Re: Betelgeuse is "fainting"
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I posted the below elsewhere. Images like yours are rough at best because humidity or seeing could yield the visible differences shown…
Go to https://www.aavso.org/ and enter alf Ori into the search box on the right and hit plot light curve. It might sound bad for lack of a better term but I would then uncheck the visual observations box on the chart. It looks like it has dimmed almost a magnitude since the start of November.
From: DarkSkyNewMexico@groups.io [mailto:DarkSkyNewMexico@groups.io] On Behalf Of Brian Ottum
Sent: Wednesday, January 01, 2020 6:51 PM
Subject: [DarkSkyNewMexico] Betelgeuse is "fainting"
Here’s a side-by-side comparison: 2016 to last night. The old shot was shorter exposure so I equalized exposure in Photoshop. You can see that the field stars are identical in appearance.
A supernova would be the biggest event of our lifetimes. Stay tuned.