# Interkosmos 5

> former Soviet ionospheric research satellite

**Wikidata**: [Q1097427](https://www.wikidata.org/wiki/Q1097427)  
**Source**: https://4ort.xyz/entity/interkosmos-5

## Summary
Interkosmos 5 was a former Soviet ionospheric research satellite launched on December 2, 1971, as part of the Dnepropetrovsk Sputnik family. It was designed to study the Earth's ionosphere and operated under the Interkosmos program, a collaborative initiative between the Soviet Union and other Eastern Bloc countries.

## Key Facts
- **Launch Date**: December 2, 1971, at 08:25:14 UTC from Kapustin Yar.
- **Mass**: 340 kilograms.
- **Satellite Class**: DC-U2-IK, part of the Dnepropetrovsk Sputnik family.
- **Operator**: Interkosmos, a Soviet space research program.
- **Launch Vehicle**: Kosmos-2I, a superseded Soviet carrier rocket.
- **Manufacturer**: Pivdenne Design Office.
- **Spacecraft Bus**: DS-U2.
- **Country of Origin**: Soviet Union.
- **COSPAR ID**: 1971-104A.
- **Decay Date**: April 7, 1972, marking the end of its operational life.

## FAQs
### Q: What was the purpose of Interkosmos 5?
A: Interkosmos 5 was an ionospheric research satellite designed to study the Earth's ionosphere, contributing to scientific understanding of atmospheric layers.

### Q: Who operated Interkosmos 5?
A: The satellite was operated under the Interkosmos program, a collaborative Soviet space research initiative involving Eastern Bloc countries.

### Q: What was the launch vehicle for Interkosmos 5?
A: The satellite was launched using the Kosmos-2I carrier rocket from Kapustin Yar on December 2, 1971.

### Q: How long did Interkosmos 5 remain in orbit?
A: Interkosmos 5 decayed from orbit on April 7, 1972, after approximately four months in space.

### Q: What was the mass of Interkosmos 5?
A: The satellite had a mass of 340 kilograms.

## Why It Matters
Interkosmos 5 played a crucial role in advancing ionospheric research, contributing to the broader scientific understanding of Earth's atmospheric layers. As part of the Interkosmos program, it facilitated collaboration between the Soviet Union and other Eastern Bloc nations, sharing data and resources in space exploration. The satellite's operational lifespan, from launch to decay, provided valuable data for atmospheric studies, enhancing knowledge of ionospheric dynamics. Its legacy lies in the collaborative efforts that defined the era of Soviet space research and international cooperation in scientific endeavors.

## Notable For
- **Ionospheric Research**: Pioneered studies of the Earth's ionosphere, a critical layer for radio communication and space weather.
- **Interkosmos Collaboration**: Demonstrated the Soviet Union's commitment to international space research through the Interkosmos program.
- **DS-U2 Platform**: Utilized the DS-U2 spacecraft bus, a common design for Soviet ionospheric satellites.
- **Kosmos-2I Launch**: Marked the use of the Kosmos-2I rocket, a reliable but later superseded carrier.
- **Short Operational Lifespan**: Decayed quickly, typical of early Soviet research satellites with limited onboard resources.

## Body
### Overview
Interkosmos 5 was a Soviet ionospheric research satellite launched on December 2, 1971, as part of the Dnepropetrovsk Sputnik family. It was operated by the Interkosmos program, a collaborative initiative between the Soviet Union and other Eastern Bloc countries. The satellite was designed to study the Earth's ionosphere, contributing to scientific understanding of atmospheric layers.

### Technical Specifications
- **Mass**: 340 kilograms.
- **Spacecraft Bus**: DS-U2, a common design for Soviet ionospheric satellites.
- **Launch Vehicle**: Kosmos-2I, a superseded Soviet carrier rocket.
- **Manufacturer**: Pivdenne Design Office, a key Soviet aerospace design bureau.

### Mission Details
- **Launch Date**: December 2, 1971, at 08:25:14 UTC from Kapustin Yar.
- **COSPAR ID**: 1971-104A.
- **Decay Date**: April 7, 1972, marking the end of its operational life.

### Significance
Interkosmos 5 was part of the broader Interkosmos program, which aimed to share space research data among Eastern Bloc nations. The satellite's mission contributed to atmospheric science, particularly in ionospheric studies, which are essential for understanding radio communication and space weather. Its relatively short operational lifespan was typical for early Soviet research satellites, which often had limited onboard resources and shorter lifespans compared to later missions.

## References

1. Jonathan's Space Report
2. [Source](https://space.skyrocket.de/doc_sdat/interkosmos-3.htm)
3. [Source](https://www.n2yo.com/satellite/?s=05641)