# Kosmos 20

> Soviet optical film-return reconnaissance satellite

**Wikidata**: [Q1119594](https://www.wikidata.org/wiki/Q1119594)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Kosmos_20)  
**Source**: https://4ort.xyz/entity/kosmos-20

## Summary
Kosmos 20 was a Soviet optical film-return reconnaissance satellite launched on October 18, 1963, as part of the Zenit-2 class. It was designed to capture high-resolution imagery for military and intelligence purposes before re-entering the atmosphere on October 26, 1963.

## Key Facts
- **Launch Date**: October 18, 1963, from Gagarin's Start using a Vostok-2 rocket.
- **Mass**: 4,730 kilograms.
- **Orbital Parameters**:
  - Apoapsis: 311 kilometers.
  - Periapsis: 206 kilometers.
  - Orbital inclination: 65 degrees.
  - Orbital period: 89.55 minutes.
- **Decay Date**: October 26, 1963, after completing its mission.
- **Manufacturer**: S.P. Korolev Rocket and Space Corporation Energia.
- **Class**: Zenit-2, a Soviet reconnaissance satellite series.
- **COSPAR ID**: 1963-040A.

## FAQs
### Q: What was the purpose of Kosmos 20?
A: Kosmos 20 was a Soviet reconnaissance satellite designed to capture high-resolution optical imagery for military and intelligence purposes before returning its film payload to Earth.

### Q: How was Kosmos 20 launched?
A: It was launched on October 18, 1963, from Gagarin's Start using a Vostok-2 rocket.

### Q: How long did Kosmos 20 remain in orbit?
A: Kosmos 20 decayed from orbit on October 26, 1963, after completing its mission.

### Q: What was the orbital inclination of Kosmos 20?
A: The satellite had an orbital inclination of 65 degrees.

### Q: Who manufactured Kosmos 20?
A: Kosmos 20 was manufactured by S.P. Korolev Rocket and Space Corporation Energia.

## Why It Matters
Kosmos 20 was a critical component of the Soviet Union's early reconnaissance satellite program, demonstrating the feasibility of optical film-return missions. Its successful launch and mission contributed to the development of more advanced reconnaissance satellites, including the Zenit series. The satellite's ability to capture high-resolution imagery from space provided valuable intelligence for military and strategic purposes. Its relatively short orbital lifespan, however, highlighted the challenges of maintaining long-term reconnaissance capabilities in the early space age.

## Notable For
- **First of its Class**: Kosmos 20 was the first satellite in the Zenit-2 series, paving the way for subsequent missions.
- **Film-Return Technology**: It pioneered the use of optical film-return for reconnaissance, a method later refined in other satellites.
- **Military Intelligence**: The satellite's imagery was used for strategic and tactical military purposes, supporting Soviet intelligence operations.
- **Orbital Decay**: Its rapid decay from orbit demonstrated the need for more stable reconnaissance satellite designs.

## Body
### Mission Overview
Kosmos 20 was launched on October 18, 1963, from Gagarin's Start using a Vostok-2 rocket. The satellite was part of the Zenit-2 class, a series of Soviet reconnaissance satellites designed to capture high-resolution optical imagery. The satellite had a mass of 4,730 kilograms and operated in a low Earth orbit with an apoapsis of 311 kilometers and a periapsis of 206 kilometers. Its orbital inclination was 65 degrees, and it completed an orbit every 89.55 minutes.

### Mission Duration
Kosmos 20 completed its mission and re-entered the atmosphere on October 26, 1963. Its relatively short operational lifespan highlighted the challenges of maintaining long-term reconnaissance capabilities in the early space age.

### Significance
Kosmos 20 played a pivotal role in the Soviet Union's early reconnaissance satellite program. Its successful launch and mission demonstrated the feasibility of optical film-return for intelligence gathering, contributing to the development of more advanced reconnaissance satellites. The satellite's imagery was used for military and strategic purposes, supporting Soviet intelligence operations.

### Technological Achievements
Kosmos 20 was notable for its use of film-return technology, which was later refined in other reconnaissance satellites. Its design and mission parameters provided valuable insights into the capabilities and limitations of early reconnaissance satellites. The satellite's rapid decay from orbit also highlighted the need for more stable and long-lasting reconnaissance satellite designs.

## References

1. Jonathan's Space Report