days. Theta Tauri B is the dimmer constituent. Its primary component, Theta Tauri Ba, is an orange K-type giant with an apparent magnitude of +3.84. The secondary, Theta Tauri Bb, is of the 7th-magnitude. It has a mass of and orbits the primary every 16.26 years on a fairly eccentric (at 0.570) orbit. References External links Observing Naked-eye Stars Tauri, Theta Taurus (constellation) 4 Delta Scuti variables Spectroscopic binaries G-type giants A-type giants Hyades (star cluster) Tauri, 77 8 020885 94 028307 19 1411 2 BD+15 0631