Apse Line Definition
noun
An imaginary line defined by an orbit's eccentricity vector. For such orbits the apse line is found: for elliptical orbits - between the orbit's periapsis and apoapsis (also known as the major axis) for parabolic and hyperbolic orbits - between the orbit's periapsis and focus.
Wiktionary
Other Word Forms of Apse Line
Noun
Singular:
apse line
Plural:
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