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Hemisphere:  Northern
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Purgathofer-Weinberger 1 (PuWe1) in HOO, 


            Douglas J Struble
Purgathofer-Weinberger 1 (PuWe1) in HOO
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Purgathofer-Weinberger 1 (PuWe1) in HOO

Technical card

Imaging telescopes or lenses: Stellarvue SVX102T-R

Imaging cameras: ZWO ASI1600MM-Cool

Mounts: Orion Atlas Pro AZ/EQ-G

Guiding telescopes or lenses: Stellarvue 50mm Guidescope

Guiding cameras: ASI224MC

Focal reducers: Stellarvue SV70T Focal Reducer

Software: PHD2  ·  Sequence Generator Pro  ·  PixInsight  ·  Photoshop CS5  ·  SkySafari Pro

Filters: Astronomik Ha 6nm 1.25''  ·  Astrodon OIII 3nm

Accessory: QHYCCD PoleMaster  ·  ZWO 8x 1.25" Filter Wheel (EFW)  ·  MoonLite CFL 2.5" Large Format Focuser

Dates:Feb. 16, 2020March 5, 2020

Astrodon OIII 3nm: 401x120" (gain: 200.00) -20C bin 1x1
Astronomik Ha 6nm 1.25'': 1256x120" (gain: 200.00) -20C bin 1x1

Integration: 55.2 hours

Darks: ~50

Flats: ~50

Bias: ~250

Avg. Moon age: 16.37 days

Avg. Moon phase: 60.36%

Bortle Dark-Sky Scale: 8.00

Basic astrometry details job: 3307309

RA center: 6h 19' 30"

DEC center: +55° 37' 12"

Pixel scale: 1.104 arcsec/pixel

Orientation: 176.711 degrees

Field radius: 0.452 degrees

Resolution: 2300x1840

Locations: Backyard White Zone Observatory, Taylor, MI, Michigan, United States

Data source: Backyard


This was a very difficult image to process for me. Even with almost 60 hours of integration time, I had to really push the data. I guess that's why it is rarely attempted.

PuWe 1 (PNG 158.9 + 17.8) is a pretty large (about 20 arc minutes diameter) planetary nebula in the constellation of Lynx. It makes it one of the largest planetary nebula in the sky. Its apparent diameter is 2.5 times larger than M27 Dumbbell planetary nebula. It is also one of the closest. It was discovered by Purgathofer and Weinberger in 1980 and is placed about 3500 light years away. Although quite large it is also very faint object, but as visual observers reported possible to see with Oiii filter. Nebula real diameter is about 4 light years.



Douglas J Struble


    Purgathofer-Weinberger 1 (PuWe1) in HOO, 


            Douglas J Struble
    Purgathofer-Weinberger 1 (PuWe1) in HOO, 


            Douglas J Struble
  • Final
    Purgathofer-Weinberger 1 (PuWe1) in HOO, 


            Douglas J Struble


Description: Did a little experimenting with the stars. I color shifted the HOO stars. While I did not capture RGB on the stars, I thought this looked a bit more natural.

Sky plot

Sky plot


Purgathofer-Weinberger 1 (PuWe1) in HOO, 


            Douglas J Struble