Celestial hemisphere:  Northern  ·  Constellation: Cepheus (Cep)  ·  Contains:  HD200775  ·  LBN 487  ·  LDN 1174  ·  NGC 7023
Iris Nebula in LRGB, NGC 7023 - 17hr stack, Vikas Sahota
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Iris Nebula in LRGB, NGC 7023 - 17hr stack

Acquisition type: Electronically-Assisted Astronomy (EAA, e.g. based on a live video feed)
Iris Nebula in LRGB, NGC 7023 - 17hr stack, Vikas Sahota
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Iris Nebula in LRGB, NGC 7023 - 17hr stack

Acquisition type: Electronically-Assisted Astronomy (EAA, e.g. based on a live video feed)

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Description

I had made several attempts on the Iris nebula back in May, and back to it a few days ago. Each effort yielded something but not enough. I decided to try and stack all the various sessions together, bit of a challenge but interesting if it worked. Early sessions were saved out in png so had to go converting lots of lights, flats, darks, bias, sifting through the subs and getting everything together to feed into AstroPixel Processor.

Its definately not optimal by any means, between the sessions things changed and I didnt intend to stack this lot together when I set out

So its a mix if different camera gains, with/without focal reducer, slightly different imaging train, filters, as things evolved.

Integration : 566 light frames, 17.6 hours

Luminance : Skytech LPRO , 9.6hours

Baader-R or LPRO + Baader-R : 2.5hours

Baader-G or LPRO + Baader-G : 2.5hours

Baader-B or LPRO + Baader-B : 3hours

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Iris Nebula in LRGB, NGC 7023 - 17hr stack, Vikas Sahota