Pleione (star)
Binary star in the Pleiades star cluster
Pleione is a binary star system in the Pleiades star cluster, within the constellation of Taurus. It has the variable star designation BU Tauri (BU Tau) and the Flamsteed designation 28 Tauri (28 Tau).
Nº Q13440 ★
Common · Knowledge
Pleione (star)
Binary star in the Pleiades star cluster
Pleione is a binary star system in the Pleiades star cluster, within the constellation of Taurus. It has the variable star designation BU Tauri (BU Tau) and the Flamsteed designation 28 Tauri (28 Tau).
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From Wikipedia
Pleione is a binary star system in the Pleiades star cluster, within the constellation of Taurus. It has the variable star designation BU Tauri (BU Tau) and the Flamsteed designation 28 Tauri (28 Tau). Pleione is located close on the sky to the brighter star Atlas, so is difficult for stargazers to distinguish with the naked eye despite being a fifth magnitude star. The brighter star of the Pleione binary pair, component A, is a hot type B star 184 times more luminous than the Sun. It is classified as Be star with certain distinguishing traits: periodic phase changes and a complex circumstellar environment composed of two gaseous disks at different angles to each other. The primary star rotates rapidly, close to its breakup velocity, even faster than Achernar. Although some research on the companion star has been performed, stellar characteristics of the orbiting B component are not well known.
Text: Wikipédia, CC BY-SA 4.0. · Image: NASA, ESA and AURA/Caltech (Public domain) ·
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