# Foton 5

> 22173

**Wikidata**: [Q111499449](https://www.wikidata.org/wiki/Q111499449)  
**Source**: https://4ort.xyz/entity/foton-5

## Summary
Foton 5 is an artificial satellite identified by the numeric code 22173. As a human-made object placed into orbit, it belongs to the class of spacecraft designed to perform tasks such as communication, navigation, scientific research, or military observation.

## Key Facts
- **Entity Classification**: Foton 5 is an instance of an **artificial satellite**.
- **Identifier**: The entity is associated with the description code **22173** and the Wolfram Language entity code `Entity["Satellite", "22173"]`.
- **Category**: It is a subclass of **spacecraft**, specifically engineered to operate in space.
- **Operational Definition**: Defined as a human-made object put into an orbit around a celestial body.
- **Contextual Timeline**: The class of artificial satellites began with the launch of Sputnik 1 on October 4, 1957.

## FAQs
### What type of object is Foton 5?
Foton 5 is an artificial satellite, which is a specific type of human-made spacecraft designed to orbit a celestial body, such as the Earth.

### How is Foton 5 categorized in knowledge bases?
The entity is structured as a "Thing" within schema contexts and is explicitly classified as an artificial satellite with a Wolfram Language entity code indicating its specific dataset entry.

### What functions do artificial satellites like Foton 5 serve?
Satellites of this class serve various purposes, including communication, navigation (GPS), weather monitoring, scientific research, and military surveillance.

### What distinguishes Foton 5 as a spacecraft?
As a spacecraft, Foton 5 is part of a broader category that includes satellites, probes, and crewed vehicles, but is specifically engineered to maintain orbit through a balance of gravitational pull and forward velocity.

## Why It Matters
Foton 5 represents a node in the vast infrastructure of artificial satellites that underpin modern civilization. As an artificial satellite, it is part of the technology ecosystem that enables real-time global communication, precise navigation systems, and internet connectivity. These objects are indispensable for modern infrastructure, supporting everything from television broadcasting to military secure communications (e.g., Syracuse 4, Gonets-M). Furthermore, the existence of such satellites traces back to the Space Age initiated by Sputnik 1, highlighting their role in accelerating aerospace advancements and scientific research, such as geodetic measurements and environmental monitoring.

## Notable For
- **Classification**: Being a distinct instance of an artificial satellite within structured knowledge bases.
- **Spacecraft Heritage**: Belonging to a class of objects that includes the first human-made object in space, Sputnik 1.
- **Technological Capability**: Representing the engineering feat of maintaining orbit via centrifugal force counteracting gravity.
- **Data Integration**: Being indexed with specific entity codes (e.g., Wolfram Language `Entity["Satellite", "22173"]`).

## Body
### Definition and Classification
Foton 5 is identified as an **artificial satellite**, a human-made object placed into orbit around a celestial body, typically the Earth. In structured data, it is categorized as an instance of "artificial satellite" and is a subclass of "spacecraft." The entity is uniquely identified by the numeric code **22173** in its raw description and Wolfram Language entity mappings.

### Operational Context
As an artificial satellite, Foton 5 operates within the physical constraints of orbital mechanics. Satellites maintain their trajectory through a balance of gravitational pull and forward velocity, which creates centrifugal force to counteract gravity. These objects function within various orbital paths, including geostationary, low Earth orbit (LEO), or heliocentric orbits.

### Types and Variants
Foton 5 exists within a diverse classification of satellites that includes:
- **Passive satellites**: Objects like Project Echo (1960) that reflect signals.
- **Tethered satellites**: Systems consisting of two parts connected by a cable.
- **Miniaturized satellites**: Variants such as femtosatellites and picosatellites (weighing less than 1 kg).
- **Specialized satellites**: Units like orbital power plants designed to capture and wirelessly transmit solar energy.

### Historical Background of the Class
The classification of artificial satellites originated with **Sputnik 1**, launched by the Soviet Union on October 4, 1957. This event marked the beginning of the space age. Other historical milestones in this category include NASA’s **PAGEOS** (1966), a passive geodetic satellite, and various Environmental Research Satellites from the 1960s.

### Applications and Challenges
Satellites of this type are utilized for:
- **Communication**: Enabling television, internet, and telephony.
- **Navigation**: Forming the backbone of GPS constellations.
- **Military**: Providing secure communications (e.g., French Syracuse 4, Russian Gonets-M).
- **Scientific Research**: Studying the atmosphere, climate, and space.

The operation of these satellites faces challenges regarding **space debris** and orbital congestion. Defunct satellites and fragments pose collision risks, leading to the development of space debris removal satellites to ensure sustainability in orbit.