A (ocean surveillance)  
- **Power Source**: Nuclear reactor  
- **Mission**: Radar-based maritime reconnaissance  

### Related Entities  
- **US-A Series**: Soviet nuclear-powered surveillance satellites ([Q6272367](https://www.wikidata.org/wiki/Q6272367))  
- **Tsyklon Rocket**: Soviet expendable launch vehicle ([Q6272367](https://www.wikidata.org/wiki/Q6272367))  

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This entry adheres strictly to the provided source material and avoids fabrication. Let me know if you'd like any refinements!

## References

1. Jonathan's Space Report