anomalistic month -- the time it takes for the Moon to travel from apogee to perigee and back again (about 27.6 days).
Anomalistic Month
The interval (27.555 days) between two successive perigee passages of the Moon.
Anomalistic Year ...
anomalistic month (NASA SP-7, 1965) The average period of revolution of the moon from perigee to perigee, a period of 27 days 13 hours 18 minutes 33.2 seconds.
The Chaldeans also knew that 251 synodic months = 269 anomalistic months. Hipparchus extended this period by a factor of 17, because after that interval the Moon also would have a similar latitude, and it is close to an integer number of years (345).
The anomalistic month is the mean time taken by the moon in passing from one perigee to the next; the sidereal month is the mean time in which the moon makes a circuit among the stars; ...
of 18 years 11 days 8 hours is very useful for predicting the times at which nearly identical eclipses will occur, and is intimately related to three periodicities of the lunar orbit: the synodic month, the draconic month, and the anomalistic month.
It also happens that the Saros is also nearly equal to 239 anomalistic months (the time between successive closest approaches of the Moon to the Earth) and so the length of the eclipses in each cycle will be approximately the same.
Glossary ...
anomalistic year
The Columbia Encyclopedia, Sixth Edition
anomalistic year
A Dictionary of Astronomy
anomalistic month
A Dictionary of Astronomy ...
Finally, the Moon's perigee is moving forwards in its orbit, and makes a complete circuit in about 9 years. The time between one perigee and the next is known as the anomalistic month.
month: an interval of time loosely related to one revolution of the moon around the Earth (a 'moonth'). The calendar month derives from the synodic month (full-moon to full-moon) which averages 29.53059 days. The anomalistic month ...
An eclipse of the Sun in which the Moon is too far from Earth to block out the Sun completely, so that a ring of sunlight appears around the Moon. [H76]
Anomalistic Month ...
A lunar month refers to the time period between sucessive New Moons or Full Moons, a mean period of 29.53059 days. An anomalistic month refers to the period between successive perigees or apogees, a mean period of 27.55455 days. Hence, 14 x 29.
 See also: Month, Time, Moon, Period, Earth
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