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Alpha Orionis (Betelgeuse)

 Note: This page was edited to modify the magnitudes of comparison stars Procyon (0.5 to 0.4 V) and Aldebaran (1.1 to 0.9 V) and to add the link to the chart available via the AAVSO's 10-Star Tutorial. - Elizabeth O. Waagen, 6 January 2020

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