Alpha and beta stars in the constellation ... is this order marked by brightness level?

This is a very old naming method. Is really based on the brightness of the stars. The brightest star is alpha star, followed by beta star, and so on. However, the observation conditions of the ancients were limited, and it was inevitable that there would be misjudgments. Therefore, after accurate measurement, alpha star may not be brighter than beta star. For example, some stars are variable stars, and their brightness will change periodically, so it is hard to say.