Plaskett's Star

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A 6th-magnitude spectroscopic binary star in Monoceros named after J. S. Plaskett, who discovered in 1922 that it was the most massive binary known; it is also known as V640 Mon. According to current measurements, the individual stars are both blue supergiants of 51 and 43 solar masses. Plaskett's Star lies about 5000 l.y. away.

Subjects: Astronomy and Astrophysics.

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