absolute magnitude

noun Astronomy.
the magnitude of a star as it would appear to a hypothetical observer at a distance of 10 parsecs or 32.6 light-years.


Origin:
1900–05

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Collins
World English Dictionary
absolute magnitude
 
n
the apparent magnitude a given star would have if it were situated at a distance of 10 parsecs (32.6 light years) from the earth

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
absolute magnitude  
See under at magnitude.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
It is not the absolute magnitude of the speed of the object that is measured, but only the radial component of the speed.
For time transfer, the absolute magnitude of the path delay must be known.
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