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NGC7635 Bubble Nebula Ha

PostPosted: Wed Oct 07, 2015 3:09 pm
by nightcasper
22 x 10 min subs taken from my back garden in Birmingham UK. Here's a link to my Flickr page https://flic.kr/p/zgbvKL


Optics: Takahashi Baby Q FSQ-85ED F5.3

Camera: Xpress Trius SX-694 Mono Cooled to -20C

Guiding: ST80, Lodestar X2

Filter: Baader Ha

Mount: Skywatcher AZ EQ6-GT EQ & Alt-Az Mount connected to the Sky X and Eqmod via HitecAstro EQDIR adapter

Image Acquisition: Sequence Generator Pro

Stacking and Calibrating: Pixinsight

Processing: Pixinsight 1.8, Photoshop CC

Re: NGC7635 Bubble Nebula Ha

PostPosted: Wed Oct 07, 2015 3:26 pm
by Jam
Nice one! Very popular area at the moment! ;)

Re: NGC7635 Bubble Nebula Ha

PostPosted: Fri Oct 09, 2015 4:22 pm
by Thom
That's really impressive, David. I was there the other night to check out that bubble that looked so alluring in Stellarium. I tried at 2700 mm focal length with my 8" newton and a Baader UHC-S filter from my light polluted backyard. But all I could get on my uncooled Canon 450Da during 4x10 min was a part of the rim of the bubble. Your example is really encouring for me to try harder. Thanks for sharing!

Thom

Re: NGC7635 Bubble Nebula Ha

PostPosted: Fri Oct 09, 2015 7:14 pm
by paraman
Thom wrote:That's really impressive, David. I was there the other night to check out that bubble that looked so alluring in Stellarium. I tried at 2700 mm focal length with my 8" newton and a Baader UHC-S filter from my light polluted backyard. But all I could get on my uncooled Canon 450Da during 4x10 min was a part of the rim of the bubble. Your example is really encouring for me to try harder. Thanks for sharing!

Thom

The bubble and surrounding area are mostly hydrogen alpha targets so without the appropriate Ha filter you will find it very difficult.

Re: NGC7635 Bubble Nebula Ha

PostPosted: Sat Oct 10, 2015 11:22 am
by Thom
The bubble and surrounding area are mostly hydrogen alpha targets so without the appropriate Ha filter you will find it very difficult.


Isn't there also some OIII as well? I've chosen the UHC-S to have a window in Ha and OIII simultaneously. Maybe it's not narrow enough in Ha for my level of light pollution, but the idea was to save time.

Thom

Re: NGC7635 Bubble Nebula Ha

PostPosted: Thu Nov 12, 2015 7:09 pm
by galactic_eagle631
Nice Ha image and processing David.
You can try up to 1080 sec/sub (18 min) if your sky permit it. You'll reveal more nebulosity. :)

Re: NGC7635 Bubble Nebula Ha

PostPosted: Thu Nov 12, 2015 7:36 pm
by Wide-Field
:thumbsup: Very nice indeed

Re: NGC7635 Bubble Nebula Ha

PostPosted: Mon Mar 14, 2016 1:27 am
by patthehorse
Thom wrote:That's really impressive, David. I was there the other night to check out that bubble that looked so alluring in Stellarium. I tried at 2700 mm focal length with my 8" newton and a Baader UHC-S filter from my light polluted backyard. But all I could get on my uncooled Canon 450Da during 4x10 min was a part of the rim of the bubble. Your example is really encouring for me to try harder. Thanks for sharing!

Thom

Hardly any OIII in the region close to the bubble, here's a single 600s sub in OIII and a Ha for comparison. Both have had the same stretch in PS.
OIIIImage

and the Ha
Image
Pretty sure there wasn't any SII either only tried 1 sub though.

Re: NGC7635 Bubble Nebula Ha

PostPosted: Mon Mar 14, 2016 1:29 am
by patthehorse
Forgot about your image Dave. That's one damn fine image. :thumbsup: