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Contains:  Bubble nebula, NGC 7635
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Bubble Nebula (NGC 7635) in HRGB @DSW, 


            Miles Zhou
Bubble Nebula (NGC 7635) in HRGB @DSW

Bubble Nebula (NGC 7635) in HRGB @DSW

Technical card

Imaging telescope or lens:RCOS 14.5"

Imaging camera:SBIG STX 16803


Software:PixInsight for Mac

Filters:HaAstrodon luminance filterAstrodon RGBAstrodon O-iii

Resolution: 4096x4096

Dates:Oct. 12, 2016Oct. 26, 2016

Astrodon RGB: 76x300" -20C bin 1x1
Ha: 21x1200" -25C bin 1x1

Integration: 13.3 hours

Avg. Moon age: 18.18 days

Avg. Moon phase: 48.93% job: 1334949

RA center: 23h 20' 47"

DEC center: +61° 12' 3"

Pixel scale: 0.550 arcsec/pixel

Orientation: 5.139 degrees

Field radius: 0.443

Locations: Deep Sky West, Rowe, New Mexico, United States


Bubble Nebula is one of my favorites on the sky. This HRGB did raise some challenge in balancing the H/RGB. I extracted L from RGB and did a max selection.

Version B has Oiii mixed into blue channel, reveals the blue tint of the bubble and the "platform" of it while maintains the background's color.



Miles Zhou
License: None (All rights reserved)


  • Bubble Nebula (NGC 7635) in HRGB @DSW, 


            Miles Zhou
  • Final
    Bubble Nebula (NGC 7635) in HRGB @DSW, 


            Miles Zhou


Mixed Oiii in.

Sky plot

Sky plot


Bubble Nebula (NGC 7635) in HRGB @DSW, 


            Miles Zhou