September 18, 2020: Another go at M27

[michael.h.f.wilkinson]

Gathered 3 hours worth of subs on M27 with the Meade SN6 (6" F/5 Schmidt-Newton) and the ASI183MC (non cooled), with an Optolong L-eNhance filter in place. Tracking was a lot better this time round, initially getting 60s subs without problems, but when one of them turned out eggy stars I opted for 30s subs for safety's sake. All 363 of them turned out well, and stacking in APP and curves and crops in Gimp gave this result:

The outer shell is quite clearly starting to show.

Adding the 2-hours worth of data from September 13 taken with the same rig yields the result below:

and a further merge with 6660 s of data taken with the 80mm F/6 and the same camera gets this:

I will need far more data to get those outer shell fragments out properly (and most likely from a darker site), but it is fun to see how you can stack loads of data and slowly tease out more. I should also get a substantial number of frames without the filter to get the star colours right

[peter shah]

nicely balanced, there is a hint of the outer shell starting to show...nice work

[MarkAR]

Well done, more data to get the outer fans would be great.