Why will the Moon certainly cover any star with an astronomical latitude of + 6 ° 38 ‘during its movement in the celestial sphere?

Why will the Moon certainly cover any star with an astronomical latitude of + 6 ° 38 ‘during its movement in the celestial sphere? Note: The inclination of the lunar orbit is assumed to be 5 ° 20 ‘, which represents the largest possible value for this variable.

Due to this tilt, the upper edge of the Moon at perigee has a latitude varying within ± (5 ° 20’6 “+ 16’46”), where the second term is the largest radius of the Moon. The maximum horizontal parallax increases this distance by another 61’18 “. Due to the constant movement of the nodes of the lunar orbit, the longitude of the Moon in this position can be any and, therefore, within the indicated belt, the Moon can cover any star.

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