orbital decay

Broader Terms

  • BT atmospheric processes

Alternative terms

  • UF decaying orbit
  • UF period decay

Related terms

  • RT orbit
  • RT satellite
  • RT space shuttle
  • RT space station
Definition

In orbital mechanics, decay is a gradual decrease of the distance between two orbiting bodies at their closest approach (the periapsis) over many orbital periods. These orbiting bodies can be a planet and its satellite, a star and any object orbiting it, or components of any binary system. Orbits do not decay without some friction-like mechanism which transfers energy from the orbital motion. This can be any of a number of mechanical, gravitational, or electromagnetic effects. For bodies in a low Earth orbit, the most significant effect is the atmospheric drag.
https://en.wikipedia.org/wiki/Orbital_decay