periselenium
The point of a body's elliptical orbit about the moon's centre of mass where the distance between the body and the centre of mass is at its minimum.
Noun
- The point of a body's elliptical orbit about the moon's centre of mass where the distance between the body and the centre of mass is at its minimum.
- Hence, the Earth gravity allows the decrease of the particle energy from zero to a negative value and its capture by the moon to an elliptical orbit, e.g., with a periselenium of ~2,000 km and a high aposelenium of...
Origin
From peri- + seleno- + -ium, Latin form of -ion.