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Contains:  Cat's Eye Nebula, IC4677, NGC 6543, NGC6543, PK096+29.1
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NGC 6543 – Cat’s Eye Nebula - Closeup View, 


            Gary Imm
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NGC 6543 – Cat’s Eye Nebula - Closeup View

Imaging telescopes or lenses: Celestron EdgeHD 11

Imaging cameras: ZWO ASI 1600MM Cooled Pro

Mounts: Astro-Physics Mach1GTO

Guiding cameras: ZWO ASI174MM

Software: PixInsight  ·  Main Sequence Software Sequence Generator Pro  ·  Stark Labs PHD2 2.6.3

Filters: Astrodon Ha 31mm 5nm  ·  Astrodon Green 31mm Gen2 I-Series  ·  Astrodon Blue 31mm Gen2 I-Series  ·  Astrodon Red 31mm Gen2 I-Series  ·  Astrodon OIII 31mm 3nm

Accessory: ZWO EFW  ·  Celestron OAG  ·  MoonLite Focuser for EdgeHD 11

Dates:June 8, 2020June 9, 2020June 11, 2020

Astrodon Blue 31mm Gen2 I-Series: 30x120" (gain: 139.00) -20C bin 1x1
Astrodon Green 31mm Gen2 I-Series: 30x120" (gain: 139.00) -20C bin 1x1
Astrodon Ha 31mm 5nm: 60x10" (gain: 300.00) -20C bin 1x1
Astrodon Ha 31mm 5nm: 30x300" (gain: 300.00) -20C bin 1x1
Astrodon OIII 31mm 3nm: 60x10" (gain: 300.00) -20C bin 1x1
Astrodon OIII 31mm 3nm: 30x300" (gain: 300.00) -20C bin 1x1
Astrodon Red 31mm Gen2 I-Series: 30x120" (gain: 139.00) -20C bin 1x1

Integration: 8.3 hours

Avg. Moon age: 18.93 days

Avg. Moon phase: 80.62% job: 3644948

RA center: 17h 58' 33"

DEC center: +66° 38' 0"

Pixel scale: 0.282 arcsec/pixel

Orientation: -0.830 degrees

Field radius: 0.109 degrees

Resolution: 2184x1732

Locations: Backyard (Mag 20.8 - New Moon), Onalaska, Texas, United States

Data source: Backyard


This object is a planetary nebula located about 3300 light years away in the constellation of Draco at a declination of +67 degrees. The outer section of the nebula spans 5 arc-minutes in our apparent view, equivalent to 5 light years, while the bright inner section spans 30 arc-seconds, equivalent to 0.5 light years.

This object is a beautiful and often viewed planetary nebula. The inner "eye" gives the object its name (and which is the only part of this object usually able to be viewed visually). The beautiful wispy hexagon-shaped gas exterior is primarily comprised of oxygen. This dying star has ejected rings of gas in several phases - the oldest from about 60,000 years ago in the outermost edge, while the very bright inner portions are from ejections around 1,000 years ago.

Like the Orion Nebula, this bright and popular object is surprisingly hard to image well. I imaged it a few years ago but never captured much detail in the bright inner region. The inner portion is tremendously bright while the outer regions are incredibly dim. Each section can be imaged separately with different exposure times, but the processing of the transition region is the tough part. I gave it another try here but I am still not completely satisfied with it.



Gary Imm
License: Attribution-NonCommercial Creative Commons

Sky plot

Sky plot


NGC 6543 – Cat’s Eye Nebula - Closeup View, 


            Gary Imm