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Contains:  Eskimo nebula, NGC 2392
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NGC-2392 (Clown Nebula), 


            Joel Shepherd
NGC-2392 (Clown Nebula)
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NGC-2392 (Clown Nebula)

Technical card

Imaging telescope or lens:EdgeHD 8

Imaging camera:Atik 460EX Mono

Mount:Advanced VX

Guiding telescope or lens:EdgeHD 8

Guiding camera:Lodestar X2

Software:PixInsight 1.8

Filters:Astrodon 5nm SIIAstrodon 5nm H-alphaAstrodon 5nm Olll

Dates:Jan. 2, 2017Jan. 3, 2017

Astrodon 5nm H-alpha: 12x300" -20C bin 1x1
Astrodon 5nm Olll: 12x300" -20C bin 1x1
Astrodon 5nm SII: 12x300" -20C bin 1x1

Integration: 3.0 hours

Avg. Moon age: 4.51 days

Avg. Moon phase: 21.43%

Bortle Dark-Sky Scale: 6.00

Temperature: -2.00

Basic astrometry details job: 1410582

RA center: 7h 29' 10"

DEC center: +20° 54' 50"

Pixel scale: 0.479 arcsec/pixel

Orientation: 166.453 degrees

Field radius: 0.106 degrees

Resolution: 1281x960

Locations: Home, Seattle, WA, United States


Subject: NGC-2392 (Clown Nebula) in Gemini. Discovered by William Herschel in 1787; about 2870 light-years distant and roughly 48" in diameter.

Capture notes: This was my first and maybe overly ambitious effort with a Celestron Edge HD8 I picked up in October. Not surprisingly, my AVX struggled with the weight -- especially with the imaging train attached -- but I was expecting much worse. Hoping to use the scope, possibly with a beefier mount, for galaxy season. In retrospect I probably should have taken more, shorter exposures.

Processing: The normal narrowband pallettes seemed either much too green or much too magenta. I ended up doing something off the wall and mapping O-iii to red, Ha to green and S-ii to blue.



Joel Shepherd
License: Attribution Creative Commons

Sky plot

Sky plot


NGC-2392 (Clown Nebula), 


            Joel Shepherd