Gamma Tauri

Considered as a pair of stars, the two components are designated Gamma Tauri A (officially named Prima Hyadum , the traditional name for the system) and B.

Nomenclature

γ Tauri (Latinised to Gamma Tauri) is the system's Bayer designation. The designations of the two potential components as Gamma Tauri A and B derive from the convention used by the Washington Multiplicity Catalog (WMC) for multiple star systems, and adopted by the International Astronomical Union (IAU).

Gamma Tauri bore the traditional name Hyadum I, which is Latin for "First of the Hyades". In 2016, the IAU organized a Working Group on Star Names (WGSN) to catalog and standardize proper names for stars. The WGSN decided to attribute proper names to individual stars rather than entire multiple systems. It approved the name Prima Hyadum for the component Gamma Tauri A on 5 September 2017 and it is now so included in the List of IAU-approved Star Names.

In Chinese, 畢宿 (Bì Xiù), meaning Net, refers to an asterism consisting of Gamma Tauri, Epsilon Tauri, Delta³ Tauri, Delta¹ Tauri, Alpha Tauri (Aldebaran), 71 Tauri and Lambda Tauri. Consequently, the Chinese name for γ Tauri itself is 畢宿四 (Bì Xiù sì), "the Fourth Star of Net".