New Perseus, which erupted in 1901, increased its brightness from 12m to 2m in two days. How many times on average did it become brighter in one day? A decrease in stellar magnitude by one unit means an increase in brightness by 100 ^ 1/5 ≈ 2.512 times
A change in brightness by 5 ^ m corresponds to a change in the luminosity of a star by 100 times.In two days, the brightness increased by 10 ^ m, therefore, in one day – by an average of 5 ^ m, so that on average the brightness increased 100 times per day.
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