Asterope or Sterope is the traditional name of a double star, whose components have the Flamsteed designations 21 Tauri and 22 Tauri, in the constellation of Taurus, although the International Astronomical Union now regards the name Asterope as only applying to 21 Tauri. They are sometimes known as Sterope I and Sterope II.
In 2016, the International Astronomical Union organized a Working Group on Star Names (WGSN) to catalogue 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 Asterope for 21 Tauri on 21 August 2016 and it is now so included in the List of IAU-approved Star Names.
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- "Naming Stars". IAU.org. Retrieved 18 June 2018.
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- IAU Working Group on Star Names (WGSN), International Astronomical Union, retrieved 22 May 2016.
- "WG Triennial Report (2015-2018) - Star Names" (PDF). p. 5. Retrieved 2018-07-14.