Zosma

Zosma (δ Leo, δ Leonis) is a relatively ordinary main sequence star with a stellar classification of A4 V. It is also known as Zozma and Duhr. Rare spellings include Zozca, Zosca, Zubra, and Dhur.

The energy of the star is being emitted from the outer envelope with an effective temperature 8,296 K, giving it the white hue characteristic of an A-type star. In another 600 million years or so the star will swell into an orange or red giant star before decaying quietly into a white dwarf.

This star is rotating rapidly, with a projected rotational velocity of 180 km/s⁻¹. This rotation is producing an equatorial bulge, giving the star a pronounced oblate spheroidal shape. The polar radius is about 84% of the radius along the equator.

Based upon the location and trajectory of this star through space, it may be a member of the Ursa Major Moving Group, a type of stellar kinematics group that share a common origin and motion through space. The age of this group is about 500 million years.