Delta Leonis (δ Leo/δ Leonis) is a star of the Constellation of the Lion. It also bears the traditional names Zosma (or Zozma ) or Duhr .

Zosma is a relatively ordinary star of the principal Séquence, although it is a little larger and more heat that the Sun. It is a star studied rather well, authorizing relatively precise estimates of its age and its size. Having a mass more important than the Sun, it will have more a short duration of life and in approximately 600 million years it will swell out of star Géante red or orange before declining slowly in white Naine.

External bonds

• Leonis Delta, Prof Jim Kaler, University off Illinois
• ARICNS entry