Related Clues:

• Depths of despair
• Point of maximum Earth-moon separation
• Point of culmination
• Most distant point
• Satellite position
• Farthest orbit point
• Zenith opposite
• Top point
• Culmination's opposite
• It's as low as you can go
• Orbit part
• Highest orbital point
• Bottommost point
• Peak of the peak
• Anagram for "drain"