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Star Halo Explanation?


scitmon

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Just stacked my M31 image and noticed one star has a significant halo.  Is it unusual just to have one star with a halo?  What's the probable cause? 

The image was taken with: SW 80ED Pro -> IDAS D2 LP Filter -> ZWO ASI 294 MC Pro

 

halo.png

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On 23/11/2021 at 21:46, scitmon said:

Just stacked my M31 image and noticed one star has a significant halo.  Is it unusual just to have one star with a halo?  What's the probable cause? 

The image was taken with: SW 80ED Pro -> IDAS D2 LP Filter -> ZWO ASI 294 MC Pro

 

halo.png

I have seen it before when only deep red stars produce a halo on some filters.

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