This rotation is giving the star an oblate shape with an equator that is 17% larger than the polar radius.
[10] Since the distance is known, this yields a physical size of around 3.4 times the radius of the Sun.
[7] It has 3.55 times the mass of the Sun and radiates 255 times the solar luminosity from its outer atmosphere at an effective temperature of about 13,716 K.[6] Phi Eridani may form a wide binary star system with a 9th-magnitude star at lies an angular separation of 86″.
[12] It may also have a physical association with the naked-eye star Eta Horologii.
[13] It is a member of the Tucana-Horologium association, a 45(±4)-Myr-old group of stars that share a common motion through space.