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Contains:  M 43, NGC 1982, NGC 1977, NGC 1980, M 42, Great Nebula in Orion, NGC 1976, NGC 1975, NGC 1973, The star 45Ori, The star ιOri, The star θ2Ori, The star θ1Ori, The star 42Ori
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Narrow band - bicolor M42, 


            Edoardo Luca Radi...
Narrow band - bicolor M42

Narrow band - bicolor M42

Technical card

Imaging telescope or lens:Astrobin Public data Pools


Resolution: 4016x3992 job: 290218

RA center: 83.832 degrees

DEC center: -5.390 degrees

Pixel scale: 1.580 arcsec/pixel

Orientation: -100.319 degrees

Field radius: 1.243 degrees


Here my Interpretation of M42 in narrow band.
Data from Astrobin Public Data from user davidng

The workflow was all in PixInsight 1.8:

1) Since Ha data were saturated in the core of the nebula I composed Ha and SII data with GradientHDRComposition producing a linear HDR image
2) Linear fit of OIII on Ha-SII composite
3) DynamicAlignement of OIII on Ha-SII composite
4) AutoHistogram with Logarithmic transformation on both images
5) Denoise of OIII data with ACDNR
6) Bicolor composition with Steve Cannistra technique adapted to PixInsight using PixelMath
(read my tutorial here

7) LRGB composition using Ha-SII composite as lightness
8) BackgroundNeutralization
9) MaskedStretch to enhance faint nebulosity
10) HDRMultiscaleTransform to compress the 64bit color range (with mask)
11) Curves transformation and saturation
12) LocalHistogramEqualization (with mask)
13) SCNR for green reduction
14) Curves final tuning

per gli amici italiani il tutorial sulla composizione di Steve Cannistra è disponibile anche in italiano.



Edoardo Luca Radi...
License: Attribution-NonCommercial-NoDerivs Creative Commons

Sky plot

Sky plot


Narrow band - bicolor M42, 


            Edoardo Luca Radi...

In these public groups

Imagers of Italy