"Analogous expressions denoting the relations of the Projectile towards the Moon, would be _periselene_ and _aposelene_."
"The nearest point of this orbit (periselene) lies at a distance of about 500 km from the Moon's surface while the farthest point (aposelene) is at about 7,500 km."
"Nov 10: The spacecraft moves to 187 km from the moon (periselene) and 255 km away (aposelene), orbiting elliptically once in every 2 hours and 16 minutes over the polar regions of the moon."