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- Apparent Magnitude: Variable, 0.3 to 1.1 http://www.astro.illinois.edu/~jkaler/so...
- Absolute Magnitude: Variable, -6.2 to -5.4 http://www.astro.illinois.edu/~jkaler/so...
- Distance from Earth: 640 light-years http://www.astro.illinois.edu/~jkaler/so...
- Spectral Class: M2Iab http://www.astro.illinois.edu/~jkaler/so...
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Betelgeuse is a red supergiant star in the constellation Orion. It fluctuates in light emitted; recent observations indicate it may be shrinking. Betelgeuse is one of the stars closest to Earth that is likely to become a supernova in the near future. However, it is too distant to have any significant effect.
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