Tuesday, November 4, 2008
The Tulip Nebula
Last image for my Cygnus project is the Tulip nebula.
Image is a narrowband color image in different versions.
There is three version of this image here, first image is Hubble palette composition. S-II =RED, H-alpha = GREEN and O-III = BLUE
Second version is a "natural" color composition from narrowband channels, H-alpha 100% + 35%S-II = RED, O-III = GREEN and O-III 100% + 30%H-alpha = BLUE.
The third version is with suopressed stars to show the complex shapes of the nebula.
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Imaging data:
Camera, QHY8 - Filters, Baader 7nm H-alpha, Baader 8,5nm O-III and Baader 8nm S-II - Optics, Tokina AT-X 300mm @ f2.8 -
Exposures, 7X 1200s H-alpha, 1 X 1200 O-III and 1X1200s S-II + flats and bias -
Guiding, LX200 GPS 12" + PHD-guiding and Lodestar
This image is a starless BW version.
It shows a three dimensional nature of this object very well, I think.
Editors' Choice
My Butterfly Nebula image was selected as an "Editors' Choice"
by Sky&Telescope magazine.
Monday, November 3, 2008
NGC6888, the "Crescent Nebula"
NGC6888 in Hubble palette 
"natural" color version 
H-alpha channel
I imagined the "Butterfly Neula" 29.09.2008.
At the time I left NGC6888 out of the field of view
to be able to better frame the Butterly nebula.
You can see part of the NGC6888 at lower right corner of the Butterly nebula image here:
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At this time I wanted to capture the Crescent Nebula with the surraunding nebulosity.
NGC6888 is usually seen in longer focallenght images but I found wider field
as interesting doe the colorful and detailed nebula structure.
Imaging data: Camera, QHY8 - Filters, Baader 7nm H-alpha, Baader 8,5nm O-III and Baader 8nm S-II - Optics, Tokina AT-X 300mm @ f2.8 - Exposures, 4X 1200s H-alpha, 3 X 1200 O-III and 2X1200s S-II + flats and bias - Guiding, LX200 GPS 12" + PHD-guiding and Lodestar
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I made a small mosaic from NGC6888 and the Butterfly Nebula.
The colorful "tale" of the Butterfly spans trough both images.
Sh2-224 & Sh2-223
In this image, there is two supernova remnants!
Both are extremely faint. Exposure time was 15x1200s = 5 hours,
and in final image there was very litle information.
I wanted to try this difficult targe to see can it be imaged from the city center and
with QHY8 color camera. After tweaking the data about an hour, I was able to say, it can.
Image here is a false color image, H-alpha = Red.
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Imaging data:
Camera, QHY8 - Filters, Baader 7nm H-alpha
Optics, Tokina AT-X 300mm @ f2.8
Exposures, 15X 1200s H-alpha, flats and bias
Guiding, LX200 GPS 12" + PHD-guiding and Lodestar
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