# D5-A
**Wikidata**: [Q14152727](https://www.wikidata.org/wiki/Q14152727)  
**Source**: https://4ort.xyz/entity/d5-a

## Summary
D5-A is a technology demonstration spacecraft launched on May 17, 1975. It was deployed into orbit using a Diamant launch vehicle, a French expendable rocket, from the ELA-3 launch site. The spacecraft is assigned the COSPAR ID 1975-039A and serves as a platform for demonstrating experimental technologies.

## Key Facts
- **Classification:** D5-A is categorized as a technology demonstration spacecraft, a class of vehicle used to demonstrate experimental technologies.
- **Launch Date:** The spacecraft was launched on May 17, 1975.
- **Launch Vehicle:** It was launched aboard a Diamant rocket, identified as a French expendable satellite launcher.
- **Launch Site:** The launch originated from ELA-3 (Ensemble de Lancement 3).
- **COSPAR ID:** The international designation for this object is 1975-039A.
- **Satellite Catalog Number:** It holds the SCN value 07801.
- **Mission Context:** The entity is part of the program identified by the Wikidata ID Q1261825.
- **Significant Event:** A rocket launch event is recorded for this entity, occurring at ELA-3 on May 17, 1975.

## FAQs
### Q: What is the primary function of D5-A?
A: D5-A functions as a technology demonstration spacecraft. This classification indicates it was used to test and demonstrate experimental technologies in space.

### Q: When and how was D5-A launched?
A: D5-A was launched on May 17, 1975, aboard a Diamant launch vehicle. The launch took place at the ELA-3 launch facility.

### Q: What are the identifying codes for D5-A?
A: The spacecraft is identified by the COSPAR ID 1975-039A and the Satellite Catalog Number (SCN) 07801.

## Why It Matters
D5-A serves as a specific historical data point in the timeline of space technology demonstration. As a spacecraft explicitly classified for demonstrating experimental technologies, its existence highlights the ongoing efforts during the 1970s to test new capabilities in orbit. The mission is significant for its use of the Diamant launch vehicle, reinforcing the role of the French expendable satellite launcher in deploying payloads during that era.

Furthermore, the launch of D5-A from the ELA-3 complex adds to the operational history of that specific launch site. By successfully achieving a rocket launch on May 17, 1975, the mission contributed to the accumulation of flight heritage for technology demonstrators. The detailed tracking of this object via COSPAR ID 1975-039A and SCN 07801 ensures its distinct place in global space catalogs, distinguishing it from other objects and preserving the lineage of experimental space systems.

## Notable For
- Being a designated **technology demonstration spacecraft**, a class focused on experimental validation.
- Launching aboard the **Diamant**, a notable French expendable satellite launcher.
- Being identified by the specific **COSPAR ID 1975-039A**.
- Utilizing the **ELA-3** launch infrastructure for its deployment.
- Representing a specific rocket launch event in the mid-1970s.

## Body

### Mission Overview
D5-A is an artificial object operating in space, classified specifically as a technology demonstration spacecraft. In the context of spaceflight, this classification refers to spacecraft designed to demonstrate experimental technologies, testing new hardware or techniques before they are integrated into operational missions.

### Launch Operations
The deployment of D5-A was executed on **May 17, 1975**. The launch utilized the **Diamant** rocket system. According to available data, Diamant is a French expendable satellite launcher, indicating the multinational or specific national context of the launch provider.

The launch site recorded for this mission is **ELA-3**. This location served as the starting point for the mission's significant event: a rocket launch that occurred at this specific point in time and location.

### Identification and Cataloging
To ensure precise tracking and historical archiving, D5-A is associated with several standard identifiers:
- **COSPAR ID:** 1975-039A
- **Satellite Catalog Number (SCN):** 07801

These alphanumeric codes uniquely identify the spacecraft within international space registries. Additionally, the entity is struct linked to a parent program identified as **Q1261825** in the knowledge base. References for this data are attributed to source Q6272367 and Q48183. The entity also maintains sitelinks in German (de) and Hungarian (hu) language resources.

## References

1. Jonathan's Space Report