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Messier 33 (HaRGB), 



    
        

            Linda
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Getting plate-solving status, please wait...
Messier 33 (HaRGB), 



    
        

            Linda
Powered byPixInsight

Acquisition details

Dates:
Oct. 24, 2019 ·  Oct. 25, 2019 ·  Oct. 28, 2019 ·  Oct. 29, 2019 ·  Nov. 24, 2019 ·  Nov. 25, 2019 ·  Nov. 26, 2019 ·  Dec. 19, 2019 ·  Dec. 20, 2019 ·  Jan. 19, 2020 ·  Jan. 20, 2020 ·  Jan. 21, 2020 ·  Jan. 22, 2020 ·  Jan. 23, 2020
Frames:
Astrodon Gen2 I-Series Tru-Balance Blue: 66×60(1h 6′) (gain: 15.00) -15°C bin 1×1
Astrodon Gen2 I-Series Tru-Balance Blue: 83×60(1h 23′) (gain: 25.00) -10°C bin 1×1
Astrodon Gen2 I-Series Tru-Balance Blue: 151×60(2h 31′) (gain: 25.00) -15°C bin 1×1
Astrodon Gen2 I-Series Tru-Balance Green: 101×60(1h 41′) (gain: 15.00) -15°C bin 1×1
Astrodon Gen2 I-Series Tru-Balance Green: 7×60(7′) (gain: 25.00) -10°C bin 1×1
Astrodon Gen2 I-Series Tru-Balance Green: 172×60(2h 52′) (gain: 25.00) -15°C bin 1×1
Astrodon Gen2 I-Series Tru-Balance Red: 112×60(1h 52′) (gain: 15.00) -15°C bin 1×1
Astrodon Gen2 I-Series Tru-Balance Red: 16×60(16′) (gain: 25.00) -10°C bin 1×1
Astrodon Gen2 I-Series Tru-Balance Red: 172×60(2h 52′) (gain: 25.00) -15°C bin 1×1
Astrodon H-alpha 3nm: 5×240(20′) (gain: 139.00) -15°C bin 1×1
Astrodon H-alpha 3nm: 40×300(3h 20′) (gain: 139.00) -15°C bin 1×1
Astrodon H-alpha 3nm: 31×300(2h 35′) (gain: 200.00) -15°C bin 1×1
Integration:
20h 55′
Darks:
50
Flats:
25
Flat darks:
50
Avg. Moon age:
22.55 days
Avg. Moon phase:
13.53%
Bortle Dark-Sky Scale:
7.00

RA center: 01h33m50s.44

DEC center: +30°3828.0

Pixel scale: 1.622 arcsec/pixel

Orientation: -45.034 degrees

Field radius: 0.843 degrees

More info:Open 

Resolution: 3228x1888

File size: 544.1 KB

Locations: Home, Broadlands, VA, United States

Data source: Backyard

Description

I had posted this RGB version thinking my h-alpha filter was not going to arrive for some time. However, it arrived just after posting and the brief run of clear nights a week ago I was able to get some h-alpha data on this. I was able to get 6 hours and 20 minutes of new h-alpha data.

Unlike the other version I decided not to drizzle mostly so I could use Mure Denoise.

I found combining the data challenging. I tried the NBRGBCombination script tended to overemphasize the h-alpha and even when dialed back added in too much noise to the image. I suspect I need to learn how to use the script better. Instead what I did was to make a mask from the h-alpha data and applied that to the RGB data while still linear. Then used pixel math to substitute the h-alpha data into the RGB image but only where h-alpha appeared in the image. That seemed to work pretty well. The h-alpha shows up clearly but isn't too intense.

I tried to find the right balance between contrast and saturation here and I think I like this version better than the previous version. It has less detail since it isn't drizzled but it also has less visible noise.

Comments

Revisions

  • Messier 33 (HaRGB), 



    
        

            Linda
    Original
  • Final
    Messier 33 (HaRGB), 



    
        

            Linda
    B

B

Description: forgot to run sharpening on the original

Uploaded: ...

Sky plot

Sky plot

Histogram

Messier 33 (HaRGB), 



    
        

            Linda