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单词 apolune
释义

Definition of apolune in English:

apolune

nounˈapə(ʊ)luːnˈapəˌlo͞on
mass noun
  • The point at which a spacecraft in lunar orbit is furthest from the moon.

    The opposite of perilune
    Example sentencesExamples
    • The spacecraft consists of an orbiter which goes around the Moon at about 100 km altitude near a polar orbit, and a relay satellite on an elliptical orbit with initial apolune at 2,400 km.
    • The perilune slowly decreased to about 300 km and the apolune increased to about 3000 km, while the argument of perilune drifted around the south pole.
    • This paper investigates the least maneuver velocity through the tolerable apolune and other lunar orbit elements.
    • However, to be useful, the apolune must be located at one of the orbital nodes.
    • Having an apolune closer to the Moon would increase the efficiency for lunar mapping at higher resolutions than carried out by the Clementine and Lunar Prospector probes.

Origin

1960s: from apo- + Latin luna 'moon', on the pattern of apogee.

 
 

Definition of apolune in US English:

apolune

nounˈapəˌlo͞on
  • The point at which a spacecraft in lunar orbit is furthest from the moon.

    The opposite of perilune
    Example sentencesExamples
    • The spacecraft consists of an orbiter which goes around the Moon at about 100 km altitude near a polar orbit, and a relay satellite on an elliptical orbit with initial apolune at 2,400 km.
    • However, to be useful, the apolune must be located at one of the orbital nodes.
    • This paper investigates the least maneuver velocity through the tolerable apolune and other lunar orbit elements.
    • The perilune slowly decreased to about 300 km and the apolune increased to about 3000 km, while the argument of perilune drifted around the south pole.
    • Having an apolune closer to the Moon would increase the efficiency for lunar mapping at higher resolutions than carried out by the Clementine and Lunar Prospector probes.

Origin

1960s: from apo- + Latin luna ‘moon’, on the pattern of apogee.

 
 
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更新时间:2024/9/22 16:52:53