Monday, November 10, 2008
Sh2-157
My Sharpless Catalog project continue with Sh2-157.
Sh2-157 is a faint large nebula. Famous Bubble Nebula can be seen in upper left corner.This nebula looks like a gigant termite head to me.
Three versions precented here, first is in a Hubble palette,
second in "natural" colors and
third is an image with reduced stars to better show nebulosity, there seems to be lots offaint double ionized Sulfur (S-II) around.
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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, 5X 1200s H-alpha, 2 X 1200 O-III and 2X1200s S-II + flats and bias - Guiding, LX200 GPS 12" + PHD-guiding and Lodestar
Sunday, November 9, 2008
IC405 & IC410
It's nice to make a black and white image
after so colorfull shots.
In the image there is two main objects, IC410 and IC405, sometimes
called as a "Flaming Star Nebula".
IC405 is a emission nebula but it has reflecting nebulosity too.
In my heavily lightpolluted location it's not easy to capture.
Trough Hydrogen alpha filter just emission part is captured.
Some info in Wikipedia: http://en.wikipedia.org/wiki/IC_405
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Imaging data:
Camera, QHY8 - Filters, Baader 7nm H-alpha - Optics, Tokina AT-X 300mm @ f2.8
- Exposures, 5X 1200s H-alpha + flats and bias - Guiding, LX200 GPS 12" + PHD-guiding and QHY5
Editted 9.11.
Ok. I can't live without colors, let's face it,
so I added this false color Ha-composition here.
Red = Starless Ha 100% R = 0% B = 17% Ha (Works as a H-beta substitute)
Friday, November 7, 2008
APOD
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My "Cygnus Trio" mosaic was selected as an "Astronomy Picture of the Day" by
the NASA.
You can see the NASA page here:
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The Image
Thursday, November 6, 2008
The California Nebula, NGC1499
S-II, H-a and O-III composition, Hubble palette 
H-a+35%S-II, O-III and O-III+30%H-a, "Natural color" composition 
to better show actual nebulosity
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This image looks very different, than images of California Nebula usually do.
There is two reasons.
First is, that this is a three color narrowband image, there is not
too many of them, least I haven't seen one.
Second reason is,
that image is "upside down" compared to usual precentation format.
I did this for a reason, narrowband composition reveals new structures in nebula,
they are very three dimensional and this position shows them best.
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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, 5X 1200s H-alpha, 2 X 1200 O-III and 2X1200s S-II + flats and bias
- Guiding, LX200 GPS 12" + PHD-guiding and Lodestar
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This is how Claifornia Nebula is usually shown.
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