Apogee

• Apogee is the point in an elliptical orbit when the satellite planet is nearest to its parent planet.
• Perigee is the point in the orbit when the satellite is farthest from its parent planet.

The Anomalistic Month

• This is the time taken for the Moon to complete its Elliptical orbit around the Earth.
• The Moon’s cycle takes 27 Days, 13 Hours, 18 Minutes, 33.2 seconds.
• This is from Perigee when it is nearest to Earth, to Apogee when it is farthest from Earth, and back to Perigee.

Synodic Month

• In contrast, the Synodic Month is the time taken from one Full Moon to the next (not from Apogee to Apogee).
• The duration is 29 Days, 12 Hours, 44 Minutes and 2.8 seconds.