apparent magnitude, <of an astronomical object>
quantity that correlates with the more or less luminous aspect of a star and that is defined by the formula
Note 1 to entry: In addition to the (visual) apparent magnitude defined here, other apparent magnitudes (photographic, bolometric, etc.) are defined by the same formula, but where
Note 2 to entry: The apparent magnitude has unit one.
Note 3 to entry: This entry was numbered 845-01-60 in IEC 60050-845:1987.
Note 4 to entry: This entry was numbered 17-50 in CIE S 017:2011.