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.
Details
Telescope:
RCOS 14.5″ f/8
Mount:
ASA DDM85
Camera:
Apogee U16M
Filters:
Astrodon Gen2
Exposure:
HaLRGB 960:600:340:340:300 min.
Location:
ROSA Remote Observatories Southern Alps
Author:
© Martin Rusterholz, Astrophotographer
Hello, my name is Martin Rusterholz. I’m a Swiss amateur astrophotographer living near Zurich, the biggest town in Switzerland. My interest in astronomy started when I was 16. At that time, I built my first Newtonian telescope and mount. I studied physics at the Swiss Federal Institute of Technology (ETH) which was the only study including at least some aspects of astronomy and astrophysics.
“Looking at the nights sky is an experience touching everybody deeply inside, something common to all human beings independent to the language spoken by the individuals”.
Deep-sky astrophotography is my passion.