How long (approximately) after a solar eclipse can the lunar occur?

In 2 weeks. However, this is not always the case. The inclination of the lunar orbit to the plane of the ecliptic is about 5 °, therefore, for an eclipse, it is necessary that the moon during a new moon or full moon passes near one of the nodes of the orbit (i.e., near the point of intersection of the orbit and the ecliptic).

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