The Rosette Nebula

NGC 2244 also know as the Rosette Nebula is a emission nebula located in the Monoceros constellation.

The nebula is at 5200 light years from earth and is approximately 65 light years wide

 

-Equipment-

Scope: TS-Optics 94/414 EPDH (414mm focal)

Camera: ZWO ASI533MC Pro at -25°C gain 101 offset 49

Guiding: ZWO OAG

Guiding camera: ZWO ASI 120MM

Mount: Skywatcher AZ-EQ6

Filter: Optolong L-eXtreme

 

-Acquisition-

Light : 76x300s

Total integration time 6,3h

Dark: 34x300s Flat-50 Bias-100

Date : 12 January 2022

26,27,28 Febuary 2022

Location : France-Alsace Bortle 4/5

 

-Software-

Carte du Ciel, N.I.N.A, Phd2 , PoleMaster and PixInsight

Ez Processing Suite from darkarcon

darkarcon website : darkarchon.internet-box.ch:8443/

 

-Pre Processing each panels in PixInsight-

Image Calibration

Cosmetic Correction

Debayer

Subframe Selector

Star Alignement

Local Normalization

Image Integration

Drizzle x2

Dynamic crop

 

-Processing

 

DBE MasterLRGB

 

___RGB layer___HOO

Split RGB channels to build Ha and Oiii

Ha=R Oiii= B*0.3+G*0.7

EZ_Soft Stretch

HOO combination with Foraxx formula

R=Ha

G=((Oiii*Ha)^~(Oiii*Ha))*Ha + ~((Oiii*Ha)^~(Oiii*Ha))*Oiii

B=Oiii

Starnet++ for remove stars and build a mask nebula

Color Saturation

Curves Tansformation

Saturate stars for push up stars color

SCNR star mask

Bring back the stars with PixelMath

 

___L layer___

Ez_Deconvolution

Ez_Soft Stretch

Local Histogram Equalization with nebula mask

UnsharpedMask with nebula mask

 

___LRGB___

Ez_Denoise

Final Curve Transformation

Annotation

Save as JPG

 

Clear skies !

 

 

Done