NGC 7635 - The Bubble Nebula
This is NGC 7635 - The Bubble Nebula:
I am quite happy with this one. I first took a decent image with my H-alpha-filter which shows the light emitted from the ionized hydrogen. Being very crisp and clear, this image was then, after spending a second night of imaging with just the CLS-filter, mixed with the red-channel making the fainter structures of the nebula stand out nicely. A first is that I used a trial-version of an astronomy image processing software called PixInsight which turned out to be wirth every penny I am about to pay for it.
The nebula is about 7000 lightyears away from us and shows an almost perfect sphere of the shockwave of a young, very hot star that ionizes the hydrogen gas around it.
The actual origin of this bubble is, however, not 100% clear to me, because in other sources the star is referred to as of the type "Wolf-Rayet" which would mean it is actually a dying, supermassive star. So if you know anything about this, please explain it to me.
But the result ist pretty and it was pure fun, to image this object. It took me only two nights with about 5 hours of exposure-time in the first and 4 hours in the second with reasonably low temperatures and almost no technical difficulties.
|Exposure:||33 x 600s, ISO1600 Ha-CCD + 24 x 600s, ISO1600 CLS-CCD|
|Camera:||Canon EOS 1100D, modified|
|Telescope:||10" GSO RC, 1340mm (Astro Physics CCDT67 Reducer)|
|Guiding:||OAG with Lodestar and PHD|
|EIP:||Fitswork, PixInsight and PhotoPlus X6|