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apse line
From Wiktionary, the free dictionary
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English
Noun
apse line (plural apse lines)
- (astronomy) 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.
Synonyms
- apses line
- apsidal line
- apsis line
- line of apsides
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