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Contains:  Bubble nebula, NGC 7635
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The Bubble Nebula (NGC  7635), 


            Dave Swenson
The Bubble Nebula (NGC  7635)

The Bubble Nebula (NGC 7635)

Technical card

Resolution: 4851x3703

Dates:July 19, 2019

Frames: 327x240"

Integration: 21.8 hours

Avg. Moon age: 17.14 days

Avg. Moon phase: 93.73% job: 2841074

RA center: 23h 20' 51"

DEC center: +61° 9' 39"

Pixel scale: 0.414 arcsec/pixel

Orientation: 123.530 degrees

Field radius: 0.351

Data source: Backyard


NGC 7635, also known as the Bubble Nebula, is an emission nebula in the constellation Cassiopeia. Some 7,100 light-years away and 7 light-years across, the Bubble is created by a star at its center some 45 times more massive than our Sun, radiating out tremendous stellar wind and radiation pushing against dense material from a molecular cloud.

Taken from my Bortle 6-ish backyard with the use of narrowband techniques, where each of the 327 images that make up this final photo is taken through one of three filters that eliminate all but specific light wavelengths to be captured, corresponding to Ha, SII, and OIII gases.

Acquisition details (21.7 hours combined):
81 SII @ 240 seconds (5.4 hours)
70 OIII @ 240 seconds (4.6 hours)
176 Ha @ 240 seconds (11.7 hours)



Dave Swenson
License: None (All rights reserved)

Sky plot

Sky plot


The Bubble Nebula (NGC  7635), 


            Dave Swenson