Thursday, February 26, 2009
Cone and Rosette Nebula mosaic!
Cone and Rosette in HST-palette. Image spans horizontally 10 degrees.
Same image with reduced stars to show the nebulosity better.
Area in "natural" colors. Mixed from narrowband data; Red=70%H-a + 30%S-II, Green=100%=-III and Blue=85%O-III+15%H-a - -
Area in "natural" colors. Mixed from narrowband data; Red=70%H-a + 30%S-II, Green=100%=-III and Blue=85%O-III+15%H-a - -
At night of 24.02. I shot this data before a Comet Lulin in previous post. I allway wanted to show this interesting area between Rosette and Cone. As can be seen in the image, they both are part of same large nebula complex.
A horizontal versions Are for your viewing pleasure. Here is a real postion in the Sky, North up. 
This area is sometimes called as a "Christmas Tree Cluster". Now I can see why! With current equipments I can have both, highresolution and wide field. - - IMAGING DATA: Camera QHY9 Guiding QHY5 Optics Canon EF 200mm f1.8 lens Platform LX200 GPS 12" - Exposures for Cone Nebula part: H-a = 2 x 1200s S-II = 2 x 600s O-II = 2 x 600s - Exposures for Rosette Nebula part: H-a = 3 x 1200s S-II = 2 x 600s O-III = 2 x 600s - Final image is 7000 x 2500 pixels and the resolution is 5,5 pixels/arc second
This area is sometimes called as a "Christmas Tree Cluster". Now I can see why! With current equipments I can have both, highresolution and wide field. - - IMAGING DATA: Camera QHY9 Guiding QHY5 Optics Canon EF 200mm f1.8 lens Platform LX200 GPS 12" - Exposures for Cone Nebula part: H-a = 2 x 1200s S-II = 2 x 600s O-II = 2 x 600s - Exposures for Rosette Nebula part: H-a = 3 x 1200s S-II = 2 x 600s O-III = 2 x 600s - Final image is 7000 x 2500 pixels and the resolution is 5,5 pixels/arc second 
Wednesday, February 25, 2009
Comet Lulin
Two panel mosaic, the bright planet, in upper part of image, is Saturn. -
It seems, that there is lots of ionized gas in the comet Lulin.
I was litle sceptical about using narrowband filters to a broadband target, like a comet.
After all, there was plenty of signal from all three bands, S-II, H-a and O-III, there is even large differenses between differnt bands (look for the last image of this post)
Colors are mixed isn HST (Hubble Space Telescope) palette.
With extermely fast f1.8 200mm lens I used exposures from UHC-s filter's 30s
to 600s for Hydrogen alpha filter.
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comet with starfield The field of view is about five degrees!
The tail in the image is about 2.2 degrees
A starless version
This is a fast comet, exposure time about an hour.
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Eguipments:
Canon EF 200mm @ f1.8
camera, QHY9
Guiding, QHY5 and PHD-guiding
Exposures, H-a, S-II, O-III and UHC, total five hours.
Saturn & Comet Lulin as a Stereo Pair
Saturn is a bright planet in the upper part of the image. There is two moons visible next to saturn, Lapetus (upper one) and the Hyperion. Other moons can not be seen, since they are under the extence glow from the Saturn.
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Parallel Vision version 
Cross Vision version
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