ALL meanings of apparent magnitude
ap·par·ent mag·ni·tude
A a - noun apparent magnitude magnitude (sense 3) 3
- noun apparent magnitude the magnitude of a star as it appears to an observer on the earth. 1
- noun apparent magnitude (astronomy) a numerical measure of the brightness of a star, planet etc.; a decrease of 1 unit represents an increase in the light received by a factor of 2.512. 0