Automatic aperture

Did you literally stack 1B with 1V and 1I? I assume not??

I have only 3 images: 1B, 1 I, and 1 V

Same target V0605_Cas

You don’t want to stack 3 images of different filters. Just measure them separately.

Why are you trying to stack them?

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I chose the wrong date in the list…
fixed it,

Thanks!