Hemisphere:  Southern  ·  Constellation: Orion (Ori)  ·  Contains:  41 the01 Ori  ·  43 the02 Ori  ·  De Mairan's nebula  ·  Great Nebula in Orion  ·  LBN 974  ·  M 42  ·  M 43  ·  NGC 1976  ·  NGC 1982  ·  Sh2-281  ·  The star θ1Ori  ·  The star θ2Ori
Getting plate-solving status, please wait...
M42 center part, a mixed Lum, PI Bi-Color picture, version3, 



    
        

            Niels V. Christensen
Powered byPixInsight

M42 center part, a mixed Lum, PI Bi-Color picture, version3

Getting plate-solving status, please wait...
M42 center part, a mixed Lum, PI Bi-Color picture, version3, 



    
        

            Niels V. Christensen
Powered byPixInsight

M42 center part, a mixed Lum, PI Bi-Color picture, version3

Acquisition details

Dates:
Nov. 4, 2018
Frames:
Integration:
1h 9′ 43″
Avg. Moon age:
26.23 days
Avg. Moon phase:
11.84%

RA center: 05h35m18s.158

DEC center: -05°2347.26

Pixel scale: 0.915 arcsec/pixel

Orientation: -71.083 degrees

Field radius: 0.218 degrees

WCS transformation: thin plate spline

More info:Open 

Resolution: 1379x1019

File size: 675.2 KB

Data source: Backyard

Description

A M42 center mixed Luminance PixInsight Bi-Color Ha, OIII narrowband picture. My 3. & last attempt on a suitable picture processing method.

Thanks to the guys who mentioned/showed this PixInsight pixelmath formula,

RED: iif(HaMixPI>.15,HaMixPI,(HaMixPI*.8)+(OIIIMixPI*.2))

GREEN: iif(HaMixPI>0.5,1-(1-OIIIMixPI)*(1-(HaMixPI-0.5)),OIIIMixPI*(HaMixPI+0.5))

BLUE: iif(OIIIMixPI>.1,OIIIMixPI,(HaMixPI*.3)+(OIIIMixPI*.2))

Usage of the pixelmath function can be seen here, a PC screen shot,

PI pixelmath screenshot

Manually quality sorted frames were stacked like this:

Lum: 68x1sec. SII: 32x10sec+45x30sec. Ha: 35x10sec+30x30sec. OIII: 83x5sec+26x30sec.

More details about the raw matrial can be shown upon request/if needed, thanks a lot.

My home build observatory is placed in my front yard/in the "red light" polution zone, have a look here,

Red Zone

CS Niels

Comments