The Rosette Nebula

This has been my great white whale for the last couple of months. It’s in the south in the winter which makes it tricky from my back yard. Last night I went to a nearby park where I have a view to the south over farmland. With the snow gone I was able to get 30 100 second subs at 800 ISO through the william optics z61(360mm f/6). I had to stand for the better part of an hour blocking a streetlight but it seemed worth it. There was a pretty strong gradient in the subs but I found a new siril script that seems to do a good job knocking down gradients. Probably a few weeks ago at the last new moon would have been better but i’ll take this for now. The blotch at around 2 o’clock is dust that wasn’t mitigated by my flats. Besides the script I would have used siril’s auto-stretch histogram, the asinh function to raise the blackpoint and colour saturation to boost the colour.

I’ve been looking lately at all-in-one astrophotography solutions like stellina or the EVscope. It’s not that i can’t get decent results but it’s a lot of hacking around in the field and after the fact.

The Rosette Nebula Seems Challenging

Maybe there’s some faint hint of nebulosity there but i can’t see it. This is only nine 45 second lights at ISO 800 through the Z61 so f/5 360mm. I have a streetlight in exactly the wrong spot although i could have done better.

I know my aim is good based on the astrometry output below.