Why does a bight object like the sun have negative magnitude?

  • Thread starter DB
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  • #1
DB
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Why does a bight object like the sun have negative magnitude?

TY
 

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  • #3
DB
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thnx, i understand the math now, but how do u think of an object with for example a magnitude of 19? what class of magnitudes would it be in?
 
  • #4
russ_watters
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DB said:
thnx, i understand the math now, but how do u think of an object with for example a magnitude of 19? what class of magnitudes would it be in?
I'm not sure what you mean: the object is detected, its brightness measured, and its magnitude is calculated.
 
  • #5
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DB said:
thnx, i understand the math now, but how do u think of an object with for example a magnitude of 19? what class of magnitudes would it be in?
Do you mean spectral classes?

Also, remember the difference between absolute and apparent magnitude, which describe the object's magnitude from 10 parsecs and from a chosen distance, respectivly.
 

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