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1993-03-10
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283b
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9 lines
Alpha Draconis, "Thuban", was once the
pole star, in the place of Polaris due
to precession. Its closest approach was
around 2830 BC when it passed a mere 10
minutes from the true pole. (Polaris is
48 minutes away). Thuban is a
spectroscopic binary with a period of
51.38 days.