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Contains:  Bubble nebula, NGC 7635, NGC 7538, NGC 7510
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Bubble Nebula and Friends (bicolor), 


            John Renaud
Bubble Nebula and Friends (bicolor)

Bubble Nebula and Friends (bicolor)

Technical card

Resolution: 2699x2152

Dates:Aug. 4, 2016Aug. 5, 2016Aug. 6, 2016Aug. 7, 2016Aug. 8, 2016Aug. 9, 2016

Astrodon 3nm OIII: 62x600" -5C bin 1x1
Astrodon 5nm Ha: 75x600" -5C bin 1x1

Integration: 22.8 hours

Darks: ~20

Flats: ~50

Bias: ~100

Avg. Moon age: 3.98 days

Avg. Moon phase: 18.73% job: 1196712

RA center: 349.196 degrees

DEC center: 60.664 degrees

Pixel scale: 2.649 arcsec/pixel

Orientation: -90.768 degrees

Field radius: 1.270 degrees


The Bubble Nebula is an emission nebula some 7000-11000 light years away, in the constellation Cassiopeia. A massive star at the center of the bubble is emitting a fierce stellar wind of ionized gas that excites the inner layers of the nebula cloud, causing them to glow. The bubble itself is between 3 and 5 light years in diameter.

Also visible is the distinctive Lobster Claw Nebula (aka Sharpless 2-157), another bright emission nebula in the constellation Cassiopeia. Just below the bottom pincer is NGC 7510, a small, young open star cluster in the constellation Cepheus, near the border of Cassiopeia. NGC 7538 (seen in the lower right) is an active star forming nebula that hosts the largest known protostar, NGC 7538S. The star hasn't finished forming but conditions are right for it to form into a high mass B star.



John Renaud
License: None (All rights reserved)


  • Bubble Nebula and Friends (bicolor), 


            John Renaud
  • Final
    Bubble Nebula and Friends (bicolor), 


            John Renaud

Sky plot

Sky plot


Bubble Nebula and Friends (bicolor), 


            John Renaud

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