Thursday, December 20, 2012
Caldwell 49, the "Rosette Nebula", reprocessed
Images are reprocessed with my new method. This new technique will provide better color handling, softer look and high details at the same time. I collected here my Rosette Nebula images, they form a kind of zoom in series, since I have shot this target with various instruments and different focal lengths .
Be sure to click the images to see them at a full glory.
"Rosette Nebula"
Ra 06h 33m 45s Dec +04° 59′ 54″, shot with a 200mm camera lens
Natural color composition from the emission of ionized elements, R=80%Hydrogen+20%Sulfur, G=100%Oxygen and B=85%Oxygen+15%Hydrogen to compensate otherwise missing H-beta emission. This composition is very close to a visual spectrum.
Image is shot with a Canon EF 200mm f1.8 lens, Baader narrowband filters and the QHY9, a cooled astronomical camera. Lens full open, exposure time ~4h
Closer look
Shot with a 300mm camera lens
Natural color composition from the emission of ionized elements, R=80%Hydrogen+20%Sulfur, G=100%Oxygen and B=85%Oxygen+15%Hydrogen to compensate otherwise missing H-beta emission. This composition is very close to a visual spectrum.
Image is shot with a Tokina AT-X 300mm f2.8 lens, Baader narrowband filters and the QHY9, a cooled astronomical camera. Lens full open, exposure time ~6h
Even closer look
Shot with a Meade LX200 12" telescope
Natural color composition from the emission of ionized elements, R=80%Hydrogen+20%Sulfur, G=100%Oxygen and B=85%Oxygen+15%Hydrogen to compensate otherwise missing H-beta emission. This composition is very close to a visual spectrum.
Image is shot with a Meade LX200 12" SC-telescope, Baader narrowband filters and the QHY9, a cooled astronomical camera, exposure time ~6h
INFO
The Rosette Nebula (also known as Caldwell 49) is a large, circular H II region located near one end of a giant molecular cloud in the Monoceros. The open cluster NGC 2244(Caldwell 50) is closely associated with the nebulosity, the stars of the cluster having been formed from the nebula's matter. The cluster and nebula locates at a distance of about 5,200 light years from Earth. The diameter is about 130 light years.
The radiation from the young stars ionized the atoms in the nebula, causing them to emit light, typical to each element, producing the visible nebula. Stellar winds, radiation pressure, from a group of stars cause compression to the interstellar clouds, followed by star formation in the nebula. This star formation is currently still ongoing.
Images in mapped colors
Colors are mapped to a HST-palette, R=Sulfur, G=Hydrogen and B=Oxygen
Be sure to click the images to see them at a full glory.
A two panel mosaic
Rosette in wider context
This image shows the Rosette nebula in wider field, the Cone Nebula and the Christmas Tree Cluster can be seen at left. Image is in mapped colors.
A study about the scale in the sky, compared to a full Moon
Technical details
All technical details can be found from my portfolio:
Tuesday, December 18, 2012
Christmas Tree cluster, Cone and the Rosette Nebulae
Images are reprocessed with my new method. This new technique will provide better color handling, softer look and high details at the same time.
Be sure to click the images to see them at a full glory.
A Cone and the Rosette Nebulae
A two panel mosaic
R=Sulfur, G=Hydrogen and B=Oxygen.
Buy a photographic print from HERE
A Cone nebula and the Christmas Tree Cluster
A closeup from the left part of the mosaic above
(And yes, the names are real ones, I didn't made the up...)
(And yes, the names are real ones, I didn't made the up...)
This very seasonal closeup shows the Cone Nebula and a Christmas Tree Cluster around it.
Buy a photographic print from HERE
Cone Nebula closeup
Click for a large image
Rosette Nebula closeup
Click for a large image
Visual color compositions
Be sure to click the images to see them at a full glory.
Natural color composition from the emission of ionized elements, R=80%Hydrogen+20%Sulfur, G=100%Oxygen and B=85%Oxygen+15%Hydrogen to compensate otherwise missing H-beta emission. This composition is very close to a visual spectrum.
A closeup
INFO
In the constellation of Monoceros, just east of Orion, lies this huge nebulous duo with the famous Rosette Nebula at right and the Cone Nebula at left. The Rosette is easily recognized as a large flower to the left with bright central stars. In . The nebula on the left halves of the mosaic contains 'The Christmas Tree' star cluster in the center. The Cone Nebula lays at distance of ~2500 light years and the Rosette about a distance at 5200 light years.
An experimental starless image
This image shows the are with suppressed stars, the nebula itself stands out better by this way.
The scale in the sky
Zoom in image series with a Moon as a scale
Cone Nebula:
Rosette Nebula:
Technical details
Camera QHY9
Guiding QHY5
Optics Canon EF 200mm f1.8 lens, full open
Imaging platform and guiding 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
Original image from the year 2009
http://astroanarchy.blogspot.fi/2009/02/cone-and-rosette-nebula-mosaic.html
Monday, December 17, 2012
Heart Nebula collection
I collected my images of the Heart nebula in this blog post. Most of the images are reprocessed with my new method. This new technique will provide better color handling, softer look and high details at the same time.
I have shot many targets with instruments of different focal lengths, this makes possible to show the fractal nature of our universum, more and more details shows up as focal length gets longer.
Be sure to click the images to see them at full glory.
Heart Nebula, collection of IC 1805 images
Zooming to the heart of the Heart, Melotte 15.
Zooming to the heart of the Heart, Melotte 15.
Heart & Soul Nebulae
IC 1805 in mapped colors, from the emission of ionized elements,
R=Sulfur, G=Hydrogen and B=Oxygen.
Heart Nebula, IC 1805, Sharpless 190 (Sh2-190) in Cassiopeia
Ra 02h 32m 36s Dec +61° 29′ 2″
Center parts of the Heart Nebula
Melotte 15, the heart of the Heart
Tip of the Heart Nebula, a closeup
IC 1795, a bright area at the tip of the Heart Nebula
INFO
The "Heart Nebula", IC1805 locates about 7500 light years away in constellation Cassiopeia. This is an emission nebula showing glow of ionized elements in a gas cloud and some darker dust lanes.
In a very center of the nebula, lays Melotte 15, it contains few very bright stars, nearly 50 times mass of our Sun, and many dim ones. The solar wind, a radiation pressure, from massive stars makes the gas twist to a various shapes.
A study about an apparent scale in the sky
Note, a Moon size circle as a scale, click for a large image!
Natural color composition from the emission of ionized elements, R=80%Hydrogen+20%Sulfur, G=100%Oxygen and B=85%Oxygen+15%Hydrogen to compensate otherwise missing H-beta emission. This composition is very close to a visual spectrum.
Technical data
Information for all of the images in this post, can be found from my portfolio:
Messier 27, the Dumbbell Nebula
I reprocessed this image since weather doesn't support imaging up here and my processing work flow is somehow different now. My new work flow produces softer images with high details.
Messier 27, the "Dumbbell Nebula"
Ra 19h 59m 36.340s Dec +22° 43′ 16.09″
M27 in mapped colors, from the emission of ionized elements,
R=Sulfur, G=Hydrogen and B=Oxygen.
Click for a large image.
The Dumbbell Nebula (also known as a Messier 27, M 27, or NGC 6853) is a planetary nebula in the constellation Vulpecula, at a distance of about 1360 light years. It has a large angular diameter as a planetary nebula, about 8 x 5,6 arc minutes. (Rarely imaged outer halo is not included, it can be seen in my image. With an outer shell, the diameter is over 15'' (more than a size of the half a Moon)
Planetary nebulae are shells of gas shed by stars late in their life cycles after using up all of their nuclear fuel. The star then ejects a gaseous shell, which is illuminated by its extremely hot central star, a core left from the original star. n this image, the central star is clearly visible at very center of the nebula.
M27's central star has a magnitude of 13.5 and is an extremely hot blueish dwarf with a temperature of about 85,000 K. Our own star, the Sun, is expected to undergo the same process in a couple of billion years.
A closeup from the image center,
the central star shines at magnitude 13,5
M27 in visual colors
Natural color composition from the emission of ionized elements, R=80%Hydrogen+20%Sulfur, G=100%Oxygen and B=85%Oxygen+15%Hydrogen to compensate otherwise missing H-beta emission. This composition is very close to a visual spectrum.
Click for a large image.
Closeup
A mapped color closeup with a different orientation.
Technical details:
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 @ 6,5Hz
Image Scale, 0,75 arcseconds/pixel
Exposures H-alpha 14x1200s, binned 1x1
2 x S-II 1x600s, binned 3x3
6 x O-III 1x600s, binned 2x2
A single 20 min. H-alpha light frame
Calibrated with Bias corrected flat and Dark masters in CCDStack
1200 seconds of light from the ionized Hydrogen with Meade LX200 12" @ f5, Baader 7nm H-a filter and a cooled astrocam QHY9. Image is scale down ~50% from the original.
At the time of imaging, the seeing was kind of good, FWHM around 2,5.
At the time of imaging, the seeing was kind of good, FWHM around 2,5.
Original version, from 2009, of Messier 27 can be seen here
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