Iris and Ghost nebula (2nd attempt) (Michał Kostrzewa)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: Iris Nebula · NGC 7023

Iris and Ghost nebula (2nd attempt)

My 2nd attempt at Iris nebula.

Taken during "Astrozloty" spring conference in Bieszczady, 2021, over 2 nights.

Processing:

PixInsight

* Crop

* DBE 2 times

* TGVDenoise & MMT (https://jonrista.com/the-astrophotographers-guide/pixinsights/effective-noise-reduction-part-2/)

* Masked stretch

* LRGBCombination (bump stretch using illumination mask)

* Backgrouind neutralization

* Color calibration

* Morphological Transformation (star reduction, https://www.lightvortexastronomy.com/tutorial-reducing-star-sizes.html#Section1)

* DBE (again)

* Curves Transformation (Saturation)

* Background neutralization (again)

Gimp

* Rotate 180 & Crop

---

Notes:

* I had to crop quite a bit (I used a full frame camera), because I think I have tilt issue (stars on the left are larger), and still haven't figured out correct distance for coma corrector.

* I have some color blotches, that's why I used DBE 3 times in total (though I probably introduced some blotches because of it...)

Final
Original
C

C

Description: Increased temp, contrast and saturation

Uploaded: ...

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Status	Basic success
Started	...
Astrometry.net job	4503822
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Iris and Ghost nebula (2nd attempt)

Iris and Ghost nebula (2nd attempt)

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Iris and Ghost nebula (2nd attempt)

Iris and Ghost nebula (2nd attempt)

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