RCW 74 ( HaRGB)

 

An image in Ha RGB

 

This nebula according to Glaxy Map

 

is

 

"GRS 305.40 +00.20 (Kes 18), often named simply G305, is a major star formation region associated with several HII regions, the star clusters Danks 1 and Danks 2, an estimated 31 O stars and the Wolf-Rayet star WR 48a. It may be one of the most massive star formation regions known in the Milky Way"

 

Location : Bortle 6

 

Equipment

Sharpstar z4/Antlia 3 nm Ha filter/ Antlia Triband RGB filter/ZWO 533 Mm pro -for H-alpha /6/533 MC pro for RGB colour/ASIAIR/HEQ5/ASIAIR

 

Data

 

just under one and a half hours in RGB (5 minute subs)

 

3 hours in Ha (10 minute subs)

 

10 minutes in RGB ( 60 second subs) -for stars

 

 

Processing

 

stacked in AstroPixelProcessor, processed in PixInsight

 

Processing Notes

Ha and RGB separately

 

Stack

register Ha, RGB long and RGB short stacks

Dynamic Crop

Gradient Correction

Blur X -correction

Image Solver

SPCC

Starnet++

 

Nebula

BlurX

NoiseX

GHS

NoiseX

 

Curves Transformation

 

Stars

 

SetiAstro star stretch script

 

 

Curves Transformation after applying a luminance mask

 

Stars and starless combined with Pixelmath

 

Minor tweaking including a final crop - in Photoshop CS6

 

 

 

Done