Tuesday, September 21, 2010
NGC 7380 and the "Wizard Nebula", start of the new project
NGC 7380, Sh2-142 , the "Wizard Nebula", locates in constellation Cepheus about 7000 light years from Oulu, Finland. The open star cluster has a catalog number NGC 7380. It's a relatively young cluster, about 5 million years. Nebula spans some 110 light years.
There is only 1h 20 min. H-a light for the object, due some technical problems. Ones again, I spend most of the night by fixing my ***** scope.
Seeing was better than usually, FWHM about 2,5".
Seeing was better than usually, FWHM about 2,5".
I'll shoot much more H-alpha data and other NB channels, S-II and O-III later.
Image is very noisy due the short exposure time.
Image is very noisy due the short exposure time.
Technical details:
processing work flow:
Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack.
Levels and curves in PS CS3.
Telescope, Meade LX200 GPS 12" @ f5
Camera, QHY9 Guiding, SXV-AO @ 6Hz
Image Scale, 0,75 arcseconds/pixel
Exposures H-alpha 4x1200s, binned 1x1
Monday, September 20, 2010
NGC 7000 closeup, HST-palette preview
NGC 7000 in HST-palette from the emission of ionized elements, R=Sulfur, G=Hydrogen and B=Oxygen.
This is kind of preview image, since HST-palette colors are borrowed from an older, wide field image of North America nebula. I'll shoot new, high resolution, color channels for O-III and S-II, when ever weather up here allows me to do so.
Technical details for the older image, from 2008, can be found here: http://astroanarchy.blogspot.com/2008/09/my-first-ever-narrowband-color-image.html
(This is actually my first ever narrow band color image!)
Colors are taken from this image of North America and Pelican nebulae.
More "Monitor friendly" orientation.
Technical details for closeup:
processing work flow:
Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack.
Deconvolution with a CCDSharp, 30 iterations.
Levels, curves and color combine in PS CS3.
Telescope, Meade LX200 GPS 12" @ f5
Camera, QHY9 Guiding, SXV-AO @ 6Hz
Image Scale, 0,75 arcseconds/pixel
Exposures H-alpha 15x1200s, binned 1x1=5h
O-III 1x1200s binned 3x3
Technical details for wide field image:
-
NOTE
processing work flow:
Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack.
Deconvolution with a CCDSharp, 30 iterations.
Levels, curves and color combine in PS CS3.
Telescope, Meade LX200 GPS 12" @ f5
Camera, QHY9 Guiding, SXV-AO @ 6Hz
Image Scale, 0,75 arcseconds/pixel
Exposures H-alpha 15x1200s, binned 1x1=5h
O-III 1x1200s binned 3x3
Technical details for wide field image:
Tokina AT-X 300mm f2.8 manual focus lens.
This is a very modest example of three colur narrowband image. But I place it here, since it's my first one. At 11.09. I mainly shoot H-alpha, but before clouds rolled in I managed to capture 4 x 900s O-III and only single shot of S-II, 900s. I will shoot more O-III and S-III when ever weather allows me to do so. In this image the "Hubble paletete" is used where S-II = Red, H-alpha = Green and O-III = Blue-
NOTE
This image is taken by using QHY8 cooled 6.1mb color camera. Its not an ideal tool for narrowband imaging.
Each color channel is shooted trough separate filter, this means, that only 1/4 pixels are used for H-alpha and S-II. O-III goes mainly to the Green and Blue pixels of the Bayer matrix array, so about 3/4 of the pixels are used in this case. How ever, very high quality narrowband images has been taken by using color cameras.
Sunday, September 19, 2010
NGC 7000 closeup as an animation, new edition
Animations are made by creating artificial parallax to an image. Then two images are animated together by using conversion web service, Start3D. There can be some artifacts in images, due the experimental nature of this work! The volumetric models are based on some known facts and an artistic impression.
Please, let the images load for few seconds to see them animated!
Other 3D-formats can be found here:
Original 2D-image and details:
NOTE! This 3D-study is a personal vision about forms and shapes, based on some known facts and an artistic impression.
NGC 7000 as a Stereo pair, second edition
Parallel vision
Cross vision
Other 3D-formats can be found here:
Original 2D-image and details:
NOTE! This 3D-study is a personal vision about forms and shapes, based on some known facts and an artistic impression.
Viewing instructions can be found from a Right hand side menu.
Viewing instructions can be found from a Right hand side menu.
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