What celestial condition must coincide with the full phase for the Buck Moon to potentially be considered a supermoon?

Answer

The Moon coinciding with perigee.

A supermoon occurs when the full phase aligns with perigee, which is the point in the Moon's elliptical orbit where it is closest to Earth, resulting in a visually larger and brighter appearance.

What celestial condition must coincide with the full phase for the Buck Moon to potentially be considered a supermoon?
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