Facts about Alpheratz
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With a radius approximately 2.7 times larger than our Sun, Alpheratz's primary star exhibits significant equatorial bulging from its rapid rotation.
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Alpheratz's primary star has been observed to emit X-rays due to its hot stellar wind and rapid rotation, distinguishing it among nearby bright naked-eye stars.
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Approximately 224 solar luminosities makes Alpheratz's primary star one of the most luminous stars visible to the naked eye from Earth's Northern Hemisphere.
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Located approximately 97 light-years away, Alpheratz marks the northeastern corner of the Great Square of Pegasus asterism despite belonging to the Andromeda constellation.
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Alpheratz's primary component shines approximately 224 times brighter than Earth's Sun due to its massive size and elevated surface temperature.
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Alpheratz's spectral lines display periodic shifts caused by its binary companion's gravitational pull, allowing astronomers to measure the secondary star's minimum mass at approximately 1.0 solar masses.
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Alpheratz's primary star is classified as a B-type main-sequence star with a mass approximately 3.6 times greater than our Sun.
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In 1885, the spectroscopic binary nature of Alpheratz was first discovered, revealing it consists of two stars orbiting each other with a period of approximately 96.7 days.
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Alpheratz completes one full rotation in approximately 1.3 days, making it a rapidly spinning star that appears visually broadened due to its centrifugal distortion.
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The brightest star in the Andromeda constellation, Alpheratz, is approximately 97 light-years from Earth and has a surface temperature of 13,000 Kelvin.