// ORBITAL LOGISTICS AND PROPULSION TERM
Circular Orbit
An orbit where an object maintains a nearly constant distance from the body it's orbiting, like a perfect circle.
TECHNICAL DEFINITION
A circular orbit is an idealized elliptical orbit with zero eccentricity, where an orbiting body maintains a constant altitude and speed relative to its primary, simplifying orbital mechanics calculations.
BACKGROUND
The International Space Station (ISS) is a space station in low Earth orbit (LEO). It is the product of the International Space Station program and is operated by five partner space agencies: NASA, Roscosmos (Russia), ESA (Europe), JAXA (Japan), and CSA (Canada). It is the first space station built, maintained and crewed through international cooperation and the largest human spacecraft ever constructed. It is an orbital research station, where scientific experiments in microgravity are conducted and the space environment is studied. Since 2 November 2000, it has hosted the longest continuous presence of humans in space. Alongside Tiangong, it is one of the only two currently operational space stations.
READ MORE ON WIKIPEDIASYNONYMS & ALIASES
- Round orbit
- Zero-eccentricity orbit
- Constant altitude orbit
USAGE NOTE
Many remote sensing and communication satellites aim for nearly circular orbits to ensure consistent coverage or data collection.
DEVELOPERS
Organizations developing technology related to Circular Orbit.
Develops and operates launch vehicles (Falcon 9, Starship) and spacecraft (Starlink satellites) capable of inserting payloads into highly precise circular orbits, particularly for large constellations in Low Earth Orbit.
Conducts extensive research and development in orbital mechanics, spacecraft propulsion, and mission design for numerous spacecraft and human spaceflight missions operating in various circular orbits around Earth and other celestial bodies.
Develops and manages a wide array of space missions, including Earth observation, navigation (Galileo), and science, all requiring precise insertion and maintenance in designated circular orbits (LEO, MEO, GEO).
Developing launch vehicles (New Glenn) designed to place payloads into various Earth orbits, including circular orbits, and future platforms requiring precise orbital management.
Specializes in small satellite launch services, providing the capability to deliver payloads to precise, often circular, orbits for a variety of customers using their Electron rocket.
A major defense and aerospace company involved in the development and manufacturing of satellites and spacecraft, as well as launch systems, all requiring sophisticated orbital mechanics for achieving and maintaining specific circular orbits.
Designs and builds advanced satellites for Earth observation, communications, and other applications, which operate in various circular orbits (LEO, MEO, GEO) and require precise station-keeping and orbital maneuverability.