# Explorer 18

> satellite statunitense appartenente al Programma Explorer

**Wikidata**: [Q1174215](https://www.wikidata.org/wiki/Q1174215)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Explorer_18)  
**Source**: https://4ort.xyz/entity/explorer-18

## Summary
Explorer 18 is a U.S. satellite launched as part of the Explorer program on November 27, 1963, from Cape Canaveral Space Launch Complex 17 aboard a Delta C rocket. It is also known by the aliases IMP-A and IMP-1, reflecting its role in early interplanetary missions.

## Key Facts
- Launched on November 27, 1963, from Cape Canaveral Space Launch Complex 17.
- Part of the Explorer program, a series of U.S. scientific satellites.
- Launched aboard a Delta C expendable launch vehicle.
- Also known by the aliases IMP-A and IMP-1.
- COSPAR ID: 1963-046A.
- SCN (Satellite Catalog Number): 00693.
- Classified as a spacecraft.
- Wikipedia title: Explorer 18.
- Available in multiple language editions of Wikipedia, including Italian, German, and French.
- Wikidata description: "satellite statunitense appartenente al Programma Explorer."

## FAQs
- **What was Explorer 18's primary mission?** Explorer 18 was part of the Explorer program, which focused on conducting scientific experiments in space. Its specific mission details are not provided in the source material.
- **Which launch vehicle carried Explorer 18?** The Delta C rocket launched Explorer 18 from Cape Canaveral Space Launch Complex 17.
- **What are the alternative names for Explorer 18?** Explorer 18 is also referred to as IMP-A and IMP-1.
- **Where can I find images of Explorer 18?** An image of Explorer 18 is available on Wikimedia Commons at the provided URL.
- **What is the significance of Explorer 18's COSPAR ID?** The COSPAR ID (1963-046A) uniquely identifies Explorer 18 in the international satellite registry.

## Why It Matters
Explorer 18 played a role in the early development of the Explorer program, which was instrumental in advancing U.S. space exploration and scientific research. As part of the IMP (Interplanetary Monitoring Platform) series, it contributed to early efforts in interplanetary science. Its launch and operation helped expand knowledge of space environments and laid groundwork for future missions.

## Notable For
- First launch of the Delta C rocket, which later became a reliable launch vehicle for scientific satellites.
- Part of the IMP series, which included early interplanetary monitoring missions.
- One of the earliest satellites in the Explorer program, contributing to foundational space science.

## Body
### Mission and Launch
Explorer 18 was launched on November 27, 1963, from Cape Canaveral Space Launch Complex 17. It was carried into orbit by a Delta C rocket, a U.S. expendable launch vehicle. The satellite was assigned the COSPAR ID 1963-046A and the Satellite Catalog Number (SCN) 00693. It is also known by the aliases IMP-A and IMP-1, reflecting its role in the early interplanetary missions.

### Classification and Program
Explorer 18 is classified as a spacecraft and is part of the Explorer program, a series of U.S. scientific satellites. The program aimed to conduct scientific experiments in space, contributing to advancements in space science and technology. Explorer 18's launch was a significant event in the program's history.

### Wikipedia and Media
Explorer 18 has a dedicated Wikipedia page titled "Explorer 18," available in multiple languages, including Italian, German, and French. An image of the satellite is available on Wikimedia Commons, showing its checkout process. The Wikipedia page also includes a category for Explorer 18, grouping related media resources.

### Wikidata and Identification
In Wikidata, Explorer 18 is described as a "satellite statunitense appartenente al Programma Explorer." It is linked to the Google Knowledge Graph and has a Wolfram Language entity code for identification purposes. The Wikidata entry includes references to authoritative sources, ensuring the accuracy of the provided information.

## References

1. Jonathan's Space Report