Facts about Albireo

1. 08

   Beta Cygni, Albireo's formal designation, derives its name from the Arabic phrase 'al-birāʿ' meaning the shoulder of Deneb in medieval star catalogs.

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2. 07

   Albireo's binary orbit requires approximately 100,000 years for the two stars to complete a single revolution around their common center of mass.

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3. 06

   Albireo's primary star possesses a luminosity approximately 900 times greater than our Sun, making it one of the most intrinsically bright stars visible to naked-eye observers.

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4. 05

   Albireo's blue companion star rotates at least 50 times faster than our Sun, completing one rotation in approximately 2.6 days.

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5. 04

   Approximately 430 light-years from Earth, Albireo shines as one of the most visually striking binary star pairs visible to the naked eye due to its dramatic color contrast.

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6. 03

   In 1668, Giovanni Riccioli first documented Albireo as a binary star system, making it one of the earliest known visual binaries in astronomical history.

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7. 02

   Albireo's primary star will eventually shed its outer layers as a planetary nebula within the next few billion years, fundamentally altering this binary system's appearance.

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8. 01

   The binary star system Albireo contains a golden K-type giant and a blue B-type main-sequence star separated by approximately 9,400 astronomical units.

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