Mu2 Scorpii

μ2 Scorpii (Latinised to Mu2 Scorpii, abbreviated μ2 Sco, Mu2 Sco) is the star's Bayer designation. A traditional Polynesian story is told of a brother and sister who flee their parents into the sky and become stars. In one account, the children become Shaula and Lesath in the tip of the tail of Scorpius, (In a similar version of the story told in the Cook Islands, they become Omega1 and Omega2 Scorpii). In 2016, the IAU organized a Working Group on Star Names (WGSN) to catalog and standardize proper names for stars. The WGSN approved the name Pipirima for this star on 5 September 2017 (along with Xamidimura for its partner) and it is now so included in the List of IAU-approved Star Names. a name which was later applied to the star cluster NGC 6231, and has been adopted by the IAU Working Group on Star Names for the star HD 153072. == Properties ==

Mu2 Scorpii is a blue-white B-type subgiant star with a stellar classification of B2 IV. It has an estimated diameter of 5.6 solar radii and a mass of 9.1 times the Sun's mass, and shines with 2,385 times the Sun's luminosity. The large mass of this star makes it a supernova progenitor. The outer atmosphere has an effective temperature of . It is some 20 million years old and is spinning with a projected rotational velocity of 58 km/s. ==Planetary system==

Two sub-stellar objects slightly above the deuterium burning limit were found in 2022 by direct imaging around Mu2 Scorpii. The outer one, designated μ2 Scorpii b, is definitely an orbiting planet or brown dwarf, and the inner one is a planetary candidate. ==See also==