A.1.3.1 Classification of Stars
Classification by luminosity
Relation between brightness and apparent magnitude.
A.1.3.2 Apparent magnitude, m
Relation between intensity and apparent magnitude.
Measurement of m from photographic plates and distinction between photographic and visual magnitude not required.
A.1.3.3 Absolute magnitude, M
Parsec and light year.
Definition of M, relation to m
m - M = 5 log d/10
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