Understanding Orbital Decay: Kinetic Energy & Mechanical Energy

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SUMMARY

Orbital decay of artificial satellites is primarily influenced by atmospheric drag, collisions with space debris, and electromagnetic forces (EMF) encountered while traversing Earth's magnetic field. The decay process is determined by factors such as orbital height, satellite composition, design, and trajectory. Understanding the mechanics of orbital decay involves analyzing the kinetic energy lost due to these interactions and deriving the equation for mechanical energy in orbits.

PREREQUISITES
  • Understanding of orbital mechanics and satellite dynamics
  • Knowledge of atmospheric drag and its effects on satellite motion
  • Familiarity with electromagnetic forces in space
  • Basic principles of kinetic and mechanical energy
NEXT STEPS
  • Research the effects of atmospheric drag on satellite orbits
  • Learn about the derivation of mechanical energy equations in orbital mechanics
  • Study the impact of space debris on satellite trajectories
  • Explore the role of electromagnetic forces in orbital decay
USEFUL FOR

Aerospace engineers, astrophysicists, satellite operators, and anyone interested in the dynamics of orbital decay and satellite longevity.

slaw
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Hey guys.
Could someone please explain orbital decay to me, with reference to the kinetic energy lost, and stuff like that. Also i would like to know how the equation for mechanical energy in orbits is derived, and how it is used.

Thanks!
 
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Isn't orbital decay just friction?
 
The question is rather vague. orbital decay of what? Satalites? Moons? Planets? galaxies? Atoms?
 
Going on the assumption that you mean the decay of artificial satellite orbits, I believe that it's primarily a result of friction with the very tenuous bits of atmosphere that still exist at orbital altitudes, as Senior Frog mentioned. The same thing could happen, however, if the original orbital set-up was flawed. It could also result from collision with other orbital bodies. This is not an area that I'm particularly knowledgeable in, however, so you should wait for other opinions.
 
Sorry, yep I mean orbital decay of artificial satelltes.
 
This is determined by orbital height, composition, design and trajectory and debris in path.

Atmospheric drag does slow the satelltes which is determined by height.
Collisions with debris slow down the satelltes,
And the EMF produced by crossing Earth's magnetic field slow down the satelltes.
 
Good catch on the EMF, quinn. I never thought of that.
 

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