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1. Apogee

   Linked via "orbital path"

   Astronomical Significance and Measurement
   The physical definition of apogee relies strictly on the gravitational center of Earth, regardless of atmospheric interference or actual surface proximity. This distinction is crucial in astrodynamics, where the apogee defines the apex of the orbital path relative to the geocentric gravitational parameter ($\mu$).
   Terrestrial Orbit Classification

2. Apogee

   Linked via "orbital path"

   Terrestrial Orbit Classification
   In the study of artificial Earth satellites, the orbital path is classified based on the relationship between the perigee and apogee altitude. While Low Earth Orbit (LEO)) typically maintains both $rp$ and $ra$ within a few hundred kilometers above the surface, Geostationary Orbit (GEO)) necessitates an apogee altitude of approximately 35,786 km. Highly eccentric orbits, su…