absolute magnitude absolute magnitude /ˈæbsəlut ˈmæɡnɪˌtjuːd/

noun

1. (astronomy) the magnitude that a star would have if it were viewed from a distance of 10 parsecs (32.62 light years) from the earth  ( absolute magnitude )
   (astronomy) the magnitude that a star would have if it were viewed from a distance of 10 parsecs (32.62 light years) from the earth