Betelgeuse Fading

Something is definitely not right with Orion. For anyone familiar with the sky the constellation just looks wrong with Betelgeuse at half its normal brilliance.

We have long known Betelgeuse is a dying star, in the last stages of its life. Old stars tend to be unstable, changing in brightness. Betelgeuse has always varied a bit, but this is the largest change on record.

The magnitude of Betelgeuse over the past 35 years, data from the AAVSO
The magnitude of Betelgeuse over the past 35 years, data from the AAVSO

It is odd to see such an iconic star change so dramatically, a reminder that not even the stars are permanent.

Orion with a faint Betelgeuse changing the appearance of this familiar constellation
Orion with a faint Betelgeuse changing the appearance of this familiar constellation, photo taken December 29, 2019

The photo tends to flatten the magnitude of stars, the difference is not as obvious. You need to step outside and look for yourself. Orion currently rises late in the evening.

Author: Andrew

An electrical engineer, amateur astronomer, and diver, living and working on the island of Hawaiʻi.

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