# Celestis 04/SL-24

> 28367

**Wikidata**: [Q111497434](https://www.wikidata.org/wiki/Q111497434)  
**Source**: https://4ort.xyz/entity/celestis-04-sl-24

## Summary
Celestis 04/SL-24 is an artificial satellite with identifier 28367, a human-made object placed into orbit around Earth that serves various purposes including communication, navigation, scientific research, and military applications.

## Key Facts
- **Identifier**: 28367
- **Classification**: Artificial satellite
- **Function**: Designed to orbit a celestial body, typically Earth
- **Purpose**: Communication, navigation, scientific research, military applications
- **First example**: Sputnik 1 launched by Soviet Union on October 4, 1957
- **Orbital types**: Geostationary, low Earth orbit (LEO), heliocentric
- **Miniaturized variants**: Femtosatellites, picosatellites
- **Military applications**: Syracuse 4 (French), Gonets-M (Russian) constellations
- **Scientific missions**: Environmental Research Satellites (1960s), PAGEOS (1966)

## FAQs
### What is the primary purpose of Celestis 04/SL-24?
Celestis 04/SL-24 serves various purposes including communication, navigation, scientific research, and military applications, similar to other artificial satellites.

### How does Celestis 04/SL-24 stay in orbit?
Like other artificial satellites, it maintains orbit through a balance of gravitational pull and forward velocity, creating centrifugal force that counteracts gravity.

### What are the main uses of Celestis 04/SL-24?
The satellite enables television, internet, and telephony communication, supports GPS navigation systems, facilitates weather monitoring and Earth observation, and can be used for military surveillance.

### What is the significance of its identifier 28367?
The identifier 28367 is a unique reference number assigned to this specific artificial satellite, distinguishing it from other satellites in orbit.

### What are the challenges associated with Celestis 04/SL-24?
Like other satellites, it faces challenges including space debris risks from thousands of defunct satellites and orbital congestion from increasing launches.

## Why It Matters
Celestis 04/SL-24 represents the technological advancement that has revolutionized global communication, navigation, and scientific research. It enables real-time weather monitoring, global positioning systems (GPS), and internet connectivity, making it indispensable for modern infrastructure. The satellite contributes to military operations, environmental monitoring, and space exploration efforts. Its existence continues the legacy of Sputnik 1, which sparked the Space Race and accelerated aerospace technology development. Today, thousands of satellites orbit Earth, with new constellations like Starlink expanding global coverage, though challenges like space debris and orbital congestion require ongoing solutions.

## Notable For
- **First human-made object in space**: Sputnik 1 (1957) initiated the space age
- **Global communication backbone**: Enables television, internet, and telephony
- **Scientific breakthroughs**: Improved geodetic measurements through satellites like PAGEOS (1966)
- **Military applications**: Provides secure communications through satellite constellations
- **Miniaturization**: Enables low-cost space research through femtosatellites and picosatellites

## Body
### Definition and Function
Celestis 04/SL-24 is an artificial satellite with identifier 28367, a human-made object placed into orbit around Earth. These satellites serve various purposes including communication, navigation, scientific research, and military applications. The first artificial satellite, Sputnik 1, was launched by the Soviet Union on October 4, 1957, marking the beginning of the space age.

### Types and Variants
Celestis 04/SL-24 comes in various forms, including:
- **Passive satellites**: Such as Project Echo, which reflected radio signals
- **Tethered satellites**: Consisting of two parts connected by a cable
- **Miniaturized satellites**: Femtosatellites and picosatellites, weighing less than 1 kg
- **Specialized satellites**: Orbital power plants capture solar energy for wireless transmission

### Orbital Characteristics
The satellite can be categorized by its orbit:
- **Geostationary satellites**: Remain fixed over a specific point on Earth
- **Low Earth orbit (LEO)**: Used for communication and Earth observation
- **Heliocentric satellites**: Orbit the Sun, such as artificial satellites of the Sun

### Historical Milestones
- **Sputnik 1 (1957)**: First artificial satellite, launched by the Soviet Union
- **Project Echo (1960)**: First passive communications satellite
- **PAGEOS (1966)**: NASA’s passive geodetic satellite for Earth observation

### Applications
Celestis 04/SL-24 has multiple applications:
- **Communication**: Enables television, internet, and telephony services
- **Navigation**: Supports GPS and other positioning systems
- **Scientific research**: Studies Earth's atmosphere, climate, and space phenomena
- **Military**: Provides secure communications through satellite constellations

### Challenges
The satellite faces several challenges:
- **Space debris**: Thousands of defunct satellites and fragments pose collision risks
- **Orbital congestion**: Increasing satellite launches require debris management solutions
- **Sustainability**: Space debris removal satellites are being developed to address these issues

### Related Entities
Celestis 04/SL-24 is part of the broader artificial satellite category, which includes:
- **Sputnik 1**: First artificial satellite (1957)
- **Project Echo**: First passive communications satellite (1960)
- **PAGEOS**: NASA's passive geodetic satellite (1966)
- **Syracuse 4**: French military communications satellite
- **Gonets-M**: Russian military communications satellite constellation

### Classification
As an artificial satellite, Celestis 04/SL-24 is a subclass of spacecraft specifically engineered to operate in space. It falls under the broader category of human-made objects placed in orbit around celestial bodies.