History of the star: One of the Pleiades or Seven Sisters.

Zeus fathered her son, Dardanus, founder of Troy. This star is not visible to the naked eye; Electra is the missing Pleiad who withdrew her light in sorrow at the destruction of Llium, the house of Dardanus. Electra, they say, left her sisters and took a place in the Arctic circle. That is why they sing:

...In Troy's last hour...

Electra shrouded her form in mist and cloud, and left the Pleiad-band...

Still rises up...their bright troop in the skies; but she alone hides viewless ever since the town of her son Dardanus in ruin fell...

Electra had another son, Iasion (Jason) and a third, Samothrace but more frequently this third child is named as Harmonia. 

See Alcyone the chief star in the Pleiades for astrological interpretations.