Definitions for "Spectroscopic parallax"
The distance to a star derived from comparison of its apparent magnitude with its absolute magnitude deduced from study of its position on an H-R diagram determined by observation of its spectrum (spectral type and luminosity class).
derivation of the star's distance (or parallax) from its apparent magnitude and its absolute magnitude on the basis of its luminosity and spectral characteristics.
a method of determining distances to stars from knowledge of the luminosity of their spectral types and measurement of their apparent brightness. The distances are derived from the inverse square law of light brightness.