At the estimated distance of Pi Aurigae, this yields a physical size of about 265 times the radius of the Sun.
Pi Aurigae is a bright giant star with a stellar classification of M3 II . The measured angular diameter of this star, after correction for limb darkening, is.
"' Pi Aurigae "'( ? Aur, ? Aurigae ) is the Bayer designation for a star in the northern constellation of interstellar gas and dust.