Bubble Neb­ula (NGC 7635) in Cassiopeia

About 1/​2° south­w­est of the open cluster M52 in the con­stel­la­tion of Cas­si­opeia, one can find the emis­sion neb­ula NGC 7635 known as Bubble Neb­ula and Cald­well 11. Like Thor’s Hel­met (NGC 2359) or Cres­cent Neb­ula (NGC 6888), a Wolf-Rayet star is repons­ible for the shape of this object. This star, BD 65 2522, the bright­est star (8.5mag) with­in the bubble, is blow­ing away the inter­stel­lar mater­i­al by its radi­ation power. The HII region itself is cata­loged as Sharp­less 162.

In this image, the Ha data was blen­ded to the lumin­ance chan­nel only to pre­serve the nat­ur­al col­ors as good as pos­sible. North is about upper left of the image.

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RCOS 14.5″ f/​8
ASA DDM85
Apo­gee U16M
Astro­don Gen2
HaLRGB 960:600:340:340:300 min.
ROSA Remote Obser­vat­or­ies South­ern Alps
© Mar­tin Ruster­holz, Astrophotographer

Find­er Chart Bubble Neb­ula (NGC 7635) in Cassiopeia

Bubble Nebula Sky Chart - Astrophotography Martin Rusterholz

Image cre­ated by Skychart