Bubble Nebula (NGC 7635) - RGB + HaOIII (Jon Gascoyne)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: Bubble Nebula · HD220057 · LBN 548 · LBN 549 · NGC 7635 · Sh2-162

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Bubble Nebula (NGC 7635) - RGB + HaOIII

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Bubble Nebula (NGC 7635) - RGB + HaOIII

NGC 7635, also known as the Bubble Nebula, Sharpless 162, or Caldwell 11, is an H IIregion emission nebula in the constellation Cassiopeia. It lies close to the open cluster Messier 52. The "bubble" is created by the stellar wind from a massive hot, 8.7 magnitude young central star, SAO 20575 (BD+60°2522). The nebula is near a giant molecular cloud which contains the expansion of the bubble nebula while itself being excited by the hot central star, causing it to glow.

Data provided by @Insight Observatory - AFIL-7 telescope, Remote Skygems Observatories, Nerpio, Spain.
Available from the Starbase website https://starbase.insightobservatory.com/inventory

RGB nebulosity & stars, with continuum-subtracted Ha and OIII blended into the red and blue channels respectively. SII not used. Continuum subtraction was undertaken using the synthetic colour flow method described by @Charles Hagen in his Night Photons blog (https://www.nightphotons.com/guides/advanced-narrowband-combination). Not sure I got it right but I like the outcome all the same

Emission Nebulae
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Status	Advanced success
Started	...
Astrometry.net job	9458711
PixInsight job	N7AJBATNY5L04E9DLL791DABBBQUZWOF
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	23h20m40s.940
RA (top/left)	23h21m35s.840
RA (top/right)	23h21m35s.151
RA (bottom/right)	23h19m43s.958
RA (bottom/left)	23h19m45s.675

Dec (center)	+61°10′32″.61
Dec (top/left)	+61°01′18″.20
Dec (top/right)	+61°19′52″.35
Dec (bottom/right)	+61°19′44″.78
Dec (bottom/left)	+61°01′11″.59

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Bubble Nebula (NGC 7635) - RGB + HaOIII

Bubble Nebula (NGC 7635) - RGB + HaOIII

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Bubble Nebula (NGC 7635) - RGB + HaOIII

Bubble Nebula (NGC 7635) - RGB + HaOIII

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