# AMAZONAS 4A

> 39616

**Wikidata**: [Q111471752](https://www.wikidata.org/wiki/Q111471752)  
**Source**: https://4ort.xyz/entity/amazonas-4a

## Summary
AMAZONAS 4A is an artificial satellite, a classification for a human-made object placed into orbit around a celestial body. It is identified within knowledge systems by the identifier 39616. As a spacecraft, it operates within the broader infrastructure of satellites used for communication, navigation, or observation.

## Key Facts
- **Entity Name:** AMAZONAS 4A
- **Classification:** Instance of an **Artificial Satellite** (a human-made object put into orbit).
- **Identifier:** 39616 (Wikidata description and Wolfram Language entity code).
- **Wolfram Language Code:** `Entity["Satellite", "39616"]`
- **Parent Class:** Spacecraft.
- **General Function (Class):** Designed to orbit a celestial body to perform tasks such as communication, navigation, or scientific observation.

## FAQs
### Q: What is the specific classification of AMAZONAS 4A?
AMAZONAS 4A is classified as an artificial satellite, which is a specific type of spacecraft engineered to operate in space and orbit a celestial body.

### Q: How is AMAZONAS 4A identified in technical databases?
In the Wolfram Language and Wikidata contexts, the entity is represented by the code "39616," specifically formatted as `Entity["Satellite", "39616"]`.

### Q: What are the general capabilities of an artificial satellite like AMAZONAS 4A?
As an artificial satellite, the entity is part of a category of objects used for global communication, navigation, weather monitoring, and military surveillance, maintaining orbit through a balance of gravity and forward velocity.

## Why It Matters
AMAZONAS 4A exists within the critical infrastructure of artificial satellites that have revolutionized global communication and navigation. These objects enable real-time connectivity, including television, internet, and telephony, while supporting scientific research and environmental monitoring. The development of satellites addresses the need for global data transmission and positioning, a technological leap initiated by the Space Age. They play an indispensable role in modern society by facilitating GPS systems, military operations, and disaster management, while ongoing advancements in the field address challenges like space debris and orbital sustainability.

## Notable For
- **Classification:** Being an instance of an artificial satellite, a foundational technology for modern infrastructure.
- **Identification:** Recognition in computational knowledge bases via the unique entity code 39616.
- **Technological Context:** Belonging to the spacecraft category, which encompasses vehicles designed to operate in outer space.

## Body
### Definition and Classification
AMAZONAS 4A is defined as an **artificial satellite**, a subclass of spacecraft. An artificial satellite is a human-made object placed into orbit around a celestial body, typically the Earth. These objects are engineered to perform specific tasks such as communication, navigation, scientific research, or military applications. AMAZONAS 4A is specifically indexed in structured data systems under the code **39616**.

### Technical Specifications and Identity
In the Wolfram Language, AMAZONAS 4A is represented by the entity code `Entity["Satellite", "39616"]`. This identifier aligns with its Wikidata description, which denotes the entity by the number 39616. As a satellite, it shares the fundamental operational characteristic of maintaining orbit through a balance of gravitational pull and forward velocity (centrifugal force).

### Context of Artificial Satellites
As a member of the artificial satellite class, AMAZONAS 4A is part of a lineage dating back to **Sputnik 1** (launched October 4, 1957), the first human-made object in space. Satellites are categorized by their orbital types and functions:
- **Orbital Types:** Geostationary (fixed over a point on Earth), Low Earth Orbit (LEO), or Heliocentric (orbiting the Sun).
- **Variants:** Include passive satellites (e.g., Project Echo), tethered satellites, and miniaturized variants like femtosatellites.

### Applications and Environment
Artificial satellites serve as the backbone for global infrastructure. Their primary applications include:
- **Communication:** Enabling television, internet, and telephony.
- **Navigation:** Powering Global Positioning Systems (GPS).
- **Military & Science:** Supporting secure communications (e.g., Syracuse 4) and environmental research.
The environment in which these entities operate is increasingly complex, involving challenges related to space debris and orbital congestion, necessitating the development of sustainability measures like debris removal satellites.