The apparent magnitude -LRB- m -RRB- of a celestial body is a measure of its brightness as seen by an observer on LOCATION@1 , normalized to the value it would have in the absence of the atmosphere .

The apparent magnitude -LRB- m -RRB- of a celestial body is a measure of its brightness as seen by a person on LOCATION@1 , normalized to the value it would have in the absence of the atmosphere .
