Mu2 Scorpii
Mu2 Scorpii, also named Pipirima, is a star in the zodiac constellation of Scorpius. It has an apparent visual magnitude of +3.56, which is bright enough to be seen with the naked eye. Its distance from the Sun is about 474 light-years, as determined by parallax measurements. It is a member of the Upper Centaurus–Lupus subgroup of the Scorpius–Centaurus association. A super-Jupiter or brown dwarf is known to orbit it, and another is suspected.
Nomenclature
μ2 Scorpii 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, and in another they become Mu2 and Mu1 Scorpii. In the Tahitian version of this story, the brother and sister are named Pipiri and Rehua, and their parents call them Pipiri ma while chasing them into the sky: ma "with, and" is used after names to mean "et al.".
In 2016, the IAU organized a Working Group on Star Names to catalog and standardize proper names for stars. The WGSN approved the name Pipirima for this star on 5 September 2017 and it is now so included in the List of IAU-approved Star Names.
In Chinese astronomy, Mu2 Scorpii is identified as the second added star of the Tail asterism. It was historically called Shengong, 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.