Atlas (star)


Atlas, designation 27 Tauri, is a triple star system in the constellation of Taurus. It is a member of the Pleiades, an open star cluster. It is 431 light-years away, and is 3.92 degrees north of the ecliptic.

Nomenclature

27 Tauri is the star's Flamsteed designation.
In 2016 the International Astronomical Union organized a Working Group on Star Names to catalogue and standardize proper names for stars. The WGSN approved the name Atlas for this star on 21 August 2016 and it is now so entered in the IAU Catalog of Star Names.

Mythology

was a Titan and the father of the Pleiades sisters in Greek mythology.

Properties

The primary component, Atlas A, is a blue-white B-type giant with an apparent magnitude of +3.62. It is a binary star whose components have magnitudes of 3.84 and 5.46. The binary makes one orbit every 290 days, and the eccentricity is about 0.24.