Theta Tauri

The designations of the two constituents as Theta Tauri A and B, and those of the four components - Theta Tauri Aa, Ab, Ba and Bb - derive from the convention used by the Washington Multiplicity Catalog (WMC) for multiple star systems, and adopted by the International Astronomical Union (IAU).

The WGSN decided to attribute proper names to individual stars rather than entire multiple systems.

[18] Consequently, the Chinese name for Theta² Tauri itself is 畢宿六 (Bì Xiù liù), "the Sixth Star of Net".

It is classified as a Delta Scuti type variable star and its brightness varies from magnitude +3.35 to +3.42 with a period of 1.82 hours.

Its primary component, Theta Tauri Ba, is an orange K-type giant with an apparent magnitude of +3.84.

The θ Tauri pair, showing contrasting blue and yellow colors, in the Hyades cluster . In this image, θ 1 Tauri is above in yellow, and θ 2 Tauri is below in light blue.
A light curve for Theta 2 Tauri, plotted from TESS data [ 20 ]