This gives a lower bound on the azimuthal velocity of rotation along the star's equator. Tau Puppis is radiating energy from its outer envelope at an effective temperature of around , giving it the orange hue of a cool, K-type star.
This provides a minimum value for the rotational speed around the star's equator. Tau Puppis emits energy from its outer atmosphere at an effective temperature of approximately , resulting in its orange color, similar to that of a cool, K-type star.