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Ten year light curve for Betelgeuse


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About this observation
Tracie Heywood
Time of observation
26/12/2018 - 12:06
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Here is my light curve for Betelgeuse since 2009.

Since it is often claimed (usually by people who don't actually observe the star) that Betelgeuse routinely varies between magnitudes 0.0 and 1.3, I thought that it would be useful to post a long term light curve that shows the typical range is only a few tenths of a magnitude.

Betelgeuse can sometimes appear to be somewhat brighter or fainter than the range observed here, but my 40 year experience of observing it has revealed that this is only the case when observing under poor sky conditions or when there are significant altitude difference between Betelgeuse and its comparison stars.

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