Saturday, December 18, 2010
Sh2-234 aka IC 417, start of the new project.
Sh2-234, IC417, sometimes called as "Spider Nebula", in constellation Auriga. H-alpha 15x1200s.
Distance is about 10.000 light years. Image is about 30' wide and covers about 100 light years.
Ra 05 hr 28 min 05.9 sec , Dec +34 hr 25 min26 sec
This is not too commonly imaged target due the lowish surface brightness and the proximity of two eye catchers, IC 405 and IC 410. Sh2-234, contains a young open star cluster that ionizing the surrounding gas.
I will shoot more lights for this object later, including O-III and S-II data.
I will shoot more lights for this object later, including O-III and S-II data.
HST-palette, (HST=Hubble Space Telescope)
from the emission of ionized elements, R=Sulfur, G=Hydrogen and B=Oxygen.
Color data is taken from my older, wide field image.
Area of interest is marked with a Red rectangle.
Imaging data of this wide field image can be seen here:
Technical details:
Processing work flow:
Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack.
Deconvolution with a CCDSharp, 30 iterations, 50% mix..
Levels, curves and color combine in PS CS3.
Telescope, Meade LX200 GPS 12" @ f5
Camera, QHY9 Guiding, SXV-AO @ 4,5Hz
Image Scale, 0,75 arcseconds/pixel
Baader H-alpha 7nm 15x1200s, binned 2x2
Friday, December 17, 2010
NGC 1499, reprocessed
I did reprocessed this nebula since my skills are much better now, than two years ago.
All the exposures I have taken for this object are used. Total exposure time is now about 20h together.
Two camera lenses was used to capture the data, a Tokina AT 300mm f2.8 and a Canon EF 200mm f1.8, both lenses was used at full aperture.
NGC 1499, the "California Nebula" locates in constellation Perseus. Distance is about 1000 light years.
The nebula covers about 2,5 degrees of sky.
RA 04h 03m 18.00s Dec +36° 25′ 18.0"
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.
HST-palette, (HST=Hubble Space Telescope)
from the emission of ionized elements, R=Sulfur, G=Hydrogen and B=Oxygen.
Narrowband data was used for Star colors this time, mixture of channels was the same as in first "natural" color composition image here.
There is a formation at Seven a clock, kind of half circle, it might be an old uncategorized planetary nebula?
The original Blogpost can be seen here:
Tuesday, December 14, 2010
NGC 1499 as a Stereo pair 3D
Parallel vision 3D
Cross vision 3D
Other 3D-formats:
Original 2D-image with the technical details:
NOTE! This is a personal vision about forms and shapes, based on some known facts and an artistic impression.
NGC 1499 closeup as an Anaglyph Red/Cyan 3D
You'll need Red/Cyan Eyeglasses to be able to see this image right.
Note, if you have a Red and Blue filters, you can use them! Red goes to Left eye.
Other 3D-formats:
Original 2D-image with the technical details:
NOTE! This is a personal vision about forms and shapes, based on some known facts and an artistic impression.
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