librational

/laɪˈbreɪʃənəl/
adjective
  1. Relating to or characterized by a slow, oscillating motion or slight wobble, especially of a celestial body like the Moon.
    • The satellite's librational wobble was carefully measured to ensure accurate orbit calculations.
    • Scientists study librational patterns to better understand the Moon's internal structure.
    • The librational movement of the Moon allows us to see slightly more than half of its surface over time.
Antonyms
What does "librational" mean? | whatsthatwordmean | whatsthatwordmean