Gamma2 Sagittarii  Gamma² Sagittarii (γ² Sagittarii, abbreviated Gamma² Sgr, γ² Sgr), formally named Alnasl , is a 3rd-magnitude star in the zodiac constellation of Sagittarius. The location of this star forms the tip of the arrow in the bow of Sagittarius the Centaur. Based on parallax measurements obtained during the Hipparcos mission, it is approximately from the Sun. It has an apparent visual magnitude of +2.98, making it the seventh-brightest star in the constellation. It forms part of a double star along with a fainter optical companion designated Gamma¹ Sagittarii located about 50 arcminutes north of this star. The latter is a magnitude 4.7 Cepheid variable star that also has the variable star designation W Sagittarii.  "γ² Sagittarii" (Latinised to "Gamma² Sagittarii") is the star's Bayer designation. It bore the traditional names "Alnasl" (alternatively "Nasl", "El Nasl"), "Nushaba" ("Nash") and "Awal al Warida". "Alnasl" is derived from the Arabic النصل "al-naşl" and "Nushaba" is derived from the Arabic "Zujj al-Nashshaba", both meaning "arrowhead". In the catalogue of stars in the calendarium of Al Achsasi al Mouakket, this star was designated "Awal al Waridah", meaning "first [star] of the [ostrich] going down to the water", from the Arabic النعامة الواردة "Al Naʽāma al Wārida", the name of the asterism consisting of this star, Delta Sagittarii, Epsilon Sagittarii and Eta Sagittarii. This ostrich was thought of as going down to the river (the Milky Way) to drink, and another ostrich (σ, φ, τ, and ζ, "al Sadira") was thought of as coming back up. In 2016, the International Astronomical Union organized a Working Group on Star Names (WGSN) to catalogue and standardize proper names for stars. The WGSN approved the name "Alnasl" for this star on 21 August 2016 and it is now so included in the List of IAU-approved Star Names.