I did this as a test shot using shorter sub-exposures. This is 9 ten-minute images. I am not sure I gained anything with more images to stack. I think my set-up works best with 13 minute minimum sub-exposures. The faint outer shell was visible, but was exceedingly noisy, so I had to tone it way down during processing. The longer subs would have brought it out.
I did this with my ST7 and C6 at F6.3
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