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tech / sci.astro.amateur / Betelgeuse brightened recently?

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* Betelgeuse brightened recently?Stuart Levy
`* Re: Betelgeuse brightened recently?Quadibloc
 `- Re: Betelgeuse brightened recently?Quadibloc

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Betelgeuse brightened recently?

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Subject: Betelgeuse brightened recently?
From: stuartnl...@gmail.com (Stuart Levy)
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 by: Stuart Levy - Wed, 12 Apr 2023 03:55 UTC

Skywatchers, does it seem as though Betelgeuse has brightened recently?

It seems now about as bright as Rigel and Capella, where it had been clearly dimmer than both. It is outstandingly bright!

Looking at an aavso.org plot of its brightness over the last couple of years, it does seem to have brightened, especially recently. The green path on the plot - maybe this is some running mean of the many observations? - has brightened by about half a magnitude since just early February of this year.

Re: Betelgeuse brightened recently?

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Subject: Re: Betelgeuse brightened recently?
From: jsav...@ecn.ab.ca (Quadibloc)
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 by: Quadibloc - Wed, 12 Apr 2023 14:44 UTC

On Tuesday, April 11, 2023 at 9:55:54 PM UTC-6, Stuart Levy wrote:
> Skywatchers, does it seem as though Betelgeuse has brightened recently?
>
> It seems now about as bright as Rigel and Capella, where it had been clearly dimmer than both. It is outstandingly bright!

Uh, oh. A while back, there were articles about the possibility of it going nova in the near
future, with possible disastrous consequences for Earth. And then articles came along
saying that this possibility was now eliminated.

Your observation suggests that this optimism may have been premature.

John Savard

Re: Betelgeuse brightened recently?

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Subject: Re: Betelgeuse brightened recently?
From: jsav...@ecn.ab.ca (Quadibloc)
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 by: Quadibloc - Wed, 12 Apr 2023 14:48 UTC

On Wednesday, April 12, 2023 at 8:44:59 AM UTC-6, Quadibloc wrote:
> On Tuesday, April 11, 2023 at 9:55:54 PM UTC-6, Stuart Levy wrote:
> > Skywatchers, does it seem as though Betelgeuse has brightened recently?
> >
> > It seems now about as bright as Rigel and Capella, where it had been clearly dimmer than both. It is outstandingly bright!
>
> Uh, oh. A while back, there were articles about the possibility of it going nova in the near
> future, with possible disastrous consequences for Earth. And then articles came along
> saying that this possibility was now eliminated.
>
> Your observation suggests that this optimism may have been premature.
>
But according to this,

https://astronomy.com/news/2020/02/when-betelgeuse-goes-supernova-what-will-it-look-like-from-earth

life on Earth will be unharmed by a Betelgeuse supernova. However, that star will be as bright as
the Moon at first or last quarter.

John Savard

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