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Sh2 169 and Sh2 168 H-alpha RGB, 





    
        

            jerryyyyy
Sh2 169 and Sh2 168 H-alpha RGB

Sh2 169 and Sh2 168 H-alpha RGB

Technical card

Resolution: 1500x1260

Dates:Sept. 28, 2019

Frames:
Astrodon Blue Tru-Balance E-Series Gen 2: 12x240" bin 1x1
Astrodon Green Tru-Balance E-Series Gen 2: 12x240" bin 1x1
Astrodon H-alpha 5nm: 32x1800" bin 1x1
Astrodon Red Tru-Balance E-Series Generation 2: 12x240" ISO-1 bin 1x1

Integration: 18.4 hours

Avg. Moon age: 29.22 days

Avg. Moon phase: 0.11%

Astrometry.net job: 2950254

RA center: 358.397 degrees

DEC center: 60.423 degrees

Pixel scale: 1.219 arcsec/pixel

Orientation: 359.873 degrees

Field radius: 0.332 degrees

Data source: Own remote observatory

Remote source: Non-commercial independent facility

Description

Sh2 169 is the lower left and Sh2 168 is the upper right.

Sh2 was on my undone list but eventually while working on it I realized the blob in the upper right looked familiar. I eventually came to realize that we shot it with Rob scope two years ago. Thus with a little work we could combine the H-alpha from the two efforts to bring out the duller Sh2 168.

I found a well-done similar image on Astrobin:

https://www.astrobin.com/369218/?nc=user

Stefan had a nice explanation of the two, which I quote here "with credit":

Large parts of Sh2-168 appear almost completely structureless. The center is much brighter, slightly striped and sits like a shield hump in the middle of the fog. In the northeast, a ragged dark cloud appears to be sliding in front of Sh2-168, making the fog look gnawed. The neighbor Sh2-169 looks completely structureless and is dominated by the stimulating star in its center. In the southeast, the fog is sharply defined, while in other places it diffuses diffusely into the background.

Comments

Author

jerryyyyy
jerryyyyy
License: None (All rights reserved)
530
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Revisions

  • Sh2 169 and Sh2 168 H-alpha RGB, 





    
        

            jerryyyyy
    Original
  • Final
    Sh2 169 and Sh2 168 H-alpha RGB, 





    
        

            jerryyyyy
    B

B

RGB with HA added to Red and L.

Sky plot

Sky plot

Histogram

Sh2 169 and Sh2 168 H-alpha RGB, 





    
        

            jerryyyyy