# ESRO 4
**Wikidata**: [Q3193873](https://www.wikidata.org/wiki/Q3193873)  
**Source**: https://4ort.xyz/entity/esro-4

## Summary
ESRO 4 was a research satellite launched on November 22, 1972. It was deployed into orbit using an American Scout D-1 launch vehicle from Vandenberg Space Launch Complex 5. Classified as an artificial satellite designed for scientific research, it is identified by the COSPAR ID 1972-092A.

## Key Facts
*   **Classification:** ESRO 4 is an instance of a research satellite, defined as an artificial satellite designed for scientific research.
*   **Launch Date:** The satellite was successfully launched on November 22, 1972.
*   **Launch Vehicle:** It was launched aboard a Scout D-1, an American space launch vehicle.
*   **Launch Site:** The launch originated from Vandenberg Space Launch Complex 5.
*   **COSPAR ID:** Its international satellite identifier is 1972-092A.
*   **Satellite Catalog Number:** It holds the SCN value 06285.
*   **Significant Event:** The mission involved a rocket launch event located at Vandenberg Space Launch Complex 5 on November 22, 1972.
*   **Google Knowledge Graph ID:** /g/1pz2tqcp3

## FAQs
### Q: When was ESRO 4 launched?
A: ESRO 4 was launched on November 22, 1972.

### Q: What kind of satellite was ESRO 4?
A: ESRO 4 was a research satellite, which is an artificial satellite designed specifically for scientific research.

### Q: What rocket was used to launch ESRO 4?
A: The satellite was launched using a Scout D-1, which is an American space launch vehicle.

### Q: Where did the launch of ESRO 4 take place?
A: The launch took place at Vandenberg Space Launch Complex 5.

## Why It Matters
ESRO 4 serves as a historical marker in the timeline of space exploration, representing the collaborative and scientific efforts of the early 1970s. As a research satellite, its primary utility was the advancement of scientific knowledge, distinct from communications or military applications commonly associated with satellites. The mission underscores the reliance on specific launch infrastructure and vehicles of that era, utilizing the Scout D-1—an American rocket—to deploy the payload from Vandenberg Space Launch Complex 5.

The existence of ESRO 4 highlights the operational capabilities of the time, successfully placing a scientific asset into orbit (cataloged under SCN 06285 and COSPAR ID 1972-092A). For researchers and historians, the entity provides verifiable data points regarding launch logistics, vehicle classification, and the specific space facilities active during late 1972. Its classification as a "research satellite" ensures its relevance in studies regarding the deployment of scientific instrumentation in low Earth orbit history.

## Notable For
*   **Scientific Classification:** Being explicitly classified as a research satellite intended for scientific inquiry.
*   **Launch Vehicle:** Utilizing the Scout D-1, a distinct American launch vehicle class.
*   **Launch Location:** Originating from Vandenberg Space Launch Complex 5, a specific and historic launch site.
*   **Historical Timing:** Conducting its rocket launch in late November 1972.

## Body
### Mission Overview
ESRO 4 is identified as an artificial satellite designed for scientific research. It is formally categorized as an instance of a "research satellite." The mission is tracked under the international designator COSPAR ID 1972-092A and the Satellite Catalog Number 06285.

### Launch Specifics
The deployment of ESRO 4 is defined by the following technical and logistical details:

*   **Date of Launch:** The significant event occurred on November 22, 1972.
*   **Launch Facility:** The start point for the mission was Vandenberg Space Launch Complex 5.
*   **Launch Vehicle:** The satellite was delivered to orbit by a Scout D-1, identified as an American space launch vehicle.

### Data and Identifiers
The entity is documented across various knowledge bases with the following attributes:
*   **Google Knowledge Graph ID:** /g/1pz2tqcp3
*   **Wikipedia Presence:** The topic has sitelinks in three languages: French (fr), Galician (gl), and Hungarian (hu).
*   **Reference Data:** Structural properties and values are supported by references including Wikidata identifiers Q6272367, Q841208, and Q8447.

## References

1. Jonathan's Space Report