First Light on Rosette nebula in six UHC subs (Ewam)

Celestial hemisphere: Northern · Constellation: Monoceros (Mon) · Contains: NGC 2239 · NGC 2244 · Rosette nebula · The star 12Mon

First Light on Rosette nebula in six UHC subs, Ewam

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First Light on Rosette nebula in six UHC subs

Here is my first light on the well known Rosette.

VERSION A : In B&W, to simplify a processing in terrible conditions (no flat made yet, heavy vignette, half moon right above...)

VERSION B : PixInsight editing on the six UHC frames - the gradient HDR compression helped gaining more details, but the Moon 15° or so above my target is just impossible do work with...

That evening, my main goal was M 78 (capturing 1h45min in UHC), but I'm still struggling with the processing, so here is a (simpler?) Rosette nebula that I acquired at the end of my session. The Moon was above the scene, so I get a poor signal to noise ratio. Out 7 frames, one was ruined (still the same issue with my camera) so Iwas left with 5x 300 second plus 1x360 second, all at 6400iso.

Again, this isn't pretty, but I still keep my beginner's "let's share it all" option : here is what you can get with a simple Skywatcher UHC filter, 6 subs, much light pollution and moon...

Next attempt, in a few days under better skies, should be much better ?

RULE N° 722 : SW UHC filters produce halos on brigther stars. On a b&w Rosette, it really does work nicely. Need to gather proper narrow band filters...

Depth of field : down to mag. 16.90 : apparently, UHC filter reduces sensibility by about 1 or 1.5 mag. Or is it also due to the moonshine ?

Original
Final
B

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Status	Basic success
Started	...
Astrometry.net job	559511
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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First Light on Rosette nebula in six UHC subs

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First Light on Rosette nebula in six UHC subs

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