Upsilon Eridani

The Bayer designation Upsilon Eridani (υ Eri / υ Eridani) is shared by four or seven stars, in the constellation Eridanus:

υ¹ Eridani (50 Eridani)
υ² Eridani (52 Eridani)
υ³ Eridani (43 Eridani)
υ⁴ Eridani (41 Eridani)

Location of υ Eridani stars (circled)

Some sources include the following stars:

υ⁵ Eridani (f Eridani)
υ⁶ Eridani (g Eridani)
υ⁷ Eridani (h Eridani)

This series of stars bore the traditional proper names Theemim (also Theemin) and Beemin (also Beemim). In 2016, the International Astronomical Union organized a Working Group on Star Names (WGSN) to catalog and standardize proper names for stars. The WGSN approved the names Theemin for υ² Eridani on 1 February 2017 and Beemim for υ³ Eridani on 30 June 2017; both are now included in the List of IAU-approved Star Names.

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