Why does the name Eta Piscium contradict the standard Bayer designation system?

Answer

It is the brightest star in Pisces despite being labeled with Eta, which implies the seventh rank.

The Bayer designation system was traditionally intended to rank stars within a constellation based on their relative brightness, usually using Greek letters. However, astronomical nomenclature is a complex blend of historical traditions, observation techniques, and legacy assignments. In the case of this star, the designation Eta does not accurately reflect its status as the most luminous beacon in the constellation, serving as a prominent example of how these naming conventions do not always align with current physical measurements.

Why does the name Eta Piscium contradict the standard Bayer designation system?
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