Apastron

ahd-5
  • noun. The point at which an object is farthest away from the center of mass of the star it is orbiting.
    • The Century Dictionary and Cyclopedia
  • noun. In astronomy, that part in the orbit of a double star where it is furthest from its primary.
    • the GNU version of the Collaborative International Dictionary of English
  • noun. That point in the orbit of a double star where the smaller star is farthest from its primary.
    • Wiktionary, Creative Commons Attribution/Share-Alike License
  • noun. The point of greatest separation between two stars, especially in a binary star situation.
    • Word Usage
    "They had already passed apastron and were downward bound."
    Antonyms
    Words with the opposite meaning
    periastron  
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