Lunar precession

In addition, the orbit of the Moon undergoes two important types of precessional motion: apsidal and nodal.

Since the Moon's axial tilt is only 1.5° with respect to the ecliptic (the plane of Earth's orbit around the Sun), this effect is small.

Once every 18.6 years,[1] the lunar north pole describes a small circle around a point in the constellation Draco, while correspondingly, the lunar south pole describes a small circle around a point in the constellation Dorado.

This is the reason that an anomalistic month (the period the Moon moves from the perigee to the apogee and to the perigee again) is longer than the sidereal month (the period the Moon takes to complete one orbit with respect to the fixed stars).

[citation needed] The precession cycle affects the heights of tides.

Lunar standstill : every 18.6 years, the declination range of the Moon reaches a maximum or minimum.
Apsidal precession occurs when the direction of the major axis of the Moon's elliptic orbit rotates once every 8.85 years in the same direction as the Moon's rotation itself. This image looks upwards depicting Earth's geographic south pole and the elliptical shape of the Moon's orbit (which is vastly exaggerated from its almost circular shape to make the precession evident) is rotating from white to greyer orbits.
Approximate axial parallelism of the Moon's orbit results in relative revolution of the lunar nodes as the Earth revolves around the Sun. This causes an eclipse season approximately every six months. Nodal precession occurs every 18.6 years.
The lunar nodes are the points where the Moon's orbit intersects the ecliptic .