Colour evolution of Betelgeuse over two millennia, derived from records

Re:Colour evolution of Betelgeuse over two millennia, derive... by vanderZwan on Tuesday August 16, 2022 @11:08AM (#32483796)

I'm really curious how they accounted for many color names being relatively recent, including basic things like "blue".

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Re:Colour evolution of Betelgeuse over two millennia, derive... by ctrlmeta on Tuesday August 16, 2022 @11:23AM (#32484030)

> Hyginus (Rome) and Sima Qian (China) independently report it two millennia ago as appearing like Saturn (B−V=1.09 ± 0.16 mag) in colour and ‘yellow’ (quantifiable as B−V=0.95 ± 0.35 mag), respectively (together, 5.1σ different from today).

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Re:Colour evolution of Betelgeuse over two millennia, derive... by vanderZwan on Wednesday August 17, 2022 @07:14AM (#32494703)

> appearing like Saturn

Ah, that's a smart workaround!

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