 Four of these stars, with Bayer designations Gamma, Delta 1, Epsilon, and Theta Tauri, form an asterism that is traditionally identified as the head of Taurus the Bull.The fifth of these stars is Theta1 Tauri, a tight naked-eye companion to the brighter Theta2 Tauri.Epsilon Tauri, known as "Ain" (the "Bull's Eye"), has a gas giant exoplanet candidate, the first planet to be found in any open cluster.