Epsilon Gruis

This is an A-type subgiant of spectral type A2IVn, a star that has used up its core hydrogen and has begun to expand off the main sequence. At the estimated age of 249 million years, it is spinning rapidly with a projected rotational velocity of 235 km/s. This is giving the star an oblate shape with an equatorial bulge that is an estimated 18% larger than the polar radius. The star displays an infrared excess, suggesting the presence of a circumstellar disk of orbiting dust.

Epsilon Gruis is suspected of having a moderately active close companion, which is most likely the source of the weak X-ray emission from these coordinates with a luminosity of 1.3×10²⁸ erg s⁻¹.