# Salyut 7

> space station launched on 19 April 1982

**Wikidata**: [Q904503](https://www.wikidata.org/wiki/Q904503)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Salyut_7)  
**Source**: https://4ort.xyz/entity/salyut-7

Here’s the structured knowledge entry for **Salyut 7**:

---

## Summary  
Salyut 7 was a Soviet space station launched on 19 April 1982, designed for long-term human habitation in orbit. It succeeded Salyut 6 and was part of the Salyut programme, serving as a precursor to modular space stations like Mir. The station reentered Earth's atmosphere uncontrolled on 7 February 1991 after completing 51,917 orbits.

## Key Facts  
- **Launch date**: 19 April 1982 ([reference](https://www.wikidata.org/wiki/Q6272367))  
- **Launch vehicle**: Proton-K rocket from Baikonur Cosmodrome Site 200  
- **Mass**: 19,824 kg  
- **Length**: 16 meters  
- **Orbital parameters**: Apoapsis 375 km, periapsis 219 km, inclination 51.6 degrees  
- **Crew capacity**: Designed for extended stays by cosmonauts  
- **Preceded by**: Salyut 6  
- **Reentry**: Uncontrolled reentry on 7 February 1991  
- **Orbits completed**: 51,917  
- **COSPAR ID**: 1982-033A  

## FAQs  
### Q: How long was Salyut 7 operational?  
A: Salyut 7 operated for nearly nine years, from its launch in 1982 until its uncontrolled reentry in 1991.  

### Q: What was Salyut 7's purpose?  
A: It served as a crewed space station for scientific experiments, Earth observation, and testing long-duration spaceflight capabilities.  

### Q: Did Salyut 7 have any notable missions?  
A: Yes, it hosted multiple crews, including missions to repair the station after a power failure in 1985, demonstrating in-space repair techniques.  

## Why It Matters  
Salyut 7 was a critical milestone in space station technology, bridging the gap between earlier single-module stations and later modular designs like Mir and the International Space Station (ISS). Its extended operational life and ability to support long-duration missions provided valuable data on human adaptation to microgravity, station maintenance, and orbital logistics. The station's uncontrolled reentry also highlighted challenges in managing defunct spacecraft, influencing future deorbiting protocols.  

## Notable For  
- **Longevity**: One of the longest-operating space stations of its era.  
- **Repair mission**: Successfully revived after a power failure, proving in-space repair feasibility.  
- **Precursor to Mir**: Directly influenced the design of the modular Mir station.  
- **High orbit count**: Completed over 51,000 orbits around Earth.  

## Body  
### Launch and Design  
- Launched on **19 April 1982** via Proton-K rocket.  
- Mass: **19,824 kg**, length: **16 meters**.  
- Orbital altitude: **219–375 km**, inclination: **51.6 degrees**.  

### Operational History  
- Hosted multiple crews for extended missions.  
- Suffered a power failure in **1985** but was repaired by a crew sent via Soyuz T-13.  
- Deorbited **7 February 1991**, burning up over South America.  

### Technical Specifications  
- Part of the **Salyut programme**, succeeding Salyut 6.  
- Equipped with docking ports for resupply and crew transfers.  
- Conducted experiments in materials science, biology, and Earth observation.  

### Legacy  
- Demonstrated the viability of long-term space habitation.  
- Paved the way for modular station designs like **Mir** and the **ISS**.  

--- 

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
2. Freebase Data Dumps. 2013
3. BabelNet