# Kosmos 423

> Soviet satellite

**Wikidata**: [Q53540](https://www.wikidata.org/wiki/Q53540)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Kosmos_423)  
**Source**: https://4ort.xyz/entity/kosmos-423

## Summary  
Kosmos 423 was a Soviet satellite launched in 1971 as part of the DS-P1-Yu series, designed for radar calibration and space research. It was launched aboard a Kosmos-2I rocket from the Plesetsk Cosmodrome and re-entered Earth's atmosphere later that year.  

## Key Facts  
- **Launch Date**: May 27, 1971 (11:59:55 UTC)  
- **COSPAR ID**: 1971-047A  
- **Launch Vehicle**: Kosmos-2I rocket  
- **Launch Site**: Plesetsk Cosmodrome, Site 133  
- **Manufacturer**: Pivdenne Design Office  
- **Satellite Class**: DS-P1-Yu (DSZ–P1–Ju)  
- **Re-entry Date**: November 26, 1971  
- **Aliases**: DS-P1-Yu No.47, Kosmos 423  
- **Wolfram Entity Code**: Entity["Satellite", "05246"]  

## FAQs  
### Q: What was the purpose of Kosmos 423?  
A: Kosmos 423 was part of the DS-P1-Yu series, primarily used for radar calibration and space research by the Soviet Union.  

### Q: Where was Kosmos 423 launched from?  
A: It was launched from Plesetsk Cosmodrome's Site 133 in northern Russia.  

### Q: How long did Kosmos 423 remain in orbit?  
A: It orbited Earth for approximately six months before re-entering the atmosphere on November 26, 1971.  

## Why It Matters  
Kosmos 423 was a significant part of the Soviet Union's Cold War-era space program, contributing to radar calibration and military research. Its launch demonstrated the reliability of the Kosmos-2I rocket and the Plesetsk Cosmodrome's role as a key launch site. The DS-P1-Yu series, including Kosmos 423, provided critical data for Soviet defense and space exploration efforts, showcasing the USSR's technological capabilities during the space race.  

## Notable For  
- **Radar Calibration**: Part of the DS-P1-Yu series, designed for calibrating Soviet radar systems.  
- **Short Orbital Lifespan**: Operated for only six months before re-entry.  
- **Soviet Space Program**: Highlighted the USSR's focus on dual-use (military and scientific) satellite technology.  

## Body  
### Launch Details  
- **Date**: May 27, 1971  
- **Time**: 11:59:55 UTC  
- **Launch Vehicle**: Kosmos-2I (a superseded Soviet carrier rocket)  
- **Site**: Plesetsk Cosmodrome, Site 133  

### Satellite Specifications  
- **Class**: DS-P1-Yu (DSZ–P1–Ju)  
- **Manufacturer**: Pivdenne Design Office  
- **Mission Duration**: ~6 months (re-entered November 26, 1971)  

### Identification  
- **COSPAR ID**: 1971-047A  
- **Aliases**: DS-P1-Yu No.47, Kosmos 423  
- **Wolfram Code**: Entity["Satellite", "05246"]  

### Significant Events  
- **Launch**: Occurred at Plesetsk Cosmodrome Site 133.  
- **Re-entry**: Marked the end of its mission on November 26, 1971.

## References

1. Jonathan's Space Report
2. Freebase Data Dumps. 2013