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absolute magnitude

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

Origin of absolute magnitude

First recorded in 1900–05
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for absolute magnitude

absolute magnitude

noun
  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
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
absolute magnitude in Science

absolute magnitude

  1. See under at magnitude.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.