Hemisphere:  Southern  ·  Constellation: Norma (Nor)  ·  Contains:  NGC 6115  ·  NGC6115
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RCW 104—the Ring Nebula Surrounding WR75, 



    
        

            Russ Carpenter
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RCW 104—the Ring Nebula Surrounding WR75

Getting plate-solving status, please wait...
RCW 104—the Ring Nebula Surrounding WR75, 



    
        

            Russ Carpenter
Powered byPixInsight

RCW 104—the Ring Nebula Surrounding WR75

Technical card

Dates:July 19, 2019

Frames: 15x600"

Integration: 2.5 hours

Avg. Moon age: 17.14 days

Avg. Moon phase: 93.73%


Astrometry.net job: 2905590

RA center: 16h 24' 43"

DEC center: -51° 33' 39"

Pixel scale: 0.962 arcsec/pixel

Orientation: -89.944 degrees

Field radius: 0.571 degrees


Resolution: 3063x2982

Data source: Amateur hosting facility

Remote source: ChileScope

Description

Here we have a ring nebula being shaped by the incredibly hot temperatures of Wolf Rayet 75.

I used all three narrowband channels for this image. My first attempt was based on the Hubble Palette, but I was never happy with the result. This attempt used an entirely different approach. I first put together six versions of the image, using all possible combinations of Ha, OIII and SII. In addition, I used Pixelmath to create a “realistic” version with reasonable star colors. The palette that worked best for the nebula was HOS, which I used for the rest of my processing. Downstream, I transferred the stars from the realistic version into the HOS image.

Very few images of RCW 104 exist. That’s surprising, for such an interesting object.

Tech Notes:
ASA Newtonian, 500 mm aperture, 1900mm focal length, F3.6
FLI Proline 16803, 9 mm pixel, 4096 X 4096
ASA DDM85 equatorial mount
Processing with PixInsight and Affinity Photo

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RCW 104—the Ring Nebula Surrounding WR75, 



    
        

            Russ Carpenter