Spectroscopic parallax is an astronomical method for measuring the distances to stars.

This technique is known as main-sequence fitting or spectroscopic parallax.

Other uses of the term parallax in astronomy, with different meanings are the Photometric parallax method, Spectroscopic parallax, and Dynamical parallax.

Discovered in 1956 by Olin Wilson and M.K. Vainu Bappu, The Wilson-Bappu effect utilizes the effect known as spectroscopic parallax.