Wednesday, December 12, 2012
The Wizard Nebula reprocessed
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 much softer images, I think.
NGC 7380, Sh2-1142, the "Wizard Nebula", in Cepheus
Ra 22h 47m 0s Dec +58° 06′ 00″
R=Sulfur, G=Hydrogen and B=Oxygen.
A closeup
Info
NGC 7380 is a catalog number of the open star cluster inside Wizard nebula, SH2-142.
Nebula locates in constellation Cepheus, about 7000 light years from my home.
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.
An experimental starless version
This image shows just the gas formation, without stars interfering.
Previous version
same raw data is used here
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 15x1200s, binned 1x1
S-II 1x1200s, binned 4x4
O-III 1x1200s, binned 4x4
Beside data here, a color information from an older wide field image is used.
Image can be seen here: http://astroanarchy.blogspot.fi/2011/02/sh2-142-wizard-nebula-wide-field.html
A study about an apparent scale in a sky
Monday, December 10, 2012
Elephant's Trunk nebula reprocessed
Weather doesn't support any imaging, so I reprocessed an older image, the Elephant's Trunk nebula.
Elephant's Trunk
A detail in IC 1396 emission nebula
Image in mapped colors from the light emitted by ionized elements.
Red=Sulfur, Green=Hydrogen and Blue=Oxygen.
Buy a photographic print from HERE
Buy a photographic print from HERE
The elephant's Trunk nebula is a concentration of interstellar gas and dust in the star cluster IC 1396.
This ionized gas region locates in the constellation Cepheus about 2400 light years away.
Formation is coursed by a stellar wind, radiation pressure, from a group of massive young stars.
Buy a photographic print from HERE
A detail
At the time of imaging, the seeing was very good, HWFM ~2.5
A wide field image of the area
The Trunk formation at bottom middle
More info about this image HERE.
Buy a photographic print from HERE
A Gargoyle of the sky
A Gargoyle?.. See HERE
Technical details
All technical details are with an original image HERE
Sunday, December 9, 2012
The Cave Nebula
I shot this target 29.11. but I'm publishing it now since this one was very hard to process due to its dimness.
Cave Nebula, Sharpless 155 (Sh2-155)
In constellation Cepheus
Red=Sulfur, Green=Hydrogen and Blue=Oxygen.
The Cave Nebula, Sh2-155 or Caldwell 9, is a dim and very diffuse bright nebula within a larger nebula complex containing emission, reflection, and dark nebulosity. It is located in the constellation Cepheus. The reflection, wide band, component can't be seen in my image, since this is a narrowband one.
Distance is about 2400 light years.
Distance is about 2400 light years.
Orientation in a wide filed image
Area of interest is marked as a white rectangle. More info about this image HERE.
An apparent size of the full Moon is marked at the lower right corner for a scale.
Click for a large image.
Technical details:
Processing work flow:
Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack2.
Levels, curves and color combine in PS CS3.
Optics, Meade LX200 GPS 12" @ f5
Camera, QHY9
Guiding, SXV-AO, an active optics unit, and Lodestar guide camera 8Hz
Image Scale, ~0,8 arc-seconds/pixel
15x 1200s exposures for the H-alpha, emission of ionized Hydrogen = 5h
Narrowband cahnnels for ionized Oxygen and Sulfur are taken from an older wide field image seen above.
Ps.
A single 20 min. H-alpha frame
Calibrated with Bias corrected flat and Dark masters in CCDStack
1200 seconds of H-aplha light with 12" SCT @ f5 and QHY9 astrocamera.
Image is scaled down 50% from original.
Friday, December 7, 2012
A quick one, Sh2-106
This is a kind of snapshot, only one hour of H-alpha filtered light. Sh2-106 is a compact star forming emission nebula in constellation Cygnus. I was planning to shot several hours of lights fro this onae in all three bands for a RGB-colors. How ever, this is a very small nebula and it needs a good seeing to work with. Seeing has been so poor up here, that I haven't been able to finalize this work. Maybe it'll work at next Autumn season....
Sharpless 106
In Cygnus, RA: 20h 30m 51.0s Dec: +37° 24' 35 Mag: 14.5, Distance: ~2000 ly
A colorized H-alpha emission image.
Sharpless 106 (Sh2-106) is a star forming region surrounded by dust and gasses in Cygnus. The central star is approximately 15 times the mass of our Sun and about 100,000 years old. Hourglass shape is coursed by a strong solar winds and material ejected from the star. The star is close to the bottom opening of the nebula in this image which glows the brightest. There are many sub-stellar objects forming within the nebula and may result in a cluster of 50 to 150 stars someday in future.
Technical details:
Processing work flow:
Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack2.
Levels and curves in PS CS3.
Optics, Meade LX200 GPS 12" @ f5
Camera, QHY9
Guiding, SXV-AO, an active optics unit, and Lodestar guide camera 8Hz
Image Scale, ~0,8 arc-seconds/pixel
3 x 1200s exposures for the H-alpha, emission of ionized Hydrogen = 1h
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