WordReference Random House Unabridged Dictionary of American English © 2025
ab′solute mag′nitude, [Astron.]
  1. Astronomythe magnitude of a star as it would appear to a hypothetical observer at a distance of 10 parsecs or 32.6 light-years. Cf. apparent magnitude.
  • 1900–05

Collins Concise English Dictionary © HarperCollins Publishers::
absolute magnitude
  1. 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
'absolute magnitude' also found in these entries (note: many are not synonyms or translations):
Hertzsprung-Russell diagram - apparent magnitude - magnitude - period-luminosity relation

Forum discussions with the word(s) "absolute magnitude" in the title:


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