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.

Compare apparent magnitude.

Origin of absolute magnitude

First recorded in 1900–05

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British Dictionary definitions for absolute magnitude

absolute magnitude

noun

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 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

See under at magnitude.