# Explorer 43

> American satellite

**Wikidata**: [Q11984838](https://www.wikidata.org/wiki/Q11984838)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Explorer_43)  
**Source**: https://4ort.xyz/entity/explorer-43

## Summary
Explorer 43 was an American satellite launched on March 13, 1971, from Cape Canaveral Space Launch Complex 17 aboard a Thor-Delta launch vehicle. It was part of NASA's Explorer program and carried the IMP-I (Interplanetary Monitoring Platform) payload to study the space environment between Earth and the Moon.

## Key Facts
- Launch date: March 13, 1971
- Launch site: Cape Canaveral Space Launch Complex 17
- Launch vehicle: Thor-Delta
- Spacecraft type: Explorer 43 IMP-I
- Mission: Interplanetary Monitoring Platform
- Spacecraft ID: 05043
- COSPAR ID: 1971-019A
- NSSDCA ID: 1971-019A
- Wikipedia title: Explorer 43
- Commons category: Explorer 43 IMP-I
- Available in 5 Wikipedia languages: English, Galician, Kazakh, Portuguese, and Commons

## FAQs
### Q: What was Explorer 43's mission?
A: Explorer 43 was an American satellite launched in 1971 to study the space environment between Earth and the Moon as part of NASA's Interplanetary Monitoring Platform program.

### Q: When and where was Explorer 43 launched?
A: Explorer 43 was launched on March 13, 1971, from Cape Canaveral Space Launch Complex 17 in Florida.

### Q: What type of launch vehicle was used for Explorer 43?
A: Explorer 43 was launched aboard a Thor-Delta rocket, which was an American expendable launch system.

## Why It Matters
Explorer 43 represented an important step in NASA's efforts to understand the space environment beyond Earth's immediate vicinity. As part of the Interplanetary Monitoring Platform series, it provided crucial data about the region between Earth and the Moon, helping scientists better understand solar wind, cosmic rays, and other space phenomena that affect both spacecraft and potential human missions. The satellite's measurements contributed to our knowledge of how Earth's magnetosphere interacts with the solar wind and helped improve space weather forecasting capabilities. This mission was particularly significant as it occurred during a period of intense space exploration activity, providing valuable context for both robotic and human spaceflight operations.

## Notable For
- First IMP satellite to provide continuous monitoring of the Earth-Moon space region
- Part of NASA's long-running Explorer program that began in 1958
- Carried sophisticated instruments to measure magnetic fields and particle fluxes
- Operated during a period of increased interest in cislunar space exploration
- Provided data that helped improve understanding of the magnetotail region

## Body
### Technical Specifications
Explorer 43 was a spin-stabilized spacecraft with a cylindrical body design typical of IMP satellites. The satellite carried instruments to measure magnetic fields, energetic particles, and plasma in the space environment between Earth and the Moon.

### Mission Objectives
The primary scientific goals included studying the interaction between the solar wind and Earth's magnetosphere, monitoring cosmic rays, and measuring the properties of the magnetotail region. The satellite's orbit allowed it to sample different regions of the Earth-Moon space environment as it traveled through its trajectory.

### Instrumentation
The IMP-I payload included magnetometers, particle detectors, and plasma analyzers designed to provide comprehensive measurements of the space environment. These instruments helped create a more complete picture of the electromagnetic and particle conditions in cislunar space.

### Operational History
After its successful launch on March 13, 1971, Explorer 43 began its mission to monitor the space environment. The satellite's data contributed to multiple scientific studies and helped improve models of space weather and magnetospheric dynamics.

### Legacy
The data collected by Explorer 43 helped establish baseline measurements for the Earth-Moon space region and contributed to the planning of future missions in cislunar space. Its findings remain relevant to current studies of space weather and its effects on both spacecraft and potential human exploration beyond Earth orbit.

## References

1. Jonathan's Space Report